The Answer is 42!!: How do you use PNP transistors
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Questions about using transistor to switch 12v LED · Issue #2688 · letscontrolit/ESPEasy · GitHub
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Transistor connected with a 12V relay (Hamid, 1999) In other to... | Download Scientific Diagram
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Transistor as a Switch - Using Transistor Switching
Using NPN 2N3904 as a switch for 12v DC fan. - Raspberry Pi Forums
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Transistors - SparkFun Learn
