![]() I decided I’d use this information to build two circuits - one for the NPN and another for the PNP transistor - to simply drive an ultra-bright white LED. Specifically for the NPN, it was for the PNP, it was. ws for the two types of bipolar transistors. I started with the very basic transistor schematics I found on. I’ll start by showing the two circuits I put together which demonstrate that - at least sometimes - one can use NPN and PNP transistors for the same task. The only relationship between these two questions is a transistor. Does anyone have a circuit that does not require an IC?Ġ6193 - Transistor Confusion, Donald Bodine, Middleham, UK What determines which type of transistor to use in a given circuit? Are they interchangeable with those of a different type that I may already have on hand? ![]() The questions were:Ġ6192 - LED Fader, Cindi Carrillo I need a simple method to slowly fade an LED from bright to dim, then to bright again in about two seconds, then keep repeating. ![]() This article started as an attempt to answer two questions posed in the Tech Forum here in Nuts & Volts.
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