The world of electric motors is quite fascinating. For many making and collecting various types of electric motors is a hobby and for others making the best electric motors to power various devices is a profession. Whatever the approach is, but electric motors offer innumerable possibilities for improvisation. Working with electric motors and understanding them is a rewarding and learning experience. Let us find out more about electric motors in general. Usually, electric motors can be classified into two main types. They are direct current or DC and alternating current or AC motors. DC or AC is very common terms and they refer to how the electrical current is transferred through and from the motor. Both types of motors have different utilities and uses.
DC motors are usually available in two general types. Alike that, AC motors also come in two different types. They can be two phase or three phase AC motors. Although on technical front, the differences in DC and AC motors are sometimes marginal, but some of these differences make one types better than the other for a certain use. In general, the DC electric motors work for conditions controlling the speed is essential. It is due to the factor that DC motors have a steady and constant current. DC motors are also the first and earliest motors used. But these good factors are also accompanied with some limitations; for instance, the DC electric motors are incapable of producing power over long period of time. Most of the electric companies are aware of the limitation of the DC motor and have found that the power was lost as the electric current was transmitted. One of the variant, the Brush DC motors, use certain rings that conduct the current and form the magnetic drive that runs the rotor. On the other hand, the brush-less DC electric motors bring forth a switch to generate the magnetic drive that powers the rotor. Direct current motors commonly used in most of the electric appliances in your home.
Now coming back to the AC motors we find that these kinds of motors are commonly used on the basis of their type. For instance, the single phase AC motors are used for general purpose. This type of motors will work efficiently in different conditions. AC motors are effective for systems that are hard to start because they need a lot of power for this purpose. The three phase AC motors, also called polyphase, are commonly found in industrial sector. The AC motors have a high starting power built to transmit lower levels of overall power. As it alternated the power, so it gets its name AC. The amount of power specified by an AC motor is determined by the amount of power needed to operate the system.
Generally, the DC and AC electric motors are easily come across everywhere from the home to the car to industrial uses. The introduction of DC motors is still considered no less than a revolution and when AC motors were available in the market the way motors were looked at changed because of their amazing starting power potential. DC motors and AC motors are different in many ways, but they still both are used to power the world of electric appliances.
http://www.articlefrenzy.com/Article/Understanding-Electric-Motors/118291
Wednesday, October 31, 2007
Your Guide to Hidden Cameras and Other Security Cameras
With Father's Day just around the corner, it's time once again to figure out what I'm going to get my dad. Like many men, he's an electronics enthusiast through and through. He's what companies like (or love) to call an "early adopter" - someone who just can't wait to buy the latest gadget, the faster computer, the bigger HDTV, and anything else you can think of. His obsession definitely has its benefits, though. My sister and I regularly go through his "electronics graveyard" and get fully functional computers, DVD recorders, and all manner of accessories.
But this knack of his to buy the latest electronics makes it that much more difficult to figure out what to get him for his birthday, Christmas, and Father's Day. My sister and I are thinking about buying him a new digital camera for Father's Day, one that has 7.0 megapixels, an optical zoom, and a special setting for taking eBay pictures. Dad is an avid eBay seller, and the right photos can make the difference between selling an item at a decent price and at a great price. The new digital cameras that have the special eBay setting would complement two of his passions: electronics and eBay.
We're also considering buying him a GPS receiver. The Global Positioning System is a set of satellites in orbit high above the earth, and a GPS receiver can tell you, in terms of latitude and longitude, exactly where you are. Some GPS receivers have built-in mapping tools that not only include road maps, but that also show places of interest. So, for example, when Dad's traveling and needs to find a gas station, he can "ask" the GPS system where the nearest gas station is, and then receive directions to it.
A GPS receiver is also perfect for a new "sport" that I've become interested in, and one that I think Dad would love. Geocaching is a hobby that is quite a bit like a treasure hunt. People all over the globe hide small containers that contain trinkets and logbooks, ascertain the latitudinal and longitudinal coordinates of the hiding spots, and post them online. You can go online and find the coordinates of caches near where you live or travel, enter them into your GPS receiver, and then try and find the cache. It's not as easy as it sounds, but it sure is a lot of fun. Once you find a cache, you can pick up a trinket, leave a trinket, and sign the logbook. Dad's expressed an interest in geocaching, and since he does a lot of traveling for his work, my sister and I think that a GPS receiver and a book on geocaching might make the perfect Father's Day gift.
In my heart, I know that our dad will appreciate whatever gift we choose. Any type of electronics will tickle his fancy, and I'm sure that he'll enjoy either a digital camera or a GPS system. The only thing we have to worry about is whether he'll go out and buy one for himself before we get a chance to give him his Father's Day gift!Hidden cameras have become very popular in recent years with business owners, law enforcement officers and parents. Business owners often use surveillance systems to keep an eye on employees or their store to protect the business from theft or abuse. Hidden cameras are used by the police to catch criminals in the act or to record arrests as they occur. Parents use nanny cams to make sure their children are being properly treated. If you're thinking of buying a hidden camera or other type of security camera, here's a quick guide below.
How Hidden Cameras Work
There are two types of hidden cameras - wireless and wired. Wireless hidden cameras use batteries and have the camera and transmitter concealed with no visible wire from the camera to the recording equipment. Wired cameras will have a physical wire running from a VCR or PC to the camera.
To determine if you need a wireless or wired hidden camera, consider the length of time you will need to record. Will the batteries hold up long enough? The location of the hidden camera is also important. Hidden cameras come in a variety of shapes, forms and themes. Choose a camera that goes well with the environment around so it will be unnoticeable. Some cameras feature wide-angle viewing, which comes in handy when you need to survey a large area. Also, the lighting of the area is important. Check the hidden camera's resolution before buying.
Types of Hidden Cameras and Security Cameras
There are many types of hidden cameras and security cameras for all situations. From dummy cameras to professional cameras, each one serves its own unique purpose. Here are some types of cameras and their benefits.
Nanny Cams
Protect your children throughout the day with a nanny cam. Even if you have a nanny you feel you can trust, it doesn't hurt to have a nanny cam for the safety of your children and home. Nanny cams are actually hidden cameras that come in many shapes and sizes. The camera might be embedded in children's items such as teddy bears, backpacks, baby wipe containers, dolls, stuffed animals, etc. These items can be placed in the child's room along with other toys. There are also nanny cams for other rooms of the home, including clocks, radios, table lamps, food containers, thermostats, pillows, picture frames, hair dryers, DVD players, etc. Every room can have a nanny cam if needed. Check with your local law enforcement before getting a nanny cam or hidden camera for your home to be sure there are no restrictions.
Surveillance Systems
If you need more than a few hidden cameras, consider a surveillance system. Surveillance systems enable you to observe multiple locations through one sophisticated system. With a channel DVR system, hidden cameras are set up in different areas and interconnected so you can survey all the areas through multiple channels. You can expand your surveillance system as your business or operation grows. There are also portable DVR surveillance systems and those that enable you to monitor the area from any location online.
Monitors
Monitors are screens that show what is going on as it happens. Many public places have monitors set up to let people know they are being recorded. Some monitors are used by the owners or security guards to keep an eye on areas from behind the scenes.
Dummy Cameras
Dummy cameras are not hidden cameras or even real security cameras. They look like real security cameras and give an appearance that the area is being recorded. The thieves won't know if the camera is real or not. Dummy cameras are often used as a deterrent by many business owners.
Professional Cameras
Professional cameras are often used to survey large businesses or offices, inside or outside. They can be mounted on walls or ceiling brackets. Some are waterproof for outdoor surveillance. A variety of professional cameras are available for different situations.
Hidden cameras and security cameras are great for protecting your children, home, business or property. Use the guide above to find the hidden camera or security camera that's right for you.
http://www.articlefair.com/Article/Your-Guide-to-Hidden-Cameras-and-Other-Security-Cameras/15678
But this knack of his to buy the latest electronics makes it that much more difficult to figure out what to get him for his birthday, Christmas, and Father's Day. My sister and I are thinking about buying him a new digital camera for Father's Day, one that has 7.0 megapixels, an optical zoom, and a special setting for taking eBay pictures. Dad is an avid eBay seller, and the right photos can make the difference between selling an item at a decent price and at a great price. The new digital cameras that have the special eBay setting would complement two of his passions: electronics and eBay.
We're also considering buying him a GPS receiver. The Global Positioning System is a set of satellites in orbit high above the earth, and a GPS receiver can tell you, in terms of latitude and longitude, exactly where you are. Some GPS receivers have built-in mapping tools that not only include road maps, but that also show places of interest. So, for example, when Dad's traveling and needs to find a gas station, he can "ask" the GPS system where the nearest gas station is, and then receive directions to it.
A GPS receiver is also perfect for a new "sport" that I've become interested in, and one that I think Dad would love. Geocaching is a hobby that is quite a bit like a treasure hunt. People all over the globe hide small containers that contain trinkets and logbooks, ascertain the latitudinal and longitudinal coordinates of the hiding spots, and post them online. You can go online and find the coordinates of caches near where you live or travel, enter them into your GPS receiver, and then try and find the cache. It's not as easy as it sounds, but it sure is a lot of fun. Once you find a cache, you can pick up a trinket, leave a trinket, and sign the logbook. Dad's expressed an interest in geocaching, and since he does a lot of traveling for his work, my sister and I think that a GPS receiver and a book on geocaching might make the perfect Father's Day gift.
In my heart, I know that our dad will appreciate whatever gift we choose. Any type of electronics will tickle his fancy, and I'm sure that he'll enjoy either a digital camera or a GPS system. The only thing we have to worry about is whether he'll go out and buy one for himself before we get a chance to give him his Father's Day gift!Hidden cameras have become very popular in recent years with business owners, law enforcement officers and parents. Business owners often use surveillance systems to keep an eye on employees or their store to protect the business from theft or abuse. Hidden cameras are used by the police to catch criminals in the act or to record arrests as they occur. Parents use nanny cams to make sure their children are being properly treated. If you're thinking of buying a hidden camera or other type of security camera, here's a quick guide below.
How Hidden Cameras Work
There are two types of hidden cameras - wireless and wired. Wireless hidden cameras use batteries and have the camera and transmitter concealed with no visible wire from the camera to the recording equipment. Wired cameras will have a physical wire running from a VCR or PC to the camera.
To determine if you need a wireless or wired hidden camera, consider the length of time you will need to record. Will the batteries hold up long enough? The location of the hidden camera is also important. Hidden cameras come in a variety of shapes, forms and themes. Choose a camera that goes well with the environment around so it will be unnoticeable. Some cameras feature wide-angle viewing, which comes in handy when you need to survey a large area. Also, the lighting of the area is important. Check the hidden camera's resolution before buying.
Types of Hidden Cameras and Security Cameras
There are many types of hidden cameras and security cameras for all situations. From dummy cameras to professional cameras, each one serves its own unique purpose. Here are some types of cameras and their benefits.
Nanny Cams
Protect your children throughout the day with a nanny cam. Even if you have a nanny you feel you can trust, it doesn't hurt to have a nanny cam for the safety of your children and home. Nanny cams are actually hidden cameras that come in many shapes and sizes. The camera might be embedded in children's items such as teddy bears, backpacks, baby wipe containers, dolls, stuffed animals, etc. These items can be placed in the child's room along with other toys. There are also nanny cams for other rooms of the home, including clocks, radios, table lamps, food containers, thermostats, pillows, picture frames, hair dryers, DVD players, etc. Every room can have a nanny cam if needed. Check with your local law enforcement before getting a nanny cam or hidden camera for your home to be sure there are no restrictions.
Surveillance Systems
If you need more than a few hidden cameras, consider a surveillance system. Surveillance systems enable you to observe multiple locations through one sophisticated system. With a channel DVR system, hidden cameras are set up in different areas and interconnected so you can survey all the areas through multiple channels. You can expand your surveillance system as your business or operation grows. There are also portable DVR surveillance systems and those that enable you to monitor the area from any location online.
Monitors
Monitors are screens that show what is going on as it happens. Many public places have monitors set up to let people know they are being recorded. Some monitors are used by the owners or security guards to keep an eye on areas from behind the scenes.
Dummy Cameras
Dummy cameras are not hidden cameras or even real security cameras. They look like real security cameras and give an appearance that the area is being recorded. The thieves won't know if the camera is real or not. Dummy cameras are often used as a deterrent by many business owners.
Professional Cameras
Professional cameras are often used to survey large businesses or offices, inside or outside. They can be mounted on walls or ceiling brackets. Some are waterproof for outdoor surveillance. A variety of professional cameras are available for different situations.
Hidden cameras and security cameras are great for protecting your children, home, business or property. Use the guide above to find the hidden camera or security camera that's right for you.
http://www.articlefair.com/Article/Your-Guide-to-Hidden-Cameras-and-Other-Security-Cameras/15678
Tuesday, October 30, 2007
The rate of technological development
If we look over the last century and examine the rate of technological growth. We can forgive ourselves for feeling a little proud about how quickly things have moved forward compared to the previous centuries. Flying at speed. Moving underwater stealthily. Travelling in space to name a fraction of what the human race has achieved in such a short span of time.
The big question though, is could we have progressed any faster and further in that space of time? The answer to that question is a big resounding YES!
Since we have been civilised enough to be able to maintain a system of currency, we have had to rely on that very method of exchange, and commerce has taken full advantage of this situation. In fact, commerce has become so powerful that it actually controls the rate at which we progress.
There are currently three levels of technology in existence.
1) Commercial Technology.
This is the technology we use in everyday life. Covering all manner of toys, tools and useful objects. However, the level at which commercial technology is at. Is higher than that used in commercially available products. Now we could argue that the technology they hold back, is not fully tested, and therefore not completely safe. This might be true in very small percentages. The major reason for holding back is good old money. It's all about making as much money out of a particular product before they move on to the next one. How many times have you seen products advertised as cutting edge at cut price? Only to find that they are outdated months later. Hard selling of latest technology at low prices is a key indicator that commerce is about to release a technologically superior product. So perhaps you can now see the control. What would happen to our technology if this didn't happen?
2) Military Technology.
This is more advanced than commercial technology. There's a lot of military technology we know about, and a lot we don't know about. Governments will hold back the release of this technology into the commercial arena, because it can give them a tactical advantage in a military sense. The components used in military hardware will generally have a longer life than those used in commercial products. I remember having a component catalogue in the 1980's. I could buy standard or military components. Standard were guaranteed for 1 year. Military for 5 years. They are generally more expensive. Commerce avoids using these products. The excuse is cost but it's more likely to be because they want to sell you products at regular intervals. Having a product that lasted for a long time would be counter productive to them.
3) Experimental Technology.
This area is way ahead of commercial technology, but is closely watched by the military. There are developments currently in progress which are things that you possibly, couldn't even comprehend, or didn't even think was in the realm of possibility. The deepest and most secret of these are run by government bodies, and some of them, apparently, don't exist. Again, this is for tactical reasons. If you could see what they were cooking up you would be amazed in one sense, and possibly frightened out of your skin.
So there we have it. After taking all these points into consideration, it's quite obvious to see that progress is thwarted by these processes. Well, let's see what the next few decades bring. Don't worry though. Most of it is already here.
About the Author
Jeffrey Edwards co-runs http://www.hammocksurvivalguide.com/ . Feel free to reprint this article in its entirety in your ezine, newsletter or website as long as the article's content is not modified and all links are included.
The big question though, is could we have progressed any faster and further in that space of time? The answer to that question is a big resounding YES!
Since we have been civilised enough to be able to maintain a system of currency, we have had to rely on that very method of exchange, and commerce has taken full advantage of this situation. In fact, commerce has become so powerful that it actually controls the rate at which we progress.
There are currently three levels of technology in existence.
1) Commercial Technology.
This is the technology we use in everyday life. Covering all manner of toys, tools and useful objects. However, the level at which commercial technology is at. Is higher than that used in commercially available products. Now we could argue that the technology they hold back, is not fully tested, and therefore not completely safe. This might be true in very small percentages. The major reason for holding back is good old money. It's all about making as much money out of a particular product before they move on to the next one. How many times have you seen products advertised as cutting edge at cut price? Only to find that they are outdated months later. Hard selling of latest technology at low prices is a key indicator that commerce is about to release a technologically superior product. So perhaps you can now see the control. What would happen to our technology if this didn't happen?
2) Military Technology.
This is more advanced than commercial technology. There's a lot of military technology we know about, and a lot we don't know about. Governments will hold back the release of this technology into the commercial arena, because it can give them a tactical advantage in a military sense. The components used in military hardware will generally have a longer life than those used in commercial products. I remember having a component catalogue in the 1980's. I could buy standard or military components. Standard were guaranteed for 1 year. Military for 5 years. They are generally more expensive. Commerce avoids using these products. The excuse is cost but it's more likely to be because they want to sell you products at regular intervals. Having a product that lasted for a long time would be counter productive to them.
3) Experimental Technology.
This area is way ahead of commercial technology, but is closely watched by the military. There are developments currently in progress which are things that you possibly, couldn't even comprehend, or didn't even think was in the realm of possibility. The deepest and most secret of these are run by government bodies, and some of them, apparently, don't exist. Again, this is for tactical reasons. If you could see what they were cooking up you would be amazed in one sense, and possibly frightened out of your skin.
So there we have it. After taking all these points into consideration, it's quite obvious to see that progress is thwarted by these processes. Well, let's see what the next few decades bring. Don't worry though. Most of it is already here.
About the Author
Jeffrey Edwards co-runs http://www.hammocksurvivalguide.com/ . Feel free to reprint this article in its entirety in your ezine, newsletter or website as long as the article's content is not modified and all links are included.
Unlimited PSP Downloads ... Is it a Myth ?
The PSP is a machine which is a great source of entertainment for you and your family. This is a machine where you can not only play games but also play music, movies; browse the internet and store vital digital data.
It is not necessary that you always buy the music, games and movies you wish to run on the PSP. There are plenty options available on the internet where you can avail of your free PSP downloads.
The PSPs are usually handheld devices where you can transfer the movies, music, software, games, e-books, images and TV shows that you download from the Wi-Fi hot spots of the internet. This is where you can avail of your free PSP downloads for use on the PSP.
The main reason these downloads are called free is because there is no use for you to buy a physical disc to download the programs. They just have to be downloaded to a computer, and then transferred from the computer to the PSP.
The first thing you have to do to get free PSP downloads is to surf the internet for the respective sites. There are many sites on the internet that offer free PSP downloads to PSP owners.
These sites are generally free where you just have to register wherein you can download all the games, music, movies, etc for use on your PSP. These sites have two types of offers; some sites charge a monthly membership fees while others have a once off membership fees wherein there are no limitations on the number of free PSP downloads you make.
In fact, you are also permitted to burn these downloads on a disc.
Collecting unlimited PSP downloads for movies was impossible in the past without burning deep holes in our pockets. Watching PSP movies on your PSP while on the move in the train, car or bus was such an enjoyable experience.
But once the credit card statement arrives at your desk, suddenly reality jolts you back onto earth. Your credit limit has been busted and you instantly realize that you have spent all your money building your private collection of PSP movies and games.
Well, there is a way to avoid this scenario. Let us look at what are the options available if you are tempted to grab your next PSP movie.
We used to be able to watch PSP movies only in the Universal Media Disc (UMD) format. Anyone who has bought a copy of these PSP UMD would know that it is not the cheapest form of entertainment. Many folks felt that they did not really have many choices if they wanted to watch a movie on their PSP.
The UMD movies are expensive and the selection is limited. The technology has made them rather unaffordable to teens, which form a significant percentage of their target market. Naturally, sales plummeted and many studios and distributors are unwilling to release more movies in the UMD format. It is little wonder why the UMD movies could not take off.
Forget about UMD movies. It is amazing how PSP fans came up with creative solutions to this problem. People began to rip movies off DVDs onto their PC before transferring the file into the PSP. It is possible to do so since the movie format is compatible with the Sony memory sticks.
However, there are two shortcomings in this whole process of ripping and copying. Firstly, the memory sticks do not have enough capacity like our hard drives. The quality of the movies is compromised.
Secondly, some DVDs are copyrighted, meaning that they are hard coded and there is no way you can crack them and rip the content off.
You can expect the new DVDs to be coded in such a manner. It seems that the manufacturers and studios have beaten PSP users at their game.
It is rather ironical since these users are part of the movie watching group who has been fuelling the demand for more movies over the years. Then again, its an issue of profits and if you are not paying to rip the movie, they have every right to stop you from doing so.
It seems like PSP users are stuck in a grid lock. Fortunately, smart business people saw the opportunity and established membership sites that offer unlimited PSP downloads of movies, games, music, TV shows, etc.
You may wish to know that at these download sites, the movies come in ready to play format. No ripping is needed. Everything from searching to downloading and playing the movie are compressed into a few clicks of the mouse.
http://www.simplysearch4it.com/article/52124.html
It is not necessary that you always buy the music, games and movies you wish to run on the PSP. There are plenty options available on the internet where you can avail of your free PSP downloads.
The PSPs are usually handheld devices where you can transfer the movies, music, software, games, e-books, images and TV shows that you download from the Wi-Fi hot spots of the internet. This is where you can avail of your free PSP downloads for use on the PSP.
The main reason these downloads are called free is because there is no use for you to buy a physical disc to download the programs. They just have to be downloaded to a computer, and then transferred from the computer to the PSP.
The first thing you have to do to get free PSP downloads is to surf the internet for the respective sites. There are many sites on the internet that offer free PSP downloads to PSP owners.
These sites are generally free where you just have to register wherein you can download all the games, music, movies, etc for use on your PSP. These sites have two types of offers; some sites charge a monthly membership fees while others have a once off membership fees wherein there are no limitations on the number of free PSP downloads you make.
In fact, you are also permitted to burn these downloads on a disc.
Collecting unlimited PSP downloads for movies was impossible in the past without burning deep holes in our pockets. Watching PSP movies on your PSP while on the move in the train, car or bus was such an enjoyable experience.
But once the credit card statement arrives at your desk, suddenly reality jolts you back onto earth. Your credit limit has been busted and you instantly realize that you have spent all your money building your private collection of PSP movies and games.
Well, there is a way to avoid this scenario. Let us look at what are the options available if you are tempted to grab your next PSP movie.
We used to be able to watch PSP movies only in the Universal Media Disc (UMD) format. Anyone who has bought a copy of these PSP UMD would know that it is not the cheapest form of entertainment. Many folks felt that they did not really have many choices if they wanted to watch a movie on their PSP.
The UMD movies are expensive and the selection is limited. The technology has made them rather unaffordable to teens, which form a significant percentage of their target market. Naturally, sales plummeted and many studios and distributors are unwilling to release more movies in the UMD format. It is little wonder why the UMD movies could not take off.
Forget about UMD movies. It is amazing how PSP fans came up with creative solutions to this problem. People began to rip movies off DVDs onto their PC before transferring the file into the PSP. It is possible to do so since the movie format is compatible with the Sony memory sticks.
However, there are two shortcomings in this whole process of ripping and copying. Firstly, the memory sticks do not have enough capacity like our hard drives. The quality of the movies is compromised.
Secondly, some DVDs are copyrighted, meaning that they are hard coded and there is no way you can crack them and rip the content off.
You can expect the new DVDs to be coded in such a manner. It seems that the manufacturers and studios have beaten PSP users at their game.
It is rather ironical since these users are part of the movie watching group who has been fuelling the demand for more movies over the years. Then again, its an issue of profits and if you are not paying to rip the movie, they have every right to stop you from doing so.
It seems like PSP users are stuck in a grid lock. Fortunately, smart business people saw the opportunity and established membership sites that offer unlimited PSP downloads of movies, games, music, TV shows, etc.
You may wish to know that at these download sites, the movies come in ready to play format. No ripping is needed. Everything from searching to downloading and playing the movie are compressed into a few clicks of the mouse.
http://www.simplysearch4it.com/article/52124.html
Monday, October 29, 2007
Electronics Wholesale List
Anyone who makes to make it in the electronics business knows that the trick to survival (and to making profits) is in finding good wholesalers. Wholesalers can provide you with products at very cheap prices, so that you can benefit financially. If you’re interested in making money through electronics, you need to put together a electronics wholesale list.
So, what’s a electronics wholesale list? This is the list you’re going to compile of electronics wholesalers, companies that you can contact about buying products for your electronics sales. These products can be re-sold on eBay, on your personal web site, or inside a store front that you own. And it all starts with the electronics wholesale list.
How do you go about putting together a electronics wholesale list? First, you have to find some viable electronics wholesales and familiarize yourself with the products that they offer. Don’t choose a electronics wholesale that doesn’t carry products you’re interested in – why would you? Look only at those suppliers that have products that strike your fancy. An Internet search should yield hundreds of possibilities for you to look into.
Put all your wholesaler information into your electronics wholesale list, which should contain product information as well as pricing. Use a spreadsheet to help organize your electronics wholesale list, and be sure to include contact information on the list. The purpose of the electronics wholesale list is to allow you to get all the information you need in a glance, so keep that in mind as you put together your list. Include only those electronics wholesales whose products and pricing meet with your electronics needs.
Once you’ve put together your electronics wholesale list, you can access all your electronics wholesale information at once. This makes your job as a electronics retailer much easier, and will help you complete your goals that much more efficiently. Look for information online. Most electronics wholesales have their own web sites that will contain all the information you need for your electronics wholesale list. Once you work with some of these suppliers, you can add notes to your list that will help you in the future. The electronics wholesale list is a great way to keep everything organized, so you can access a supplier’s information at a moment’s notice.
So, what’s a electronics wholesale list? This is the list you’re going to compile of electronics wholesalers, companies that you can contact about buying products for your electronics sales. These products can be re-sold on eBay, on your personal web site, or inside a store front that you own. And it all starts with the electronics wholesale list.
How do you go about putting together a electronics wholesale list? First, you have to find some viable electronics wholesales and familiarize yourself with the products that they offer. Don’t choose a electronics wholesale that doesn’t carry products you’re interested in – why would you? Look only at those suppliers that have products that strike your fancy. An Internet search should yield hundreds of possibilities for you to look into.
Put all your wholesaler information into your electronics wholesale list, which should contain product information as well as pricing. Use a spreadsheet to help organize your electronics wholesale list, and be sure to include contact information on the list. The purpose of the electronics wholesale list is to allow you to get all the information you need in a glance, so keep that in mind as you put together your list. Include only those electronics wholesales whose products and pricing meet with your electronics needs.
Once you’ve put together your electronics wholesale list, you can access all your electronics wholesale information at once. This makes your job as a electronics retailer much easier, and will help you complete your goals that much more efficiently. Look for information online. Most electronics wholesales have their own web sites that will contain all the information you need for your electronics wholesale list. Once you work with some of these suppliers, you can add notes to your list that will help you in the future. The electronics wholesale list is a great way to keep everything organized, so you can access a supplier’s information at a moment’s notice.
Article Source: http://EzineArticles.com/?expert=Emma_Drosy
Seeking a Career in Electronics
People who like tinkering with malfunctioning electronic gadgets or have a knack for fixing broken televisions can become great employees within the electronics career field. Today, there are plenty of job opportunities and career choices within the electronics industry that allow individuals to explore technical aspects, creativity, and sales. With appropriate education and experience, one can make a decent living in the electronics field by pursuing a variety of exciting and challenging career opportunities.
Common Electronics Careers and Jobs
Electronics engineers are responsible for an array of technologies that span portable music players to global positioning systems (GPS). Many electronics engineers also work closely with computers and other electronic equipment. A variety of skills are associated with this type of job position, which deals with communications, control systems, and signal processing. Usually, a specialty is attached to the title of electronics engineer. An example of this is seen in the aviation electronics engineer that works for the military. There are also analysts in this field, such as the Airborne Electronics Analyst in charge of controlling airborne electronic systems that identify ships and submarines. They also help with vital search and rescue operations.
As a Level I Electronics Assembler, one puts together electronics to match product specifications. A high school diploma or its equivalent is required for this type of job, where 0 to 3 years of experience in the field is a plus. An Electronics Assembler should possess knowledge on commonly-used concepts, practices, and procedures pertaining to their assigned product, as well as possess the ability to follow instructions and pre-set guidelines. Immediate supervision generally watches over worker progress. Usually, reports are made to supervisors or managers. The average salary for an Electronics Assembler is between $22,493 and $29,738.
As a Level I Electric/Electronics Technician, workers construct, maintain, and test electrical systems and their components. A high school diploma or its equivalent is needed for this type of job, where the completion of an apprenticeship and/or formal specialty training will elevate salaries and lead to more job opportunities. An electronic technician may tackle numerous jobs, such as the service and repair of both household and business electronic equipment. This may include radios, televisions and computers. Sometimes, employees are situated within a specific field, such as serving the medical, manufacturing, military, or telecommunications sector. An Electric/Electronics Technician I usually makes between $33,097 and $40,342, while an Electric/Electronics Technician III may earn between $49,269 and $61,874.
Home electronics repairers showcase their talents as installers and repairers of televisions, stereos, video cameras, as well as DVD and CD players. Those who work in shops are called bench technicians, while the repairer that visits the home is referred to as a field technician. Common duties include installing and tuning equipment to achieve the best sound or visual output; replacing faulty parts; and making service calls.
Educational Requirements: Electronics Career
The preparation for a career in electronics begins in high school, as a strong foundation in science and mathematics helps individuals pursue this type of job. Students in high school should focus on taking courses, such a physics and chemistry. Some positions also require advanced written and oral skills. Higher education paths associated with entering the electronics field include receiving a Bachelor of Science or an associates degree. Some of the college courses you may encounter include information on circuits, linear systems, electromagnetic fields, and computing.
Working in Electronics: United States & Canada
When it comes to working in the electronics industry, there are many different companies with a reputation for providing satisfying compensation and benefits throughout the United States and Canada. For starters, Microsoft is known for providing some of the best compensation and benefits for their employees, who work in a variety of positions, such as electronics engineers and electronic design engineers. Texas Instruments also pays their employees well, as an electrical design engineer stands to make an annual average salary of $109,223.
Panasonic is the international brand name representing Japanese electric products manufactured by Matsushita Electric Industrial Co. This company employs workers who create and improve their plasma display panels, digital cameras, DVD players, and laptop computers. At Philips Electronics Canada, competitive salaries are offered for their positions, including a place as a Consumer Electronics Regional Sales Manager. Additional companies offering worthy job opportunities in the electronics field include IBM, Siemens, and Toshiba.
Common Electronics Careers and Jobs
Electronics engineers are responsible for an array of technologies that span portable music players to global positioning systems (GPS). Many electronics engineers also work closely with computers and other electronic equipment. A variety of skills are associated with this type of job position, which deals with communications, control systems, and signal processing. Usually, a specialty is attached to the title of electronics engineer. An example of this is seen in the aviation electronics engineer that works for the military. There are also analysts in this field, such as the Airborne Electronics Analyst in charge of controlling airborne electronic systems that identify ships and submarines. They also help with vital search and rescue operations.
As a Level I Electronics Assembler, one puts together electronics to match product specifications. A high school diploma or its equivalent is required for this type of job, where 0 to 3 years of experience in the field is a plus. An Electronics Assembler should possess knowledge on commonly-used concepts, practices, and procedures pertaining to their assigned product, as well as possess the ability to follow instructions and pre-set guidelines. Immediate supervision generally watches over worker progress. Usually, reports are made to supervisors or managers. The average salary for an Electronics Assembler is between $22,493 and $29,738.
As a Level I Electric/Electronics Technician, workers construct, maintain, and test electrical systems and their components. A high school diploma or its equivalent is needed for this type of job, where the completion of an apprenticeship and/or formal specialty training will elevate salaries and lead to more job opportunities. An electronic technician may tackle numerous jobs, such as the service and repair of both household and business electronic equipment. This may include radios, televisions and computers. Sometimes, employees are situated within a specific field, such as serving the medical, manufacturing, military, or telecommunications sector. An Electric/Electronics Technician I usually makes between $33,097 and $40,342, while an Electric/Electronics Technician III may earn between $49,269 and $61,874.
Home electronics repairers showcase their talents as installers and repairers of televisions, stereos, video cameras, as well as DVD and CD players. Those who work in shops are called bench technicians, while the repairer that visits the home is referred to as a field technician. Common duties include installing and tuning equipment to achieve the best sound or visual output; replacing faulty parts; and making service calls.
Educational Requirements: Electronics Career
The preparation for a career in electronics begins in high school, as a strong foundation in science and mathematics helps individuals pursue this type of job. Students in high school should focus on taking courses, such a physics and chemistry. Some positions also require advanced written and oral skills. Higher education paths associated with entering the electronics field include receiving a Bachelor of Science or an associates degree. Some of the college courses you may encounter include information on circuits, linear systems, electromagnetic fields, and computing.
Working in Electronics: United States & Canada
When it comes to working in the electronics industry, there are many different companies with a reputation for providing satisfying compensation and benefits throughout the United States and Canada. For starters, Microsoft is known for providing some of the best compensation and benefits for their employees, who work in a variety of positions, such as electronics engineers and electronic design engineers. Texas Instruments also pays their employees well, as an electrical design engineer stands to make an annual average salary of $109,223.
Panasonic is the international brand name representing Japanese electric products manufactured by Matsushita Electric Industrial Co. This company employs workers who create and improve their plasma display panels, digital cameras, DVD players, and laptop computers. At Philips Electronics Canada, competitive salaries are offered for their positions, including a place as a Consumer Electronics Regional Sales Manager. Additional companies offering worthy job opportunities in the electronics field include IBM, Siemens, and Toshiba.
Article Source: http://EzineArticles.com/?expert=Fei_Lim
Wholesale Electronics
Wholesale electronics offers resellers high profit margins along with high volume sales, when done right.
Resellers, whether flea market vendors, eBay sellers, or dollar stores, will be faced with competition from online and offline retailers who can buy wholesale electronics at a lower price.
To outmaneuver this competition in the wholesale electronics business, resellers need to have a strategic plan in place.
Part one of their plan deals with finding the best sources for wholesale electronics at the lowest possible prices.
For this reason I would recommend resellers to stay away from drop shippers when looking for wholesale electronics.
Since the drop shipper is set up to offer his products to thousands of other resellers, you will not be able to compete based on price. All the resellers are paying the same price to the wholesale electronic drop shipper, so how can your prices be lower?
When looking to buy wholesale electronics you want to get as close to the source as possible.
Since you will not be able to buy brand name wholesale electronics for a lower price than major retailers can, you will want to look for lesser known wholesale electronic sellers.
For instance, ABC Electronics might not have the name recognition that Sharp enjoys, but you can show customers that the quality is the same, and as long as your prices are lower some customers should buy the wholesale electronics manufactured by ABC Electronics.
When you contact these companies looking for wholesale electronics ask them for their overstock, overrun, and closeout deals. You would be surprised at the wholesale electronics deals you can find from small manufacturers that are looking to move merchandise out.
You can find great wholesale electronics deals but it will take some solid leg work.
Donny Lowy is the CEO of http://www.closeoutexplosion.com, an online wholesale and closeout business, and http://www.wholesalecloseoutforum.com, an educational site for the wholesale and closeout business.
Article Source: http://EzineArticles.com/?expert=Donny_Lowy
Resellers, whether flea market vendors, eBay sellers, or dollar stores, will be faced with competition from online and offline retailers who can buy wholesale electronics at a lower price.
To outmaneuver this competition in the wholesale electronics business, resellers need to have a strategic plan in place.
Part one of their plan deals with finding the best sources for wholesale electronics at the lowest possible prices.
For this reason I would recommend resellers to stay away from drop shippers when looking for wholesale electronics.
Since the drop shipper is set up to offer his products to thousands of other resellers, you will not be able to compete based on price. All the resellers are paying the same price to the wholesale electronic drop shipper, so how can your prices be lower?
When looking to buy wholesale electronics you want to get as close to the source as possible.
Since you will not be able to buy brand name wholesale electronics for a lower price than major retailers can, you will want to look for lesser known wholesale electronic sellers.
For instance, ABC Electronics might not have the name recognition that Sharp enjoys, but you can show customers that the quality is the same, and as long as your prices are lower some customers should buy the wholesale electronics manufactured by ABC Electronics.
When you contact these companies looking for wholesale electronics ask them for their overstock, overrun, and closeout deals. You would be surprised at the wholesale electronics deals you can find from small manufacturers that are looking to move merchandise out.
You can find great wholesale electronics deals but it will take some solid leg work.
Donny Lowy is the CEO of http://www.closeoutexplosion.com, an online wholesale and closeout business, and http://www.wholesalecloseoutforum.com, an educational site for the wholesale and closeout business.
Article Source: http://EzineArticles.com/?expert=Donny_Lowy
Electronics Show Influences Still Reverberating
The CES (International Consumer Electronics Show) for this year may be over, but its after effects are still reverberating around the blogosphere and beyond. Electronic giants, Media conglomerates, Satellite Television Companies, HDTV (High Definition Television) manufacturers and everyone else in the digital universe attend the CES. The CES is the premier location for them to show their wares. How we sit on the cusp of the transition from an analog to a digital world was one of the big topics explored this year. From the popularity of all-digital Satellite Television, digital video cameras and the newest digital televisions, we see proof that the transition is very real. Monumental changes are happening in the entertainment world. Mobile TV or streaming video on the handset or cellular phone was another one of the stars at the CES.
Another topic was the fact that consumers are purchasing, recording, saving, using, moving and creating more of all types of digital media. The emerging digital lifestyle is changing all of the time and one way that companies try to get a handle on this shifting universe is doing research. One small, but very important method, is for the experts to actually come to your home! They call it Environmental Observation Research. They come to your home (with permission) and bring digital video cameras and watch you interacting with your digital stuff! They also conduct interviews and in general snoop around and try to discover all that they can about the home entertainment habits of consumers. Anthropologists call this ethnographic research and they do the same thing, except that they stay around for a year or two.
Some experts in the industry are worried that consumers are falling behind in their knowledge of the new technologies. For example, many consumers confused HD television with Digital Television. Some erroneously thought that HDTV was coming in about two years. Plasma television was also a source of confusion for some—one consumer thought that he would have to spend 20,000 dollars to get a plasma set. Most consumers knew little to nothing about DVR technology (Digital Video Recorders). After they were told that DVR’s allow you to record and pause live television and replace and improve the old VCR technology, they could readily understand it. However, this research underscored the lack of information in large segments of the population. Interestingly, the researchers found out that every household has an unofficial IT manager, and they are the go-to person when someone in the family needs help and information on a new topic or device. I just bet you are the IT expert in your home, aren’t you?
One of the largest lessons from the CEA: Back up your digital memories, files, photos, and videos… And do it now! This is a poorly understood and poorly actualized area. Most consumers just aren’t aware of the importance of backing up, and furthermore they don’t know the technologies to back up their files, such as burning data discs, having copies at other locations, and storing their information on the Internet. Do not lose those precious videos!
You will find only the best Dish Network deals in L. Dixon's articles. Check back frequently for new submissions from Dixon about new technology and how you can find the best Dish Network Promotions for your home and family.
Article Source: http://EzineArticles.com/?expert=Larry_Dixon
Another topic was the fact that consumers are purchasing, recording, saving, using, moving and creating more of all types of digital media. The emerging digital lifestyle is changing all of the time and one way that companies try to get a handle on this shifting universe is doing research. One small, but very important method, is for the experts to actually come to your home! They call it Environmental Observation Research. They come to your home (with permission) and bring digital video cameras and watch you interacting with your digital stuff! They also conduct interviews and in general snoop around and try to discover all that they can about the home entertainment habits of consumers. Anthropologists call this ethnographic research and they do the same thing, except that they stay around for a year or two.
Some experts in the industry are worried that consumers are falling behind in their knowledge of the new technologies. For example, many consumers confused HD television with Digital Television. Some erroneously thought that HDTV was coming in about two years. Plasma television was also a source of confusion for some—one consumer thought that he would have to spend 20,000 dollars to get a plasma set. Most consumers knew little to nothing about DVR technology (Digital Video Recorders). After they were told that DVR’s allow you to record and pause live television and replace and improve the old VCR technology, they could readily understand it. However, this research underscored the lack of information in large segments of the population. Interestingly, the researchers found out that every household has an unofficial IT manager, and they are the go-to person when someone in the family needs help and information on a new topic or device. I just bet you are the IT expert in your home, aren’t you?
One of the largest lessons from the CEA: Back up your digital memories, files, photos, and videos… And do it now! This is a poorly understood and poorly actualized area. Most consumers just aren’t aware of the importance of backing up, and furthermore they don’t know the technologies to back up their files, such as burning data discs, having copies at other locations, and storing their information on the Internet. Do not lose those precious videos!
You will find only the best Dish Network deals in L. Dixon's articles. Check back frequently for new submissions from Dixon about new technology and how you can find the best Dish Network Promotions for your home and family.
Article Source: http://EzineArticles.com/?expert=Larry_Dixon
Electronic Locks - Revolutionizing The World Of Door Locks
You are not safe behind locked doors. Yes, you definitely aren’t. With thieves and burglars getting hold of every possible way to get past doors locked with the conventional mechanical locks, locked doors aren’t safe enough anymore. A simple twist and the conventional locks give way. But now there is hope, and it has found the form of a great new technology – Electronic Locks. An electronic lock, as the name suggests, is a device using a certain form of electronics to authenticate the identity of every person it. Electronic locks are more secure than conventional mechanical locks. Electronic locks are definitely a step ahead of conventional mechanical locks with regards the level of safety offered. Electronic locks provide many advantages over conventional locks which can be aptly termed to be “electronic lock services”. For example, electronic locks offer a log of successful attempts in getting past them, as also a log of failed attempts of sneaking through them.
Electronic locks can be used almost everywhere. Unlike conventional locks, electronic locks come in a variety of shapes and sizes. The best application of an electronic lock is to use one as a door lock. Electronic door locks are undoubtedly the best amongst all alternatives available today. Electronic door locks, like a lot of electronic lock have a magnetic lock to use it manually. Also prevalent is the use of other older mechanisms which often use an electronic motor to move a deadbolt. Electronic lock services require providing electrical currents to the lock. Providing electrical currents to a lock within a door can be difficult. Hence a common solution to this is a use of an electronic strike plate.
Electronic door locks score over other mechanical locks due to the fact that electronic locks provide a variety of means of authentication such as the use of Numerical codes, passwords and pass phrases, Security tokens, Biometrics etc. An electronic lock service using numerical codes for authentication is the most prevalent form of electronic locking. In these kinds of electronic locking services, the correct code must be entered in order for the electronic door lock to deactivate. These kinds of electronic lock services typically provide a keypad, and some electronic door locks also feature an audible response to each press. Combination lengths are usually between 4 and 6 digits long. The larger the combination, the stronger is your electronic door lock. Electronic lock services are also available with a slight variation to the above. The variation on this design involves the user entering the correct password or a pass phrase to deactivate the electronic lock.
Another means of authenticating users used in electronic locks is to require them to scan or "swipe" a security token such as a smart card or similar, or to interact a token with the lock. Biometric electronic lock services are the latest in electronic door lock systems. Such electronic locks use features such as scanning of fingers, fingerprint scanning, eye scanning, and security features such as voice recognition etc to authenticate users.
David Jones - Security expert. Working in NY City, for http://www.VertexSecurity.com, Providing a wide range of products and services evolving Security cameras, high-end electronic locks, and all types of security systems.
Article Source: http://EzineArticles.com/?expert=Ryan_Richards
Electronic locks can be used almost everywhere. Unlike conventional locks, electronic locks come in a variety of shapes and sizes. The best application of an electronic lock is to use one as a door lock. Electronic door locks are undoubtedly the best amongst all alternatives available today. Electronic door locks, like a lot of electronic lock have a magnetic lock to use it manually. Also prevalent is the use of other older mechanisms which often use an electronic motor to move a deadbolt. Electronic lock services require providing electrical currents to the lock. Providing electrical currents to a lock within a door can be difficult. Hence a common solution to this is a use of an electronic strike plate.
Electronic door locks score over other mechanical locks due to the fact that electronic locks provide a variety of means of authentication such as the use of Numerical codes, passwords and pass phrases, Security tokens, Biometrics etc. An electronic lock service using numerical codes for authentication is the most prevalent form of electronic locking. In these kinds of electronic locking services, the correct code must be entered in order for the electronic door lock to deactivate. These kinds of electronic lock services typically provide a keypad, and some electronic door locks also feature an audible response to each press. Combination lengths are usually between 4 and 6 digits long. The larger the combination, the stronger is your electronic door lock. Electronic lock services are also available with a slight variation to the above. The variation on this design involves the user entering the correct password or a pass phrase to deactivate the electronic lock.
Another means of authenticating users used in electronic locks is to require them to scan or "swipe" a security token such as a smart card or similar, or to interact a token with the lock. Biometric electronic lock services are the latest in electronic door lock systems. Such electronic locks use features such as scanning of fingers, fingerprint scanning, eye scanning, and security features such as voice recognition etc to authenticate users.
David Jones - Security expert. Working in NY City, for http://www.VertexSecurity.com, Providing a wide range of products and services evolving Security cameras, high-end electronic locks, and all types of security systems.
Article Source: http://EzineArticles.com/?expert=Ryan_Richards
Saturday, October 27, 2007
What are the best features of a portable DVD player?
A great movie can make a long trip go by very easily, especially when flying. Often however, the movie you watch on the small screen at the front of your cabin is edited and interrupted by announcements from the crew about dinner. Have you ever considered taking a portable DVD player with you? With one of these and a good set of headphones, you can enjoy that action flick while everyone else is stuck hearing about the Grand Canyon. Check out our list of recommended features below to help you choose the best portable DVD player.
* Dimensions A portable DVD player can end up feeling like a small brick to some, especially those which have large rechargeable batteries attached to them. While all players tend to run small, weight can vary by several pounds so make sure to check the side of the box before you buy.
* Disc Formats Supported Besides playing standard DVDs, many portable players today can double as CD players as well, eliminating the need to take one extra device on your trip.
* You should also consider seeing if your player can support CD-R,CD-RW or DVD-R as well, as these do-it-yourself disc formats are becoming popular amongst those who have burners at home.
* Outputs One of the great things about portable DVD players is that they can substitute for regular size cousins on the fly when you need to plug into your home entertainment system. You'll want to consider a player which has high quality outputs, such as S-Video for video and Optical Out for audio, so you can get the best quality playback possible.
* Screen Many players today come with built-in screens, which make it the ultimate DVD entertainment device for the road. While screen size varies somewhat, larger is definitely better. You should expect to pay a higher price however. If you are looking for budget, you can also consider a player without a screen, though you'll need to make sure you have something you can hook it up to so you can watch your movie.
* Virtual Surround Sound For those times when you don't have the ability to hook your DVD player up to a home entertainment system, consider a model which has virtual surround sound. This neat feature enhances the sound quality of the movie, giving it a more realistic edge.
Now that you have down the basics about what makes a great portable DVD player, put your skills to the test by browsing our Top Portable DVD Player picks and choosing the player which best fits your needs.
http://portables.about.com/cs/portabledvd/f/portdvdbg.htm
* Dimensions A portable DVD player can end up feeling like a small brick to some, especially those which have large rechargeable batteries attached to them. While all players tend to run small, weight can vary by several pounds so make sure to check the side of the box before you buy.
* Disc Formats Supported Besides playing standard DVDs, many portable players today can double as CD players as well, eliminating the need to take one extra device on your trip.
* You should also consider seeing if your player can support CD-R,CD-RW or DVD-R as well, as these do-it-yourself disc formats are becoming popular amongst those who have burners at home.
* Outputs One of the great things about portable DVD players is that they can substitute for regular size cousins on the fly when you need to plug into your home entertainment system. You'll want to consider a player which has high quality outputs, such as S-Video for video and Optical Out for audio, so you can get the best quality playback possible.
* Screen Many players today come with built-in screens, which make it the ultimate DVD entertainment device for the road. While screen size varies somewhat, larger is definitely better. You should expect to pay a higher price however. If you are looking for budget, you can also consider a player without a screen, though you'll need to make sure you have something you can hook it up to so you can watch your movie.
* Virtual Surround Sound For those times when you don't have the ability to hook your DVD player up to a home entertainment system, consider a model which has virtual surround sound. This neat feature enhances the sound quality of the movie, giving it a more realistic edge.
Now that you have down the basics about what makes a great portable DVD player, put your skills to the test by browsing our Top Portable DVD Player picks and choosing the player which best fits your needs.
http://portables.about.com/cs/portabledvd/f/portdvdbg.htm
True vs 'PMPO' Power
1 Introduction
The term '''audio power''' is used in the specification or measurement of audio amplifiers or loudspeakers. A meaningful and reliable measure of the power output of an audio amplifier, or the power handling of a loudspeaker is ''continuous sine wave power'', or more strictly 'continuous average sine wave power'. Such a figure will often be found in advertising literature referred to as "true RMS power", but this is quite incorrect. Although there is such a thing as RMS (root mean square) power, it is neither useful as a measurement nor what is intended by those who use the term. The sine wave power is found by averaging the instantaneous power output over a long period of time (or one complete cycle), so it is actually the ''average power'' or ''mean power''. The term RMS is used mistakenly due to the fact that the mean power is calculated from the RMS voltage and current (or one of them and the impedance); power being proportional to the square of voltage or current.
2 ‘Music Power' - the Real Issues
The term ''"Music Power"'' has been used in relation to both amplifiers and loudspeakers with some validity. When live music is recorded without amplitude compression or limiting, the resulting signal contains brief peaks of very much higher amplitude (20 dB or more) than the mean, and since power is proportional to the square of signal voltage their reproduction would require an amplifier capable of providing brief peaks of power around a hundred times greater than the average level. Thus the ideal 100-watt audio system would be capable of handling brief peaks of 10,000 watts in order to avoid clipping (see Programme levels). Most loudspeakers are in fact capable of handling peaks of several times their continuous rating (though not a hundred times!), since thermal inertia prevents the voice coils from burning out on short bursts. It is therefore acceptable, and desirable, to drive a loudspeaker from a power amplifier with a higher continuous rating several times that of the speaker, but only if care is taken not to overheat it, which is difficult, especially on modern recordings which tend to be heavily compressed and so can be played at high levels without the obvious distortion that would result from a 'real' recording when the amplifier started clipping.
Music power is a less valid term when applied to most amplifiers. Most power amplifiers can give more output on brief bursts than their continuous rated output, but not usually to an extent that is relevant in the context of the above. There are three reasons for the enhanced short-burst power.
Most amplifiers do not have regulated power supplies but rely on a full-wave rectifier and large smoothing capacitor to provide a reasonably steady supply voltage. This charges to its peak voltage on quiet passages where little current is being drawn, but 'sags' to around 10% less under heavy current demand. Since 10% voltage drop corresponds to 20% power drop, the steady-state power output of the amplifier, which has to be quoted is always some 20% lower than the brief power capability. A 100-watt amplifier is therefore likely to handle brief peaks of up to 120 W without clipping. This might sound good in a specification, but it should be noted that it is only 1 dB, which is a change in level not usually even detectable by the human hearing system! It is also usually only available for some 10 milliseconds, which is too short to be of much benefit in real programme material. The term peak music power, in this context, is of no real significance.
It is possible to take a cost-effective approach to power amp design by reducing the size of the heat sinks on the output devices below that needed to avoid overheating on continuous sine wave drive at maximum output. Such an approach was once valid, as it recognised that fact that on 'real' recordings there is no need to provide for continuous full output as the gross distortion caused by clipping on brief peaks will result in the user turning down the volume before damage is done. On modern amplifiers it is possible to take such an approach without risk of damage, using integrated amplifier chips, which tend to incorporate 'thermal protection'. However, the trend towards heavy compression and limiting on commercial recordings in recent years means that people expect to play these at high volume without clipping, and so the validity of the 'peak music power' approach to amplifier design has mostly been removed.
While the above is true for most 'domestic' amplifiers, it need not be so, especially in relation to monitoring, and uncompressed reproduction. Some professional amplifiers, and 'active' speakers, incorporate sophisticated electronic thermal protection circuits which integrate the power delivered to the speaker and take account of its thermal capacity properly. This enables them to handle peak power levels safely while limiting the continuous power that can be applied in a way that makes sense.
3 Power Handling in 'Active' Speakers
Active speakers often use two or three power amplifiers, each handling only part of the audio frequency spectrum. The main benefit of this approach is that it enables complicated crossover filters to be used on the low level signal, and eliminates the bulky and awkward inductors and capacitors normally used in crossover networks. There is, however, another big advantage that is not usually recognised. When two tones are reproduced simultaneously, a single amplifier normally has to handle the peak power that results when both are at their crest. Because of the square-law relationship, this means that two tones each generating 10 watts result in a power handling requirement of 40 watts. With multiple amplifiers, the two tones can be handles separately, by 10 watt amps. Thus a 'bi-amped' system can handle peaks of up to twice the combined rating of its amplifiers, and a 'tri-amped' system, on three tones, gains even more! This is of course because the signal has a high 'crest factor'. In practice, music peaks often consist of percussion riding on top of bass notes, and so the benefit is very real, as these are each always handled separately. This is a benefit that would cost a lot to realise if the single amplifier approach were taken, making 'bi-amping' a very cost-effective approach.
4 US Market Regulations
In the US on May 3, 1974, the Amplifier Rule CFR 16 Part 432 (39 FR 15387) was instated by the Federal Trade Commission (FTC) requiring audio power and distortion ratings for home entertainment equipment to be measured in a defined manner with power stated in RMS terms. This rule was amended in 1998 to cover self-powered speakers such as are commonly used with personal computers (see examples below). This regulation did not cover automobile entertainment systems, which consequently still suffer from power ratings confusion. However, a new regulation called CEA 2006 includes car electronics, and is being phased into the market as slowly as possible by many manufacturers.
Unfortunately there are no similar laws in much of the rest of the world.
http://www.lindos.co.uk/cgi-bin/FlexiData.cgi?SOURCE=Articles&VIEW=full&id=15
The term '''audio power''' is used in the specification or measurement of audio amplifiers or loudspeakers. A meaningful and reliable measure of the power output of an audio amplifier, or the power handling of a loudspeaker is ''continuous sine wave power'', or more strictly 'continuous average sine wave power'. Such a figure will often be found in advertising literature referred to as "true RMS power", but this is quite incorrect. Although there is such a thing as RMS (root mean square) power, it is neither useful as a measurement nor what is intended by those who use the term. The sine wave power is found by averaging the instantaneous power output over a long period of time (or one complete cycle), so it is actually the ''average power'' or ''mean power''. The term RMS is used mistakenly due to the fact that the mean power is calculated from the RMS voltage and current (or one of them and the impedance); power being proportional to the square of voltage or current.
2 ‘Music Power' - the Real Issues
The term ''"Music Power"'' has been used in relation to both amplifiers and loudspeakers with some validity. When live music is recorded without amplitude compression or limiting, the resulting signal contains brief peaks of very much higher amplitude (20 dB or more) than the mean, and since power is proportional to the square of signal voltage their reproduction would require an amplifier capable of providing brief peaks of power around a hundred times greater than the average level. Thus the ideal 100-watt audio system would be capable of handling brief peaks of 10,000 watts in order to avoid clipping (see Programme levels). Most loudspeakers are in fact capable of handling peaks of several times their continuous rating (though not a hundred times!), since thermal inertia prevents the voice coils from burning out on short bursts. It is therefore acceptable, and desirable, to drive a loudspeaker from a power amplifier with a higher continuous rating several times that of the speaker, but only if care is taken not to overheat it, which is difficult, especially on modern recordings which tend to be heavily compressed and so can be played at high levels without the obvious distortion that would result from a 'real' recording when the amplifier started clipping.
Music power is a less valid term when applied to most amplifiers. Most power amplifiers can give more output on brief bursts than their continuous rated output, but not usually to an extent that is relevant in the context of the above. There are three reasons for the enhanced short-burst power.
Most amplifiers do not have regulated power supplies but rely on a full-wave rectifier and large smoothing capacitor to provide a reasonably steady supply voltage. This charges to its peak voltage on quiet passages where little current is being drawn, but 'sags' to around 10% less under heavy current demand. Since 10% voltage drop corresponds to 20% power drop, the steady-state power output of the amplifier, which has to be quoted is always some 20% lower than the brief power capability. A 100-watt amplifier is therefore likely to handle brief peaks of up to 120 W without clipping. This might sound good in a specification, but it should be noted that it is only 1 dB, which is a change in level not usually even detectable by the human hearing system! It is also usually only available for some 10 milliseconds, which is too short to be of much benefit in real programme material. The term peak music power, in this context, is of no real significance.
It is possible to take a cost-effective approach to power amp design by reducing the size of the heat sinks on the output devices below that needed to avoid overheating on continuous sine wave drive at maximum output. Such an approach was once valid, as it recognised that fact that on 'real' recordings there is no need to provide for continuous full output as the gross distortion caused by clipping on brief peaks will result in the user turning down the volume before damage is done. On modern amplifiers it is possible to take such an approach without risk of damage, using integrated amplifier chips, which tend to incorporate 'thermal protection'. However, the trend towards heavy compression and limiting on commercial recordings in recent years means that people expect to play these at high volume without clipping, and so the validity of the 'peak music power' approach to amplifier design has mostly been removed.
While the above is true for most 'domestic' amplifiers, it need not be so, especially in relation to monitoring, and uncompressed reproduction. Some professional amplifiers, and 'active' speakers, incorporate sophisticated electronic thermal protection circuits which integrate the power delivered to the speaker and take account of its thermal capacity properly. This enables them to handle peak power levels safely while limiting the continuous power that can be applied in a way that makes sense.
3 Power Handling in 'Active' Speakers
Active speakers often use two or three power amplifiers, each handling only part of the audio frequency spectrum. The main benefit of this approach is that it enables complicated crossover filters to be used on the low level signal, and eliminates the bulky and awkward inductors and capacitors normally used in crossover networks. There is, however, another big advantage that is not usually recognised. When two tones are reproduced simultaneously, a single amplifier normally has to handle the peak power that results when both are at their crest. Because of the square-law relationship, this means that two tones each generating 10 watts result in a power handling requirement of 40 watts. With multiple amplifiers, the two tones can be handles separately, by 10 watt amps. Thus a 'bi-amped' system can handle peaks of up to twice the combined rating of its amplifiers, and a 'tri-amped' system, on three tones, gains even more! This is of course because the signal has a high 'crest factor'. In practice, music peaks often consist of percussion riding on top of bass notes, and so the benefit is very real, as these are each always handled separately. This is a benefit that would cost a lot to realise if the single amplifier approach were taken, making 'bi-amping' a very cost-effective approach.
4 US Market Regulations
In the US on May 3, 1974, the Amplifier Rule CFR 16 Part 432 (39 FR 15387) was instated by the Federal Trade Commission (FTC) requiring audio power and distortion ratings for home entertainment equipment to be measured in a defined manner with power stated in RMS terms. This rule was amended in 1998 to cover self-powered speakers such as are commonly used with personal computers (see examples below). This regulation did not cover automobile entertainment systems, which consequently still suffer from power ratings confusion. However, a new regulation called CEA 2006 includes car electronics, and is being phased into the market as slowly as possible by many manufacturers.
Unfortunately there are no similar laws in much of the rest of the world.
http://www.lindos.co.uk/cgi-bin/FlexiData.cgi?SOURCE=Articles&VIEW=full&id=15
Friday, October 26, 2007
Videogame Systems Top 'Planned Gift' Lists This Year
According to research by the Consumer Electronics Association, sales of consumer electronics are expected to top $22 billion this holiday season, with videogame systems topping the list of gifts people intend to give to others. Though consumers are expected to cut down on expenses like home decorations and travel, they'll still be spending plenty on gifts.
http://powerelectronics.com/power_systems/
Not surprisingly, videogames made the top five most wanted items for teens, along with clothes, computers, MP3 players, and cell phones. Adults who were hoping to get some kind of electronic gizmo for the holidays put game systems on their wish list beside MP3 players, laptops, TVs, and digital cameras.
http://powerelectronics.com/power_systems/
Thursday, October 25, 2007
Wear your electronics
An electronic revolution could be on the way with the development of a thin film of plastic that conducts electricity and produces solar power, changing the way we light our homes and design clothes.
An international research project has begun that could bring organic light emitting devices (OLEDs) to the mass market.
The devices are thin and flexible, which means that lighting and electronic display screens could be created on almost any material, so that clothes and packaging can display electronic information.
The devices' uses vary from lighting that is more efficient than current bulbs to clothes which change colour at the press of a button and beer cans that display the latest football results.
At present, the devices are used as displays in some mobile phones and MP3 players, but they are not reliable enough for larger screens such as TVs and computers as they stop working after a few months.
"Their use in large televisions, clothes, lighting etc is longer term: 1-3 years away for televisions; 2-5 years for clothes; maybe 5-10 years for lighting and large displays," Dr Alison Walker of the British University of Bath's Department of Physics said.
An international consortium of researchers, led by the university, has begun a three-year project to put the science behind the devices on a firmer basis, so helping make them efficient enough to be mass produced.
The consortium, called Modecom, consists of 13 groups from nine universities and two companies. Three groups are from Britain, six from the US and one each from China, Belgium, Italy and Denmark.
"The consortium is funded by the European Commission," Walker said.
"Modecom's output is primarily scientific and will be published in the open literature and presented at international conferences so will be accessible to Australian researchers."
The devices make use of a discovery made 15 years ago that some polymers have the property of either turning electricity into light, or light into electricity, depending on how the devices are made.
Because these polymers are thin and flexible, they could be used in a multiplicity of ways:
*
As a transparent window. This is like a conventional window during the day, but when it gets dark a switch is turned on and the entire window area emits light in a more efficient way than conventional or energy-saving bulbs, promising huge savings;
*
In clothing which displays strips of the polymer which run off solar power, allowing electronic messages to be displayed which can be updated. This could be useful for the emergency services;
*
In packaging for common goods that could be made to display electronic messages such as health warnings and recipes or could emit light;
*
As a source of solar power to top up mobile phone batteries;
*
As lightweight, solar power sources that could be rolled up and stored and which would also be suitable for people requiring electricity in remote locations, such as field researchers, mountaineers, sailors and military personnel.
However, Walker doesn't think this technology will replace traditional solar power sources as they are very inefficient.
Their key advantage is cost: they are cheap and their energy cost in manufacture would also be low, so the devices themselves will cost a few cents. They are also portable and flexible so their main use would be to replace batteries that, according to Walker, could happen in 5-10 years.
Walker goes on to say, the main thing holding the technology back is efficiency and degradation for displays, lighting and clothing and for solar cells, efficiency, then degradation.
The polymer is made from chains of molecules, and is called organic because they contain carbon. Electrons and holes injected into the polymer film form bound states called excitons that break down under electrical current, emitting light as they do so.
Walker's part of the consortium's research uses a mathematical technique called Monte Carlo analysis in which computer-generated random numbers are used to plot the paths of electrons, holes and excitons as they move across the film.
The results from this can be used to calculate how the chemical structure and impurities affect the device's performance. Chemists can use this data to design more efficient materials.
The Modecom consortium will work on the molecular level and also look at the workings of the device as a whole. This research will aid the understanding of the polymer materials used in plastic electronics in applications such as electronic paper and intelligent labels on groceries.
http://www.electroline.com.au/feature_article/article.asp?item=1319
An international research project has begun that could bring organic light emitting devices (OLEDs) to the mass market.
The devices are thin and flexible, which means that lighting and electronic display screens could be created on almost any material, so that clothes and packaging can display electronic information.
The devices' uses vary from lighting that is more efficient than current bulbs to clothes which change colour at the press of a button and beer cans that display the latest football results.
At present, the devices are used as displays in some mobile phones and MP3 players, but they are not reliable enough for larger screens such as TVs and computers as they stop working after a few months.
"Their use in large televisions, clothes, lighting etc is longer term: 1-3 years away for televisions; 2-5 years for clothes; maybe 5-10 years for lighting and large displays," Dr Alison Walker of the British University of Bath's Department of Physics said.
An international consortium of researchers, led by the university, has begun a three-year project to put the science behind the devices on a firmer basis, so helping make them efficient enough to be mass produced.
The consortium, called Modecom, consists of 13 groups from nine universities and two companies. Three groups are from Britain, six from the US and one each from China, Belgium, Italy and Denmark.
"The consortium is funded by the European Commission," Walker said.
"Modecom's output is primarily scientific and will be published in the open literature and presented at international conferences so will be accessible to Australian researchers."
The devices make use of a discovery made 15 years ago that some polymers have the property of either turning electricity into light, or light into electricity, depending on how the devices are made.
Because these polymers are thin and flexible, they could be used in a multiplicity of ways:
*
As a transparent window. This is like a conventional window during the day, but when it gets dark a switch is turned on and the entire window area emits light in a more efficient way than conventional or energy-saving bulbs, promising huge savings;
*
In clothing which displays strips of the polymer which run off solar power, allowing electronic messages to be displayed which can be updated. This could be useful for the emergency services;
*
In packaging for common goods that could be made to display electronic messages such as health warnings and recipes or could emit light;
*
As a source of solar power to top up mobile phone batteries;
*
As lightweight, solar power sources that could be rolled up and stored and which would also be suitable for people requiring electricity in remote locations, such as field researchers, mountaineers, sailors and military personnel.
However, Walker doesn't think this technology will replace traditional solar power sources as they are very inefficient.
Their key advantage is cost: they are cheap and their energy cost in manufacture would also be low, so the devices themselves will cost a few cents. They are also portable and flexible so their main use would be to replace batteries that, according to Walker, could happen in 5-10 years.
Walker goes on to say, the main thing holding the technology back is efficiency and degradation for displays, lighting and clothing and for solar cells, efficiency, then degradation.
The polymer is made from chains of molecules, and is called organic because they contain carbon. Electrons and holes injected into the polymer film form bound states called excitons that break down under electrical current, emitting light as they do so.
Walker's part of the consortium's research uses a mathematical technique called Monte Carlo analysis in which computer-generated random numbers are used to plot the paths of electrons, holes and excitons as they move across the film.
The results from this can be used to calculate how the chemical structure and impurities affect the device's performance. Chemists can use this data to design more efficient materials.
The Modecom consortium will work on the molecular level and also look at the workings of the device as a whole. This research will aid the understanding of the polymer materials used in plastic electronics in applications such as electronic paper and intelligent labels on groceries.
http://www.electroline.com.au/feature_article/article.asp?item=1319
Wednesday, October 24, 2007
A Helmet Camera Captures All of Your Daring Feats
If the spirit of adventure runs through your veins, a helmet camera can help you capture all of your daring feats, whether for motocross, flying, ATV, road racing, kayaking, skydiving, cycling, snowboarding, karting, or other adrenalin-pumping sports.
Helmet cams give you the capability to record every moment of the action without depending on an outside cameraperson. These action video cameras are popular with television and movie recordings as well as daredevil athletes, and now you can record your feats just like the pros! You can show the recording to your friends, and they can imagine being there with you on every twist and turn.
What is a Helmet Camera?
A helmet camera is a very small type of camcorder that can be attached to a protective helmet to record all the action while doing extreme sports activities. It can also be used for more relaxed sports such as fishing, golf, hiking, and biking. Helmet cameras are also called helmet cam, bullet cam or bullet camera, lipstick cam or lipstick camera (resembles a tube of lipstick), or wireless helmet camera.
A helmet camera works in conjunction with a DVR (DVD video recorder) and can be played back again and again for your enjoyment.
Benefits of Helmet Cams
Helmet cams provide hands-free recording during your extreme sports activity. This promotes safety and easy use. You won't have to worry about holding the camera or adjusting it as you go. You can concentrate on the activity and still capture all the details without distraction. Also, you can record sound with a helmet camera and narrate the activity as you go. If you're participating in an extreme sporting competition, you can record every moment as a keepsake for years to come.
Buying Helmet Cameras
When you get ready to buy a helmet camera, check online for a dependable retailer. You can always find great deals on quality lipstick cameras with all the accessories to go along. Search for helmet or bullet camera reviews to find good quality products. Also, check for sound quality, durability, and features before buying. Sometimes paying a little more is well worth it if you get a better quality helmet camera. There are affordable, high-quality cameras available online such as the Oregon Scientific ATC-2000 action adventure cam.
Tips for Using Helmet Cameras
Once you buy a helmet camera, take time to study on how to use it properly. Be sure the helmet cam has been properly secured before starting your activity. High speeds, bumps, and falls can cause the helmet camera to become lost or broken if you don't secure it properly. The camera's cable should also be secured so that it doesn't flap in the wind. Take quick breaks to check the lens to make sure it's clean if you're out on the road or in the dirt, water, or mud. Also, be sure the camera is actually recording before getting started!
http://www.majon.com/articles/Electronics/helmet_camera_719.html
Helmet cams give you the capability to record every moment of the action without depending on an outside cameraperson. These action video cameras are popular with television and movie recordings as well as daredevil athletes, and now you can record your feats just like the pros! You can show the recording to your friends, and they can imagine being there with you on every twist and turn.
What is a Helmet Camera?
A helmet camera is a very small type of camcorder that can be attached to a protective helmet to record all the action while doing extreme sports activities. It can also be used for more relaxed sports such as fishing, golf, hiking, and biking. Helmet cameras are also called helmet cam, bullet cam or bullet camera, lipstick cam or lipstick camera (resembles a tube of lipstick), or wireless helmet camera.
A helmet camera works in conjunction with a DVR (DVD video recorder) and can be played back again and again for your enjoyment.
Benefits of Helmet Cams
Helmet cams provide hands-free recording during your extreme sports activity. This promotes safety and easy use. You won't have to worry about holding the camera or adjusting it as you go. You can concentrate on the activity and still capture all the details without distraction. Also, you can record sound with a helmet camera and narrate the activity as you go. If you're participating in an extreme sporting competition, you can record every moment as a keepsake for years to come.
Buying Helmet Cameras
When you get ready to buy a helmet camera, check online for a dependable retailer. You can always find great deals on quality lipstick cameras with all the accessories to go along. Search for helmet or bullet camera reviews to find good quality products. Also, check for sound quality, durability, and features before buying. Sometimes paying a little more is well worth it if you get a better quality helmet camera. There are affordable, high-quality cameras available online such as the Oregon Scientific ATC-2000 action adventure cam.
Tips for Using Helmet Cameras
Once you buy a helmet camera, take time to study on how to use it properly. Be sure the helmet cam has been properly secured before starting your activity. High speeds, bumps, and falls can cause the helmet camera to become lost or broken if you don't secure it properly. The camera's cable should also be secured so that it doesn't flap in the wind. Take quick breaks to check the lens to make sure it's clean if you're out on the road or in the dirt, water, or mud. Also, be sure the camera is actually recording before getting started!
http://www.majon.com/articles/Electronics/helmet_camera_719.html
For the Holidays, Go Online to Buy Hot Consumer Electronics
Experts are forecasting that, again this year, consumer electronics will top wish lists in the upcoming holiday season. And, although some shoppers continue to favor brick-and-mortar stores, an increasing number of consumers are finding better prices and greater selections of consumer electronics through online stores.
There are three categories of consumer electronics that are forecast to be especially hot this holiday season:
Gaming Systems
The recent launch of Halo 3 left no doubt among entertainment industry experts that video games and video game consoles can rake in more money than Hollywood movie premieres. With over $3 million in sales the first week, Halo 3 - the Xbox 360 signature game - dealt Microsoft a winning hand.
But the Xbox 360 isn't the only gaming system set to heat up during the holiday gift giving season. With its enhanced physicality and interactive community, Nintendo Wii is still considered the breakout gaming system of the decade. From the compelling Wii characters to the dexterity-challenging Nunchuk, every aspect of the Nintendo Wii is engaging and enchanting.
Although in some circles Sony's PlayStation has been left holding the bag, PS3 gaming systems are still hot commodities, especially for families with children. As some of the other gaming systems have skewed their video game releases to the teenage and adult markets, PS3 and PS2 systems have remained home to a vast array of kid-friendly games.
Cell Phones
Although cell phones are ubiquitous, they continue to be in demand. And, despite the hoopla associated with this year's launch of the innovative Apple iPhone, this holiday season will find most shoppers buying established cell phone brands like Nokia, Samsung, and Motorola.
Music and Video Players
When it comes to consumer electronics and the holidays, more people than ever before will be unwrapping music and video players. Apple iPods are expected to be in high demand, as will portable DVD players. And, with an increasing number of people becoming familiar with DVD recorders' multitude of features, DVD player/recorders will also be hot commodities this holiday season.
Buying Consumer Electronics Online
Because online stores don't have the overhead expenses associated with retail brick-and-mortar stores, they are often able to offer the most popular consumer electronics at rock bottom prices. Plus, online store offer the added bonus of allowing consumers to comparison shop in order to find the best deal on gaming systems, cell phones, and music and DVD players.
For example, some online stores will offer a variety of video games bundled with an Xbox 360, which can literally save consumers hundreds of dollars. Aside from bundled systems and other bargains, there are other factors to consider when choosing an online store to buy consumer electronics. These factors include real-time ordering and online inventory (so your gift won't be stuck on backorder), warehouse shipping (rather than having to wait for a middleman to ship the merchandise), and exceptional customer service (such as timely communication and non minimum purchase requirements).
When you find the right store, shopping online for consumer electronics can be a breeze - and a bargain!
http://www.majon.com/articles/Electronics/consumer_electronics_782.html
There are three categories of consumer electronics that are forecast to be especially hot this holiday season:
Gaming Systems
The recent launch of Halo 3 left no doubt among entertainment industry experts that video games and video game consoles can rake in more money than Hollywood movie premieres. With over $3 million in sales the first week, Halo 3 - the Xbox 360 signature game - dealt Microsoft a winning hand.
But the Xbox 360 isn't the only gaming system set to heat up during the holiday gift giving season. With its enhanced physicality and interactive community, Nintendo Wii is still considered the breakout gaming system of the decade. From the compelling Wii characters to the dexterity-challenging Nunchuk, every aspect of the Nintendo Wii is engaging and enchanting.
Although in some circles Sony's PlayStation has been left holding the bag, PS3 gaming systems are still hot commodities, especially for families with children. As some of the other gaming systems have skewed their video game releases to the teenage and adult markets, PS3 and PS2 systems have remained home to a vast array of kid-friendly games.
Cell Phones
Although cell phones are ubiquitous, they continue to be in demand. And, despite the hoopla associated with this year's launch of the innovative Apple iPhone, this holiday season will find most shoppers buying established cell phone brands like Nokia, Samsung, and Motorola.
Music and Video Players
When it comes to consumer electronics and the holidays, more people than ever before will be unwrapping music and video players. Apple iPods are expected to be in high demand, as will portable DVD players. And, with an increasing number of people becoming familiar with DVD recorders' multitude of features, DVD player/recorders will also be hot commodities this holiday season.
Buying Consumer Electronics Online
Because online stores don't have the overhead expenses associated with retail brick-and-mortar stores, they are often able to offer the most popular consumer electronics at rock bottom prices. Plus, online store offer the added bonus of allowing consumers to comparison shop in order to find the best deal on gaming systems, cell phones, and music and DVD players.
For example, some online stores will offer a variety of video games bundled with an Xbox 360, which can literally save consumers hundreds of dollars. Aside from bundled systems and other bargains, there are other factors to consider when choosing an online store to buy consumer electronics. These factors include real-time ordering and online inventory (so your gift won't be stuck on backorder), warehouse shipping (rather than having to wait for a middleman to ship the merchandise), and exceptional customer service (such as timely communication and non minimum purchase requirements).
When you find the right store, shopping online for consumer electronics can be a breeze - and a bargain!
http://www.majon.com/articles/Electronics/consumer_electronics_782.html
Friday, October 19, 2007
Safely Setting up and Using a Residential Standby Generator
One of the most tragic stories after a big storm is the inevitable tale of a family that was poisoned by carbon monoxide or electrocuted by an improperly installed or operated standby generator. These tragedies can be easily avoided by just following a few simple rules to ensure adequate isolation and ventilation.
Since they are most often used in the event of a storm or weather related events, residential standby generators are often forgotten until they are needed. This is, of course, the wrong time to find out that the suggested maintenance regime hasn't been properly followed. A improperly maintained generator may simply not start, send a spike that damages all your equipment and sometimes unlucky operators suffer severe shocks or burns. Careful testing when the storm season can mean the difference between being prepared or not.
However, it's not such a major project to maintain a standby generator that's only used in emergencies. This can usually be accomplished in a once-per-year check. When properly stored outdoors and undercover - an outbuilding or shed is an ideal location - this will likely entail little more than annual attention to the oil. In the case of portable generators or those systems used on a very regular basis, it's best to check on them on a more regular basis as you might an automobile.
In the case of gasoline or diesel generators, they should be treated like motorcycles being put away for the winter. If left alone, the fuel could turn into varnish and render the engine useless. There is likely a recommended maintenance regimen for managing the storage of fuel, that came with your standby generator, as generators from manufacturers such as Winco, Gillette and Pramac do. A yearly draining or treatment with an octane stabilizer is the usual course.
Portable generators are very nearly always gas, diesel or propane and require no major installation. However, it's often a good idea to have them on wheels since even so-called portable generators can be quite heavy. Most residential generators are at least semi-portable, so they may be moved into a suitable position before a storm or they may be essentially anchored to a location in the backyard. Thanks to modern satellite weather, such disasters are rarely a total surprise, so there is almost always time to bring the generator into position for use if necessary. Portable generators are often brought into the home or basement to ride out the storm in the case of severe weather.
Since appliances and devices will be plugged directly into the generator, you'll also need some thick gauge extension cords that are free of defects and nicks. Never try to plug the generator into your house grid. This is dangerous and rarely effective. It is unlikely you took every single appliance in the house into consideration, and the possibility of having no power at all is very real.
Heavy duty power-strips are suitable, but be sure and check on the maximum recommended current levels for any given device. You can easily figure this out if the rating is not given in watts. Since you know how much power (in watts) will be used, you can easily figure out the current (measured in amperes or amps) by dividing the number of watts by 110 volts (in North America) or 220 volts in the rest of the world.
Another type of problem that can occur is the result of a gas or propane generator that isn't properly installed. Natural gas powered standby generator installations are stationary by definition. The additional need of “plumbing” for the gas lines and valve maintenance is sometimes problematic and absolutely must be attended to yearly and inspected on a regular basis. If one isn't familiar with such work, it is often best to include the price of hiring a professional to assist in the install in your purchase price of this type of residential generator.
Most generators take as long as half a minute to power on completely. You can rely upon the protective circuits of a new standby generator, but with older models, they could be faulty, and that means disaster. Also, when large devices that have lost power and discharged completely, the initial power up could result in current draws that are nearly three times the normal load, as the very large capacitors fill back up like sponges.
When turning on a residential generator, a good plan of action is to let the generator power up for a moment, until operation stabilizes. There is very often an indicator that monitors the electrical performance. When everything is all settled down, you can then plug your essential items in one at a time.
Of course, for very expensive or critical gear, such as computers or medical equipment, it is imperative to have a battery backup system that will keep these devices running while the standby generator can be coaxed into life.
Maintaining and carefully operating a standby generator will allow you to feel confident when storms are bearing down upon your community. From the massive natural gas generators that power hospitals to wheeled and portable generators keeping your frozen food from melting, each has its own set of concerns.
http://www.articlebase.info/Article/Safely-Setting-up-and-Using-a-Residential-Standby-Generator/1973
Since they are most often used in the event of a storm or weather related events, residential standby generators are often forgotten until they are needed. This is, of course, the wrong time to find out that the suggested maintenance regime hasn't been properly followed. A improperly maintained generator may simply not start, send a spike that damages all your equipment and sometimes unlucky operators suffer severe shocks or burns. Careful testing when the storm season can mean the difference between being prepared or not.
However, it's not such a major project to maintain a standby generator that's only used in emergencies. This can usually be accomplished in a once-per-year check. When properly stored outdoors and undercover - an outbuilding or shed is an ideal location - this will likely entail little more than annual attention to the oil. In the case of portable generators or those systems used on a very regular basis, it's best to check on them on a more regular basis as you might an automobile.
In the case of gasoline or diesel generators, they should be treated like motorcycles being put away for the winter. If left alone, the fuel could turn into varnish and render the engine useless. There is likely a recommended maintenance regimen for managing the storage of fuel, that came with your standby generator, as generators from manufacturers such as Winco, Gillette and Pramac do. A yearly draining or treatment with an octane stabilizer is the usual course.
Portable generators are very nearly always gas, diesel or propane and require no major installation. However, it's often a good idea to have them on wheels since even so-called portable generators can be quite heavy. Most residential generators are at least semi-portable, so they may be moved into a suitable position before a storm or they may be essentially anchored to a location in the backyard. Thanks to modern satellite weather, such disasters are rarely a total surprise, so there is almost always time to bring the generator into position for use if necessary. Portable generators are often brought into the home or basement to ride out the storm in the case of severe weather.
Since appliances and devices will be plugged directly into the generator, you'll also need some thick gauge extension cords that are free of defects and nicks. Never try to plug the generator into your house grid. This is dangerous and rarely effective. It is unlikely you took every single appliance in the house into consideration, and the possibility of having no power at all is very real.
Heavy duty power-strips are suitable, but be sure and check on the maximum recommended current levels for any given device. You can easily figure this out if the rating is not given in watts. Since you know how much power (in watts) will be used, you can easily figure out the current (measured in amperes or amps) by dividing the number of watts by 110 volts (in North America) or 220 volts in the rest of the world.
Another type of problem that can occur is the result of a gas or propane generator that isn't properly installed. Natural gas powered standby generator installations are stationary by definition. The additional need of “plumbing” for the gas lines and valve maintenance is sometimes problematic and absolutely must be attended to yearly and inspected on a regular basis. If one isn't familiar with such work, it is often best to include the price of hiring a professional to assist in the install in your purchase price of this type of residential generator.
Most generators take as long as half a minute to power on completely. You can rely upon the protective circuits of a new standby generator, but with older models, they could be faulty, and that means disaster. Also, when large devices that have lost power and discharged completely, the initial power up could result in current draws that are nearly three times the normal load, as the very large capacitors fill back up like sponges.
When turning on a residential generator, a good plan of action is to let the generator power up for a moment, until operation stabilizes. There is very often an indicator that monitors the electrical performance. When everything is all settled down, you can then plug your essential items in one at a time.
Of course, for very expensive or critical gear, such as computers or medical equipment, it is imperative to have a battery backup system that will keep these devices running while the standby generator can be coaxed into life.
Maintaining and carefully operating a standby generator will allow you to feel confident when storms are bearing down upon your community. From the massive natural gas generators that power hospitals to wheeled and portable generators keeping your frozen food from melting, each has its own set of concerns.
http://www.articlebase.info/Article/Safely-Setting-up-and-Using-a-Residential-Standby-Generator/1973
Thursday, October 18, 2007
Plasma TV Wall Mount
For those who want their home theatre to imitate the cinematic experience, a plasma TV wall mount is a good investment to save space and to give a great effect. A plasma TV wall mount is easy to install yourself, but if you prefer, you can hire a professional to do the job for you. The price of a typical plasma TV wall mount can range from $60 to $350, and it is a good idea to invest in the best plasma TV wall mount you can afford, since plasma TVs are quite delicate and you cannot risk having your plasma TV fall to the ground. However, most plasma TV wall mounts do the job sufficiently well.
Your plasma TV wall mount should contain at least the following items:
• Wall plate
• Rails
• Arms
The wall plate attaches to the wall and the rails are for the back of the television. There should be two perpendicular arms with devices to connect to the back of the plate. The rails enable you to move the TV to the right or the left across the wall and enable you to lift the TV off, if necessary.
You need to select a plasma TV wall mount suited to the type of plasma TV that you have. The average size is 26-41” and weighs up to 100 pounds. A typical plasma TV wall mount can handle this type of set. However, if you plasma TV is larger than this and weighs more than 100 pounds, you will need a two stud wall mount.
It is possible to install your plasma TV wall mount on a concrete wall, although you will need a different type of plasma TV mount. Cement anchors are needed to keep you TV in place on a concrete surface, and you can also find long belts and other devices specially designed for concrete. As with any type of Plasma TV mount, ensure that your cement anchors are sturdy enough to hold a heavy unit.
When you install your plasma TV, you might not be certain about what height you want. If you have a typical, flat plasma TV wall mount, you will need to put your plasma TV at the correct height. However, many people like to have their plasma TV’s a little higher. One reason is that, since plasma TV are so vulnerable to damage, those with children prefer to put their plasma TV as high up as possible to avoid stray balls from hitting the screen. If you want to put your plasma TV up high, you will need a special plasma TV wall mount that tilts so your set can face downward at an angle. You will also need a tilt plasma TV wall mount if your set is not completely flat, but has a gentle curve at the back.
You can purchase a plasma TV wall mount with fixed arms or with articulating arms that move along a 90 degree swivel. The articulating wall mounts may cost a bit more, but are worth the investment if you like to view your television from different angles. They are not much more difficult to install than fixed arm wall mounts, and are just as durable.
Ensure that your plasma TV wall mount is sufficiently durable. It is a good idea to install your television along with a friend who can help you take your plasma TV on and off the mount while you are testing it for durability. A partner can also see if there is any “giving” or wobbling, and this second pair of eyes might just save your set. If you are unsure of your abilities, it is worthwhile to hire a professional to install your plasma TV mount.
http://www.articlejoe.com/Article/Plasma-TV-Wall-Mount/10141
Your plasma TV wall mount should contain at least the following items:
• Wall plate
• Rails
• Arms
The wall plate attaches to the wall and the rails are for the back of the television. There should be two perpendicular arms with devices to connect to the back of the plate. The rails enable you to move the TV to the right or the left across the wall and enable you to lift the TV off, if necessary.
You need to select a plasma TV wall mount suited to the type of plasma TV that you have. The average size is 26-41” and weighs up to 100 pounds. A typical plasma TV wall mount can handle this type of set. However, if you plasma TV is larger than this and weighs more than 100 pounds, you will need a two stud wall mount.
It is possible to install your plasma TV wall mount on a concrete wall, although you will need a different type of plasma TV mount. Cement anchors are needed to keep you TV in place on a concrete surface, and you can also find long belts and other devices specially designed for concrete. As with any type of Plasma TV mount, ensure that your cement anchors are sturdy enough to hold a heavy unit.
When you install your plasma TV, you might not be certain about what height you want. If you have a typical, flat plasma TV wall mount, you will need to put your plasma TV at the correct height. However, many people like to have their plasma TV’s a little higher. One reason is that, since plasma TV are so vulnerable to damage, those with children prefer to put their plasma TV as high up as possible to avoid stray balls from hitting the screen. If you want to put your plasma TV up high, you will need a special plasma TV wall mount that tilts so your set can face downward at an angle. You will also need a tilt plasma TV wall mount if your set is not completely flat, but has a gentle curve at the back.
You can purchase a plasma TV wall mount with fixed arms or with articulating arms that move along a 90 degree swivel. The articulating wall mounts may cost a bit more, but are worth the investment if you like to view your television from different angles. They are not much more difficult to install than fixed arm wall mounts, and are just as durable.
Ensure that your plasma TV wall mount is sufficiently durable. It is a good idea to install your television along with a friend who can help you take your plasma TV on and off the mount while you are testing it for durability. A partner can also see if there is any “giving” or wobbling, and this second pair of eyes might just save your set. If you are unsure of your abilities, it is worthwhile to hire a professional to install your plasma TV mount.
http://www.articlejoe.com/Article/Plasma-TV-Wall-Mount/10141
Plasma Flat Screen Television
The plasma flat screen television was invented in the 1960s, and although it made a brief appearance in the market in the 70s, it did not quite catch on. Nowadays, the plasma flat screen television is defining what a home theatre should be, and most people who pride themselves on having a fine home theatre own a plasma flat screen television along with other high-tech innovations, such as surround sound speakers. The plasma flat screen television truly gives one the feeling of sitting in the cinema, and, if mounted on the wall, it can save a lot of space. Although the price was once out of the range of the average consumers, plasma flat screen televisions are slowly moving into the range of affordability.
A plasma flat screen television uses technology that is quite different from the typical cathode ray television. Neon and Xenon gases move between two flat panel glasses. These are inert gases and are not dangerous. The result is amazing color; the typical plasma flat screen television produces 16 million unique colors and provides great contrast between dark and light. The screen has a “perfect black” that gives it a cinematic feel. Although the plasma flat screen television is much larger than the conventional television, with all of its devices, it is usually no more than four inches thick. This allows one to install a plasma flat screen television on the wall to save space.
Although the cost of a plasma flat screen television keeps decreasing, you should take into account the amount of power these televisions can use when you figure out the cost in real terms. While there are many energy-efficient models, a larger plasma flat screen television uses a lot of electricity. However the technology of the plasma TV is being developed and improved constantly, and, before long, using a plasma TV will conserve energy.
One advantage to the plasma flat screen television is that it has a relatively long life; the typical set has 60,000 hours to half life (half-life occurs when the screen quality is reduced by half). When you purchase your plasma flat screen television, ensure that you have an excellent warrantee and that you can have it serviced for free or at a low cost.
One thing to be aware of with your plasma flat screened television is that it is quite delicate, and the slightest bump can cause problems. For instance, if a child throws a ball at the screen, hundreds of individual tubes can lose their ability to glow, and repair for this is expensive, if it is possible. It is therefore a good idea for parents to install their plasma flat screened television so that it is high enough to avoid such interference (and don’t let your kids play ball in the TV room!). There are tilt wall mounts that allow you to install your plasma flat screened television at an angle if you store it high.
Along with the plasma flat-screened television, you can purchase plasma furniture or special cabinets and stands for your plasma television. If you prefer the classic, hardwood look, there are home entertainment cabinets specially designed to hold plasma flat screened televisions along with other equipment. For a more contemporary look, you can find metallic curved stands with simple glass shelves or just a short stand to place on top of an existing cabinet or table.
An important tip to keep in mind when choosing plasma flat screened television furniture and supplies is that they should be well-tested for sturdiness, since a plasma TV cannot handle a bump, much less, a complete fall. Make sure that all surfaces and mounts are sturdy enough to hold your set or more weight, just to be on the safe side.
http://www.articlejoe.com/Article/Plasma-Flat-Screen-Television/10142
A plasma flat screen television uses technology that is quite different from the typical cathode ray television. Neon and Xenon gases move between two flat panel glasses. These are inert gases and are not dangerous. The result is amazing color; the typical plasma flat screen television produces 16 million unique colors and provides great contrast between dark and light. The screen has a “perfect black” that gives it a cinematic feel. Although the plasma flat screen television is much larger than the conventional television, with all of its devices, it is usually no more than four inches thick. This allows one to install a plasma flat screen television on the wall to save space.
Although the cost of a plasma flat screen television keeps decreasing, you should take into account the amount of power these televisions can use when you figure out the cost in real terms. While there are many energy-efficient models, a larger plasma flat screen television uses a lot of electricity. However the technology of the plasma TV is being developed and improved constantly, and, before long, using a plasma TV will conserve energy.
One advantage to the plasma flat screen television is that it has a relatively long life; the typical set has 60,000 hours to half life (half-life occurs when the screen quality is reduced by half). When you purchase your plasma flat screen television, ensure that you have an excellent warrantee and that you can have it serviced for free or at a low cost.
One thing to be aware of with your plasma flat screened television is that it is quite delicate, and the slightest bump can cause problems. For instance, if a child throws a ball at the screen, hundreds of individual tubes can lose their ability to glow, and repair for this is expensive, if it is possible. It is therefore a good idea for parents to install their plasma flat screened television so that it is high enough to avoid such interference (and don’t let your kids play ball in the TV room!). There are tilt wall mounts that allow you to install your plasma flat screened television at an angle if you store it high.
Along with the plasma flat-screened television, you can purchase plasma furniture or special cabinets and stands for your plasma television. If you prefer the classic, hardwood look, there are home entertainment cabinets specially designed to hold plasma flat screened televisions along with other equipment. For a more contemporary look, you can find metallic curved stands with simple glass shelves or just a short stand to place on top of an existing cabinet or table.
An important tip to keep in mind when choosing plasma flat screened television furniture and supplies is that they should be well-tested for sturdiness, since a plasma TV cannot handle a bump, much less, a complete fall. Make sure that all surfaces and mounts are sturdy enough to hold your set or more weight, just to be on the safe side.
http://www.articlejoe.com/Article/Plasma-Flat-Screen-Television/10142
Tuesday, October 16, 2007
3 Simple Ways To Save A Bunch Of Money When Buying A New Computer!
Looking to buy a new computer?
Overwhelmed by all of the options available to you?
Stressed by the high cost of computers today?
For most people, buying a new computer does not have to be as stressful as buying a new car. Nor does it have to be as expensive. If you’re like most people, and you have a limited budget for buying a computer, then you need to try to get as much computer for your money as possible.
Here are 3 simple ways anyone can save money when buying a new computer:
1) Shop around for best deal.
Sounds pretty obvious. But many people don’t realize they don’t need the fastest, most expensive computer with the most “extras”. In fact, if you are already using an older computer, even the least expensive new computer will be a big upgrade. If you don’t know a lot about computers, you can learn a lot by shopping around. Ask lots of questions, compare prices, compare features, then find the best price. Shop at your local electronics store, and look for the best deals online. You’ll be surprised at how much money you can save by shopping around!
2) Install your own “extras”
Many computers you will find in a store have a lot of extra software already installed. While this is convenient, it is not always the best way for you to save money. Also, while many of these extras sound good, you don’t always need them. You can often find better deals by shopping around separately for your own software extras (such as a word processor, anti-virus, popup blocker, spyware removal, games, etc). And some of these you can get for free. So before you buy the “fully loaded” computer, ask yourself if you really need all the extras, then shop around to see if you can buy a scaled down computer - and get the extras yourself for much less!
3) Don’t buy extended warranty
If you are not a computer “techie”, the extended warranties offered by the computer retailers often sound like a good idea. After all, who wants to be bothered paying for service on a computer after you buy it. But keep in mind that most computers come with a warranty, and most computer problems will either happen at the beginning (when you still have the warranty in effect) or much later (when it might be cheaper to buy a new computer). Technology changes very quickly these days. So consider whether or not it’s worth the inflated price of the extended warranty. And, if you really feel you need the extended warranty, then ask to purchase it at a lower price. Not all retailers will negotiate on the warranty, but some will. And whether you buy the extended warranty or not, make sure you back up all your files periodically, just in case!
If you have an unlimited budget, consider yourself lucky. And if you do business on the computer, make sure you get what you need, while trying to keep the price down. At any price, buying something that does not fit your needs is not a good deal.
Hope you find these tips helpful, and happy computer shopping!
http://www.articlejoe.com/Article/3-Simple-Ways-To-Save-A-Bunch-Of-Money-When-Buying-A-New-Computer-/1622
Overwhelmed by all of the options available to you?
Stressed by the high cost of computers today?
For most people, buying a new computer does not have to be as stressful as buying a new car. Nor does it have to be as expensive. If you’re like most people, and you have a limited budget for buying a computer, then you need to try to get as much computer for your money as possible.
Here are 3 simple ways anyone can save money when buying a new computer:
1) Shop around for best deal.
Sounds pretty obvious. But many people don’t realize they don’t need the fastest, most expensive computer with the most “extras”. In fact, if you are already using an older computer, even the least expensive new computer will be a big upgrade. If you don’t know a lot about computers, you can learn a lot by shopping around. Ask lots of questions, compare prices, compare features, then find the best price. Shop at your local electronics store, and look for the best deals online. You’ll be surprised at how much money you can save by shopping around!
2) Install your own “extras”
Many computers you will find in a store have a lot of extra software already installed. While this is convenient, it is not always the best way for you to save money. Also, while many of these extras sound good, you don’t always need them. You can often find better deals by shopping around separately for your own software extras (such as a word processor, anti-virus, popup blocker, spyware removal, games, etc). And some of these you can get for free. So before you buy the “fully loaded” computer, ask yourself if you really need all the extras, then shop around to see if you can buy a scaled down computer - and get the extras yourself for much less!
3) Don’t buy extended warranty
If you are not a computer “techie”, the extended warranties offered by the computer retailers often sound like a good idea. After all, who wants to be bothered paying for service on a computer after you buy it. But keep in mind that most computers come with a warranty, and most computer problems will either happen at the beginning (when you still have the warranty in effect) or much later (when it might be cheaper to buy a new computer). Technology changes very quickly these days. So consider whether or not it’s worth the inflated price of the extended warranty. And, if you really feel you need the extended warranty, then ask to purchase it at a lower price. Not all retailers will negotiate on the warranty, but some will. And whether you buy the extended warranty or not, make sure you back up all your files periodically, just in case!
If you have an unlimited budget, consider yourself lucky. And if you do business on the computer, make sure you get what you need, while trying to keep the price down. At any price, buying something that does not fit your needs is not a good deal.
Hope you find these tips helpful, and happy computer shopping!
http://www.articlejoe.com/Article/3-Simple-Ways-To-Save-A-Bunch-Of-Money-When-Buying-A-New-Computer-/1622
Monday, October 15, 2007
Hitachi 55PMA550E TV - Style and Sophistication By The Bucket Load But at a Price?
Getting a new television for the home is a major purchase nowadays. The idea of parting with what could be a couple of hundred notes does tend to concentrate the mind somewhat.
Ensuring that any purchase you make is to all intent and purposes future-proof has to be the most major of all criteria when deciding which TV to buy.
Digital television (DTT) is a telecommunication system for broadcasting and receiving moving pictures and sound by means of digital signals, in contrast to analogue signals used by analogue (traditional) TV. Introduced in the late 1990s, this technology appealed to the television broadcasting business and consumer electronics industries as offering new financial opportunities.
With this article the aim is to take a look at what is on offer with the latest generation of Flat Screen Televisions and in this case the Hitachi 55PMA550E.
The 55PMA550E is a 55in Plasma TV and the prices for these would be in the region of 3500 pounds sterling or 7000 US dollars. The resolution of the screen is 1366 X 768 and with regards to being HD Ready the answer is yes. The Hitachi has 1 (1 RGB) scarts and the type and number of Multimedia interfaces the 55PMA550E uses is DVI and 1. The type of Tuner for this TV is Analogue and the Hitachi is available from a wide variety of outlets.
All these points being taken into consideration, how would we view the Hitachi 55PMA550E?
Well to start with our score for the picture quality is 10 out of 10, and for the sound quality we would rate it at 8 out of 10. Another useful aspect to review is the availability and number of relevant connections and our score here would be 10 out of 10. With regards to the overall level of features, our view would be 10 out of 10 and for ease of use and overall value for money we would give it, 8 out of 10 and 10 out of 10 respectively.
The overall verdict would be that this Plasma TV has we feel got performance, style and sophistication oozing out of every connection but this has to be balanced by the fact that it is not the cheapest Plasma screen available.
It is extremely unlikely given the variety and range of makes and models available that you will not be able to find something to match your tastes or budget. You could either opt for one of the more cutting edge newer options available or stay safe and go for one of the more established options available. We hope that after reading this article you will find yourself better informed and as such it will mean that really it will not matter which rout you take.
Please be aware that the prices quoted in this article are taken from a number of leading e-commerce websites and as such should be taken as guides and indications of prices rather than absolute quotes.
About The Author
Scott James writes about Flat Screen Televisions and the new generation of Plasma and Digital Televisions at Hitachi 55PMA550E TV and http://flatscreentvreview.biz
Saturday, October 13, 2007
Home Theater Projectors for the Cinephile in You.
Over the years, I have grown really attached to my home theater system. I must say, of all the rooms in the house, my own little movie theater is the one I could not live without. I am absolutely in love with my home theater system and, if you are anything like me, I am sure you will love yours too. I found, when I was initially building my system, that there was so much information to absorb. Every product out there seemed better than the next, and I found myself unsure about which to buy. Here are a few things to keep in mind when shopping for a new home theater projector.
There are two main types of projectors on the market; DLP and LCD. DLP stands for digital light processing. It was invented by Texas Instruments, and utilizes a microscopic array of over 2 million mirrors. DLP has a higher contrast than LCD, but there are some unfavorable consumer reports that note something called the "rainbow effect". The "rainbow effect" is noticeable when looking from one side of the screen to the other, and is characterized by a sudden burst of color.
LCD stands for liquid crystal display. These projectors have three distinct glass LCD panels inside; one for each component of the video signal (red, green, and blue). While DLP chips reflect light, the LCD panels allow light to pass through them. LCD projectors produce brighter images, and they are known for having excellent color saturation. In the end, you will be hard-pressed to notice a great difference between the two types of projection systems.
When shopping for a new projector, keep your particular needs in the forefront of your thoughts. As I mentioned above, it is really easy to lose yourself in the minutiae of each particular system. Connectivity is a definitely something to be mindful of. Make sure that you are able to connect all of your components, including your gaming system. Nothing beats playing Halo in real-life size! Contract ratio is another important factor; the higher the ratio, the better the picture will be.
The brightness of your projector is another thing to consider. Light output is measured in ANSI (American National Standards Institute) lumens. You will want to avoid a projector that produces anything shy of 1000 lumens. As you are likely aware, the projection resolution is extremely important. This refers to the number of pixels that can be displayed on the screen. Go for something that is no less than 1024x768, as this will allow you to fully appreciate the depth and quality of HDTV. In the end, you should buy the projector that is in line with your needs and your budget. Soprano's is coming on right now! Time to go!
http://www.articlejoe.com/Article/Home-Theater-Projectors-for-the-Cinephile-in-You-/22966
There are two main types of projectors on the market; DLP and LCD. DLP stands for digital light processing. It was invented by Texas Instruments, and utilizes a microscopic array of over 2 million mirrors. DLP has a higher contrast than LCD, but there are some unfavorable consumer reports that note something called the "rainbow effect". The "rainbow effect" is noticeable when looking from one side of the screen to the other, and is characterized by a sudden burst of color.
LCD stands for liquid crystal display. These projectors have three distinct glass LCD panels inside; one for each component of the video signal (red, green, and blue). While DLP chips reflect light, the LCD panels allow light to pass through them. LCD projectors produce brighter images, and they are known for having excellent color saturation. In the end, you will be hard-pressed to notice a great difference between the two types of projection systems.
When shopping for a new projector, keep your particular needs in the forefront of your thoughts. As I mentioned above, it is really easy to lose yourself in the minutiae of each particular system. Connectivity is a definitely something to be mindful of. Make sure that you are able to connect all of your components, including your gaming system. Nothing beats playing Halo in real-life size! Contract ratio is another important factor; the higher the ratio, the better the picture will be.
The brightness of your projector is another thing to consider. Light output is measured in ANSI (American National Standards Institute) lumens. You will want to avoid a projector that produces anything shy of 1000 lumens. As you are likely aware, the projection resolution is extremely important. This refers to the number of pixels that can be displayed on the screen. Go for something that is no less than 1024x768, as this will allow you to fully appreciate the depth and quality of HDTV. In the end, you should buy the projector that is in line with your needs and your budget. Soprano's is coming on right now! Time to go!
http://www.articlejoe.com/Article/Home-Theater-Projectors-for-the-Cinephile-in-You-/22966
What is Surround Sound and Why Do You Want It?
Whether you are an audio novice or an experienced technophile, this article is for you. Let’s take a few minutes to review the basics of surround sound, and the principles behind it. If you are new to surround sound, this will help you to understand the concept. It will also refresh the memory of those already in the know. These are the basics of sound.
Monophonic sound is single channel and unidirectional. Basically, this means that your audio is all filtered down into a flat single channel. All elements of the recording are mixed down into one source, thereby seeming to originate from the same source no matter where you are standing in the room. This is old school, kids.
Stereophonic sound is reproduced through two channels and is considered superior to monophonic sound. You can tell stereophonic sound, because different sounds originate from either speaker. This type of sound gives one the sense of being there during the recording. The best example of this is listening to a recording of the symphony, where different band members are located in different parts of the room. The strings are over here, and the horns are over there.
Surround sound was first pioneered by Dolby in the early 1970’s, and first used in movies such as “Tommy” and “Close Encounters of the Third Kind”. The Dolby process encapsulates four channels of audio; left, right, rear, and phantom center. The reason it is called phantom center is because it is essentially a mix of the left and right front channels. This gives the listener the impression of being surrounded by sound, hence the name surround sound.
Dolby surround sound has evolved considerably in recent years. Dolby 5.1 is bar far the most common. Dolby 5.1 is similar to traditional surround sound, but it is further broken down and processed into more distinct channels. Dolby 5.1 increases the range of sound by adding stereo rear sound as well as a dedicated subwoofer channel. This results in a far superior surround sound experience. You not only hear surround sound, but you feel it, too!
Technology is ever changing, and the marketplace offers many surround sound options. This article is not complete by any means, and only serves as a primer on the basics. Check out your local electronics superstore for the latest technology.
http://www.articlejoe.com/Article/What-is-Surround-Sound-and-Why-Do-You-Want-It-/22965
Monophonic sound is single channel and unidirectional. Basically, this means that your audio is all filtered down into a flat single channel. All elements of the recording are mixed down into one source, thereby seeming to originate from the same source no matter where you are standing in the room. This is old school, kids.
Stereophonic sound is reproduced through two channels and is considered superior to monophonic sound. You can tell stereophonic sound, because different sounds originate from either speaker. This type of sound gives one the sense of being there during the recording. The best example of this is listening to a recording of the symphony, where different band members are located in different parts of the room. The strings are over here, and the horns are over there.
Surround sound was first pioneered by Dolby in the early 1970’s, and first used in movies such as “Tommy” and “Close Encounters of the Third Kind”. The Dolby process encapsulates four channels of audio; left, right, rear, and phantom center. The reason it is called phantom center is because it is essentially a mix of the left and right front channels. This gives the listener the impression of being surrounded by sound, hence the name surround sound.
Dolby surround sound has evolved considerably in recent years. Dolby 5.1 is bar far the most common. Dolby 5.1 is similar to traditional surround sound, but it is further broken down and processed into more distinct channels. Dolby 5.1 increases the range of sound by adding stereo rear sound as well as a dedicated subwoofer channel. This results in a far superior surround sound experience. You not only hear surround sound, but you feel it, too!
Technology is ever changing, and the marketplace offers many surround sound options. This article is not complete by any means, and only serves as a primer on the basics. Check out your local electronics superstore for the latest technology.
http://www.articlejoe.com/Article/What-is-Surround-Sound-and-Why-Do-You-Want-It-/22965
Impress your Friends with your new Home Theater System
So you’re in the market for a new home theater system? Why not? Everyone you know either has one or wants one. Are you sick of having to go to your buddy’s place to watch the game on the big screen? Have you been playing that SNES system, circa 1995, since, well, 1995? Is your prized movie collection in laserdisc format? Maybe it is time to invest in a new home theater.
The first thing you ought to do is establish a budget. You could spend thousands of dollars on your new system, so give some consideration to what you are able to spend. There’s no point spending your rent money on a TV, if you will not have an apartment to watch it in.
Once you have decided what you are able to spend, draft a wish list of components you would like. Big screen TV or LCD projector? X-Box or Playstation? What about surround sound? 5:1? 6:1? 7:1? There are so many options, and the possibilities are seemingly endless. Keep it simple. Do you really need a 51 inch HDTV, for your 10x10 living room?
Either way, your system will definitely need certain components to qualify as a home theater. For the sake of being modest, why not consider getting started with a home-theater-in-a-box? These packages generally come with a surround sound receiver, a set of speakers, and a DVD/CD player. These systems are relatively inexpensive, and will leave you with enough cash flow to buy that new Sopranos box set! Capice?
A lot of people like to include gaming systems in their home theater, especially if they are able to play on a big screen. There’s nothing like playing Halo in life size! If you do most of your gaming on your computer, most decent video cards will have a video line out that you can use to connect to your TV or projector. Otherwise, you can incorporate any other console system into your home theater.
Your sound system will likely consist of a number of speakers (left, right, and center front, surround left and right, and a subwoofer). This is the standard surround system. The wattage of the amplifier you are using will greatly affect the sound being produced, so be sure to use one with enough power to effectively supply your system.
As I said, the options are seemingly endless for home theater systems. Be sure to buy from a reputable dealer, and do not buy anything that does not have a 30-day money back guarantee……just in case you have to return it to pay your rent!
http://www.articlejoe.com/Article/Impress-your-Friends-with-your-new-Home-Theater-System/22964
The first thing you ought to do is establish a budget. You could spend thousands of dollars on your new system, so give some consideration to what you are able to spend. There’s no point spending your rent money on a TV, if you will not have an apartment to watch it in.
Once you have decided what you are able to spend, draft a wish list of components you would like. Big screen TV or LCD projector? X-Box or Playstation? What about surround sound? 5:1? 6:1? 7:1? There are so many options, and the possibilities are seemingly endless. Keep it simple. Do you really need a 51 inch HDTV, for your 10x10 living room?
Either way, your system will definitely need certain components to qualify as a home theater. For the sake of being modest, why not consider getting started with a home-theater-in-a-box? These packages generally come with a surround sound receiver, a set of speakers, and a DVD/CD player. These systems are relatively inexpensive, and will leave you with enough cash flow to buy that new Sopranos box set! Capice?
A lot of people like to include gaming systems in their home theater, especially if they are able to play on a big screen. There’s nothing like playing Halo in life size! If you do most of your gaming on your computer, most decent video cards will have a video line out that you can use to connect to your TV or projector. Otherwise, you can incorporate any other console system into your home theater.
Your sound system will likely consist of a number of speakers (left, right, and center front, surround left and right, and a subwoofer). This is the standard surround system. The wattage of the amplifier you are using will greatly affect the sound being produced, so be sure to use one with enough power to effectively supply your system.
As I said, the options are seemingly endless for home theater systems. Be sure to buy from a reputable dealer, and do not buy anything that does not have a 30-day money back guarantee……just in case you have to return it to pay your rent!
http://www.articlejoe.com/Article/Impress-your-Friends-with-your-new-Home-Theater-System/22964
Digital Cameras and Photography Shopping Tips for Electronics Consumers
The majority of digital camera focused tips you will view on the internet are focused on assisting people to research specific digital camera items such as Tamron AF55 200mm F 4 5 6 Di II LD Macro lens and LEICA CAMERA Starter Accessory Kits, locating this type of digital camera guidance may sometimes be very arduous indeed.
For people getting merchandise such as Fujifilm Finepix V10 5MP Digital Cameras or Olympus C770 Digital Cameras, it is best advised to speak to a variety of photography specialists before you embark on your search, you might very well be shopping for a special product like a Nikon TC E3ED 3X Teleconverter Lens or a Tiffen 72mm Lens Kit includes Digital Ultra Clear Filter but because of a lack of details take the wrong Sigma APO 70 200mm f 2 8 EX DG Macro HSM Lens.
Before you contemplate any digital camera purchase be sure that the digital photography merchant you might be buying your product from gives you the opinion that getting a refund and merchandise returns will not turn out to be a hassle, switching or part exchanging a Nikon WC E75 Wide Converter Lens for a Tamron AF55 200mm F 4 5 6 Di II LD Macro Lens must never turn into a real issue.
A whole host of digital camera related searches could possibly have led you to a digital camera or photography associated portal, searches such as "find Canon S230 digital Cameras" or "guides on Canon SD700s", the real trick with any digital photography portal is to go immediately to the site menu, if you do this you should not be side tracked due to digital camera guides that are not connected to the photography item you need.
The digital camera experts will be able to give you some reliable niche advice on issues such as obtaining the most competitive prices on HP Photosmart M517 5MP Digital Cameras and how to get the proper merchandise guarantee when ordering a digital camera, such quality digital camera guidance will surely ensure you get the right product for your requirements.
The way to find out if a digital camera website may be able to help you with your particular digital camera search, pretend for a moment a Coolpix 3700 digital camera is your particular product, is to discover if the site contains a categorised digital camera section and a good number of digital camera write ups, if in fact it does supply this type of things then getting a digital camera that is suitable will be easy, if however the site is about a common photography topic then it is unlikely you will come up with your required digital camera targeted help.
It has to be said that the town book shop can often be an obvious place to obtain guidance about digital camera items, advances such as the internet can make us neglect the many different photography resources that are currently freely available to us, you should certainly make use of these kinds of havens of great digital camera data, suitable digital camera product info may very often be hard to find.
The digital camera experts will be able to offer you some prime niche info on issues such as obtaining the lowest price on HP Photosmart M22 4MP Digital Cameras and how to get the right merchandise guarantee while buying a digital camera, such digital camera assistance will surely make sure you order the best products for your needs.
The easiest way to tell if a digital camera site may perhaps be able to help you with your particular digital camera search, say for example a Casio Exilim EXZ55 5MP Digital Camera is your specific item, is to try and see if the website contains a categorized digital camera directory and an amount of digital camera reviews, if indeed it does incorporate these types of things finding the digital camera you want will be easy, if however the particular site is targeted at a general digital photography subject then the chances are you won't pinpoint your necessary digital camera targeted help.
If a person is purchasing merchandise like a Kodak Performance Series Digital Camera it might not always mean purchasing from a digital camera or photography focused site, lets imagine you are living in Arizona for example, a digital camera directory may be able to give you relevant details of closely situated digital camera stores who should with any luck be able to help you to find the digital camera you require.
http://www.articlejoe.com/Article/Digital-Cameras-and-Photography-Shopping-Tips-for-Electronics-Consumers/21617
For people getting merchandise such as Fujifilm Finepix V10 5MP Digital Cameras or Olympus C770 Digital Cameras, it is best advised to speak to a variety of photography specialists before you embark on your search, you might very well be shopping for a special product like a Nikon TC E3ED 3X Teleconverter Lens or a Tiffen 72mm Lens Kit includes Digital Ultra Clear Filter but because of a lack of details take the wrong Sigma APO 70 200mm f 2 8 EX DG Macro HSM Lens.
Before you contemplate any digital camera purchase be sure that the digital photography merchant you might be buying your product from gives you the opinion that getting a refund and merchandise returns will not turn out to be a hassle, switching or part exchanging a Nikon WC E75 Wide Converter Lens for a Tamron AF55 200mm F 4 5 6 Di II LD Macro Lens must never turn into a real issue.
A whole host of digital camera related searches could possibly have led you to a digital camera or photography associated portal, searches such as "find Canon S230 digital Cameras" or "guides on Canon SD700s", the real trick with any digital photography portal is to go immediately to the site menu, if you do this you should not be side tracked due to digital camera guides that are not connected to the photography item you need.
The digital camera experts will be able to give you some reliable niche advice on issues such as obtaining the most competitive prices on HP Photosmart M517 5MP Digital Cameras and how to get the proper merchandise guarantee when ordering a digital camera, such quality digital camera guidance will surely ensure you get the right product for your requirements.
The way to find out if a digital camera website may be able to help you with your particular digital camera search, pretend for a moment a Coolpix 3700 digital camera is your particular product, is to discover if the site contains a categorised digital camera section and a good number of digital camera write ups, if in fact it does supply this type of things then getting a digital camera that is suitable will be easy, if however the site is about a common photography topic then it is unlikely you will come up with your required digital camera targeted help.
It has to be said that the town book shop can often be an obvious place to obtain guidance about digital camera items, advances such as the internet can make us neglect the many different photography resources that are currently freely available to us, you should certainly make use of these kinds of havens of great digital camera data, suitable digital camera product info may very often be hard to find.
The digital camera experts will be able to offer you some prime niche info on issues such as obtaining the lowest price on HP Photosmart M22 4MP Digital Cameras and how to get the right merchandise guarantee while buying a digital camera, such digital camera assistance will surely make sure you order the best products for your needs.
The easiest way to tell if a digital camera site may perhaps be able to help you with your particular digital camera search, say for example a Casio Exilim EXZ55 5MP Digital Camera is your specific item, is to try and see if the website contains a categorized digital camera directory and an amount of digital camera reviews, if indeed it does incorporate these types of things finding the digital camera you want will be easy, if however the particular site is targeted at a general digital photography subject then the chances are you won't pinpoint your necessary digital camera targeted help.
If a person is purchasing merchandise like a Kodak Performance Series Digital Camera it might not always mean purchasing from a digital camera or photography focused site, lets imagine you are living in Arizona for example, a digital camera directory may be able to give you relevant details of closely situated digital camera stores who should with any luck be able to help you to find the digital camera you require.
http://www.articlejoe.com/Article/Digital-Cameras-and-Photography-Shopping-Tips-for-Electronics-Consumers/21617
Women Are Major Electronics Consumers
Women are taking a greater interest in, and have a more sophisticated understanding of electronics than ever before.
Women actually spent more on technology last year than men, according to the Consumer Electronics Association. It says women accounted for $55 billion of the $96 billion spent on electronics gear (statistic from a January 6 CEA press release).
Women are increasingly interested in gadgets, from DVD players to digital cameras, for themselves or birthday gifts for their families.
Almost a third of women consider themselves early adopters willing to buy cutting-edge consumer technology.
CEA reported that women in the United States are becoming more likely to use consumer electronics. CEA's study provides detailed information about the attitudes, purchase considerations, decision influences, purchase channels, current product ownership, and future purchase intent. Here are some of the findings:
• Women are involved in 89 percent of all consumer electronics purchase decisions.
• 84% of women believe that new technologies can improve their lives.
• 48% of women age 18–34 own a digital camera.
The CEA survey noted that women have very positive reactions to specific technology areas, like HDTV, cell phones, and digital photography.
Women have more buying power and they increasingly use technology to manage their busy schedules. Women's comfort level with technology is at an all-time high.
Women want products that make it easy to connect and make it easy to operate; limited wiring or no wires at all; slim, well-designed products; making electronics available in different colors is not very important; low on setup and high on usability. Usability often is an important factor to women when they buy technology;
At CES, organizers hung big pink banners saying "Technology is a Girl's Best Friend," even though the group's own research found a third of women surveyed don't like products with girlie colors.
Nearly three-quarters of women surveyed complained about being ignored or patronized by sales people when shopping for electronics.
A growing number of companies are starting to target their wares toward female buyers.
Sony is outfitting its electronics with features that many women seek and is designing Sony Style retail stores to appeal to women’s preferences by creating an environment where women feel comfortable. Many of Sony’s efforts are focused on functionality. Women are becoming informed and involved in technology areas where they once had little or no presence.
About Author
For unique, unusual gifts visit the The Dog House
Women actually spent more on technology last year than men, according to the Consumer Electronics Association. It says women accounted for $55 billion of the $96 billion spent on electronics gear (statistic from a January 6 CEA press release).
Women are increasingly interested in gadgets, from DVD players to digital cameras, for themselves or birthday gifts for their families.
Almost a third of women consider themselves early adopters willing to buy cutting-edge consumer technology.
CEA reported that women in the United States are becoming more likely to use consumer electronics. CEA's study provides detailed information about the attitudes, purchase considerations, decision influences, purchase channels, current product ownership, and future purchase intent. Here are some of the findings:
• Women are involved in 89 percent of all consumer electronics purchase decisions.
• 84% of women believe that new technologies can improve their lives.
• 48% of women age 18–34 own a digital camera.
The CEA survey noted that women have very positive reactions to specific technology areas, like HDTV, cell phones, and digital photography.
Women have more buying power and they increasingly use technology to manage their busy schedules. Women's comfort level with technology is at an all-time high.
Women want products that make it easy to connect and make it easy to operate; limited wiring or no wires at all; slim, well-designed products; making electronics available in different colors is not very important; low on setup and high on usability. Usability often is an important factor to women when they buy technology;
At CES, organizers hung big pink banners saying "Technology is a Girl's Best Friend," even though the group's own research found a third of women surveyed don't like products with girlie colors.
Nearly three-quarters of women surveyed complained about being ignored or patronized by sales people when shopping for electronics.
A growing number of companies are starting to target their wares toward female buyers.
Sony is outfitting its electronics with features that many women seek and is designing Sony Style retail stores to appeal to women’s preferences by creating an environment where women feel comfortable. Many of Sony’s efforts are focused on functionality. Women are becoming informed and involved in technology areas where they once had little or no presence.
About Author
For unique, unusual gifts visit the The Dog House
Home Theatre - What Difference Do Cables Make?
If you go to your local home theater store, you may be confronted by a variety of “extreme” sounding names for cabling: Mega Cables, Monster Cables, Uber Cables… the proliferation of “boutique” cabling is always a source of controversy in home theater and audiophile circles. The question is, how much difference do they make, and are they worth it? Well despite the perils involved in even mentioning this topic, I’m going to attempt to add something to the discussion.
The most important thing to recognize is that a cable cannot improve the sound of a home stereo system any more than an electrical wire can create extra electricity when you plug it into the wall. That’s actually a very good example, because when you’re listening to audio for instance, what we’re hearing is an electronic representation of acoustic sounds – that is to say, the actual sounds have not been captured and stuffed into a compact disc like fireflies in a child’s jar – they have been copied, imitated, and a representation stored on the disc as a series of numbers.
These numbers are then read and translated into electronic signals, which are sent to the speakers in order to approximate the actual sounds. With that in mind, it makes sense that poor quality wires don’t physically change the sound – instead it’s like a game of ‘telephone’, in which the band tells the CD, the CD tells the player, the player tells the wires, and the wires tell the speakers, with something being lost at every step so that the message “Aunt Betty baked a pie” is altered to “Fat Eddy wants to cry” or what should be a great live recording sounds tinny, distant, or otherwise just plain wrong.
A good cable will change the signal as little as possible, but all cables do damage your signal a bit – it’s simply a matter of degree. As far as which cables are the best? That’s up to you or your local audio guru to decide – much is up to personal preference, with the rest probably being left up to your budget to decide.
About Author:
Warren Thompson is fanatic about his new home theater system. He is also a contributing writer for hometheaterfocus.com – an immensely informative guide to home theater technology, with information about speaker positioning, home theater lighting, projection systems and more.
The most important thing to recognize is that a cable cannot improve the sound of a home stereo system any more than an electrical wire can create extra electricity when you plug it into the wall. That’s actually a very good example, because when you’re listening to audio for instance, what we’re hearing is an electronic representation of acoustic sounds – that is to say, the actual sounds have not been captured and stuffed into a compact disc like fireflies in a child’s jar – they have been copied, imitated, and a representation stored on the disc as a series of numbers.
These numbers are then read and translated into electronic signals, which are sent to the speakers in order to approximate the actual sounds. With that in mind, it makes sense that poor quality wires don’t physically change the sound – instead it’s like a game of ‘telephone’, in which the band tells the CD, the CD tells the player, the player tells the wires, and the wires tell the speakers, with something being lost at every step so that the message “Aunt Betty baked a pie” is altered to “Fat Eddy wants to cry” or what should be a great live recording sounds tinny, distant, or otherwise just plain wrong.
A good cable will change the signal as little as possible, but all cables do damage your signal a bit – it’s simply a matter of degree. As far as which cables are the best? That’s up to you or your local audio guru to decide – much is up to personal preference, with the rest probably being left up to your budget to decide.
About Author:
Warren Thompson is fanatic about his new home theater system. He is also a contributing writer for hometheaterfocus.com – an immensely informative guide to home theater technology, with information about speaker positioning, home theater lighting, projection systems and more.
Consumer Electronics
Introduction:
The daily use of electronic equipments are known as consumer electronics and includes TV, telephone, DVD, CD, PC, laptop etc. These equipments are manufactured throughout the world. With the advancement in electronic engineering at a continuous pace, a number of new variety electronics items flood into the market every year and the cost the existing products reduces continuously and it is one of the biggest advantage of consumer electronics industry.
Electronic waste is one of the problems associated with these electronic item and many manufacturers are now planning to deal with these waste.
Semiconductor:
All electronic devices use semiconductors and without these semiconductors none of the electronic device is complete. Semiconductor behaves like an insulator at absolute zero (-273 degree centigrade) and can be distinguished from conductor that at this temperature the outermost filled electron energy band is completely filled in a semiconductor compare to the conductor in which the band is partially filled.
At room temperature semiconductor show a very small electrical conductivity much lower than that of conductor.
Doping in semiconductor:
Most common semiconductors used for electronic devices are silicon and germanium. Although some other conductors such as iridium phosphide, gallium arsenide and mercury cadmium telluride are also used.
A pure semiconductor also known as intrinsic semiconductor, when doped with electron rich element e.g. arsenic or electron deficient element e.g. boron in very small quantity, its conductivity increases and the resultant conductor is known as extrinsic conductor. My doping arsenic (electron rich) and boron (electron deficient) in silicon, we get n-type (negative type) and p-type (positive type) semiconductor devices.
We may create a p-n junction by doping different element in different region of semiconductor and the device is known as diode. Similarly we can create p-n-p or n-p-n junctions and the device is known as triodes.
Electronic Devices
(a) Television:
It is a device by which we can receive moving pictures and sounds over a distance. The whole transmission and receiver systems require the following inputs.
1.Camera for live images or flying spot scanner for transmission of films and sound source.
2.Transmitters for transmitting both images and sounds.
3.Receiver systems for receiving these signals.
4.Display device, which is either CRT, Rear projection, LCD or plasma. To display the signal in the forms of images and sounds.
(b) Telephone:
It is the device for communicating by which two persons can send and receive sound signals over a distance. The system requires the following inputs.
1.The telephone equipment, which converts sound signals to electrical signals and electrical signals to sound signals.
2.Central exchange from where the subscribers are interconnected.
3.Wiring for connecting all the subscribers.
(c) Calculators:
It is a device used for carry out various mathematical calculations. The input required for calculator are as given below.
1.Power source (battery or solar panel).
2.Display device (LED or LCD)
3.Keypad containing all functions and numbers.
4.All electronic circuit devices.
Electronic Waste:
These are the waste electronic devices and if properly utilized may be valuable secondary raw material source for various electronic equipments and if thrown out may act as toxic due to presence of various toxic materials including lead, mercury, cadmium, arsenic etc. uncontrolled burning of these materials may also cause environmental problems.
Electronic waste is sometimes illegally sent to other countries for processing. However, due to complexity and difficulties in recycling, e-waste will remain an issue for the coming days.
http://www.articlejoe.com/Article/Consumer-Electronics/21085
The daily use of electronic equipments are known as consumer electronics and includes TV, telephone, DVD, CD, PC, laptop etc. These equipments are manufactured throughout the world. With the advancement in electronic engineering at a continuous pace, a number of new variety electronics items flood into the market every year and the cost the existing products reduces continuously and it is one of the biggest advantage of consumer electronics industry.
Electronic waste is one of the problems associated with these electronic item and many manufacturers are now planning to deal with these waste.
Semiconductor:
All electronic devices use semiconductors and without these semiconductors none of the electronic device is complete. Semiconductor behaves like an insulator at absolute zero (-273 degree centigrade) and can be distinguished from conductor that at this temperature the outermost filled electron energy band is completely filled in a semiconductor compare to the conductor in which the band is partially filled.
At room temperature semiconductor show a very small electrical conductivity much lower than that of conductor.
Doping in semiconductor:
Most common semiconductors used for electronic devices are silicon and germanium. Although some other conductors such as iridium phosphide, gallium arsenide and mercury cadmium telluride are also used.
A pure semiconductor also known as intrinsic semiconductor, when doped with electron rich element e.g. arsenic or electron deficient element e.g. boron in very small quantity, its conductivity increases and the resultant conductor is known as extrinsic conductor. My doping arsenic (electron rich) and boron (electron deficient) in silicon, we get n-type (negative type) and p-type (positive type) semiconductor devices.
We may create a p-n junction by doping different element in different region of semiconductor and the device is known as diode. Similarly we can create p-n-p or n-p-n junctions and the device is known as triodes.
Electronic Devices
(a) Television:
It is a device by which we can receive moving pictures and sounds over a distance. The whole transmission and receiver systems require the following inputs.
1.Camera for live images or flying spot scanner for transmission of films and sound source.
2.Transmitters for transmitting both images and sounds.
3.Receiver systems for receiving these signals.
4.Display device, which is either CRT, Rear projection, LCD or plasma. To display the signal in the forms of images and sounds.
(b) Telephone:
It is the device for communicating by which two persons can send and receive sound signals over a distance. The system requires the following inputs.
1.The telephone equipment, which converts sound signals to electrical signals and electrical signals to sound signals.
2.Central exchange from where the subscribers are interconnected.
3.Wiring for connecting all the subscribers.
(c) Calculators:
It is a device used for carry out various mathematical calculations. The input required for calculator are as given below.
1.Power source (battery or solar panel).
2.Display device (LED or LCD)
3.Keypad containing all functions and numbers.
4.All electronic circuit devices.
Electronic Waste:
These are the waste electronic devices and if properly utilized may be valuable secondary raw material source for various electronic equipments and if thrown out may act as toxic due to presence of various toxic materials including lead, mercury, cadmium, arsenic etc. uncontrolled burning of these materials may also cause environmental problems.
Electronic waste is sometimes illegally sent to other countries for processing. However, due to complexity and difficulties in recycling, e-waste will remain an issue for the coming days.
http://www.articlejoe.com/Article/Consumer-Electronics/21085
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