Used televisions

The main aspect that differentiates high-definition televisions from their standard definition counterparts is their ability to decode a much higher resolution for video. Video on a television is made up of a series of lines on the screen. Each of these lines carries a different part of the image. Standard definition TVs support... more »

Seems like just yesterday that when you were buying a television set, all you needed to know was how big a TV you needed, and you were good to go. You have much more to choose from today, thanks in large part to the introduction of high definition television, or HDTV. HDTV has brought a new standard for television clarity, and as a... more »

The bright, colorful images tempt you to spend your hard-earned cash on a new digital TV. Not only will it take up far less space in your family room, the large picture and color approximate going to the movies. However, what about all those unusual acronyms and terms? Unless you know what they mean, you will not be able to make an... more »

A transistor is made of at least three external terminals on a piece of semiconducting material. The three terminals are labeled as the base (b), collector (c) and emitter (e). The most important part of a transistor is the semiconductor, which is generally made of materials such as silicon. This semiconductor is the rectifier and... more »

Portable TVs have evolved tremendously. Gone is the bulkier small TV that runs only on analog. They now come in digital format with a sleeker, flatter and more modern look. They also come with batteries and remote controls unlike their predecessors. They provide high-definition TV viewing almost as clear as the bigger TVs. With more... more »