Web30 de dez. de 2024 · I am trying to learn a simple LED circuit here. First, I am trying to light the LED with 3V and 20mA. Based on what I've learned, R1 should be 100ohm. (5-3)/0.02 = 100ohm. simulate this circuit – Schematic created using CircuitLab. I think I get it right so far (I hope.) Now I am trying to turn on/off the LED using a 2N2222A NPN transistor: WebLED On/OFF by a Switch using PIC microcontroller. Basically GPIO (General Purpose Input Output) Pin configuration and simulation are shown.
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