In this high level introduction to bipolar junction transistors (frequently known as BJTs), Josh goes over some of the higher level topics of BJTs, talking about the symbol, introducing the base, collector, and emitter, and going over their applications as either a switch or an amplifier. As this topic is surprisingly indepth and can be quite complicated, we highly recommend checking out our other tutorials about BJTs as well to get a more comprehensive understanding of how these fundamental electronic components work.

And here's the written tutorial JB put together on using a BJT as a switch: https://www.circuitbread.com/tutorial...

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