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Summary: Learn how transistors work in an electric circuit in this free home maintenance video.
Ross has worked for several years in information technology, helping to maintain the servers and customer accounts that allow access to shared information. He also provided answers on...read more
" Hello! This is Ross on behalf of expertvillage.com. This is a transistor. Use them in amplifiers as a matter of fact, computer chips, use transistors in them for their ones and zeros where the way up but the transistor creates a amplifier because what happen in this is a schematic symbol, there are three connection to it. This is what is called an NPN transistor based upon its construction it is a semiconductor meaning that it does not conduct and it is not an insulator either, but it can be varied based upon the voltage to the base. So more of voltage the more output. So we have a small signal coming in you will amplify that signal and you can put different components to determine how much it will amplify it. Transistor, this is a big one, by the time she will see the little ones this is a big one they can handle a lot more current so that we will get more amplification out of it."
eHow Article: How Transistors Work in an Electronic Circuit
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Comments
techart said
on 10/22/2009 Nice try... one mistake, transistors are current devices, tubes are voltage devices. The base current of a transistor controls the collector-emitter current. A small base current controls a larger collector-emitter current. Different transistors have different amounts of gain [ratio of base current to collector-emitter current]. Gain is typically refereed to by the letters hfe. There are common pin outs for transistors, but some part numbers have different pin outs. Large transistors can dissipate more heat. Transistors like the one in the video often are used with a heat sink and socket.
gugg said
on 8/2/2008 The schematic of the transistor is wrong.