![]() And this channel can carry a much larger current. When I say “turn on”, I mean that the transistor will open up a channel between emitter and collector. ![]() The PNP transistor has the same leg names as the NPN:Ī PNP transistor will “turn on” when you have a small current running from emitter to base of the transistor. Note: This topic is much easier with an understanding of current flow and voltages. They work pretty much in the same way, with one major difference: The currents in the PNP transistor flow in the opposite directions of the currents in the NPN transistor. If you understand the NPN transistor, it will make it easier to understand the PNP transistor. ![]() ![]() If you haven’t already, I’d really urge you to read that article first. In my article how transistors work, I explained how a standard NPN transistor works. If you want to design circuits with transistors, it’s really worth knowing about this type of transistor.įor example: Want to automatically turn on a light when it gets dark? The PNP transistor will make this easy for you. ![]()
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