Monthly Archives: August 2011

Hurricane Evacuation Kit

Hurricane Irene is heading up the coast towards North Carolina and may be making land fall fairly close to where I live, so I thought it would be a good idea to get an evacuation kit together. I also realized … Continue reading

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The push on push off transistor switch

You’re probably familiar with single button on/off switches. Most of the ones you see now on devices are IC logic switches but there was a time when these types of switches used transistors only. I can remember when the first … Continue reading

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Class AB Audio Amplifier

This week we’ll take a look at another type of audio amplifier, the class AB amp. As we saw in Hack #19 the class A amp has a transistor that is biased with a voltage that makes it essentially stay … Continue reading

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The Single NPN Transistor Audio Preamp

Here’s a great little project that goes well with the LM386 audio amp. It’s a good first time transistor project because it’s simple and demonstrates the common emitter class A amplifier circuit with only six components in the signal path. … Continue reading

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