If I use a 2.2K Ohm resistor on an 5 Volt Arduino output pin, according to Ohm's law, the amperage calculates to about 2.7 milliamps.
But knowing thata resistor reduces voltage and amperage,
I tested the voltage after the resistor and it reads 2.9 volts but I don't how many milliamps the Arduino
My goal is to limit, as much as possible, the current used by each pin on my Arduino by offloading each circuit's output device with a darlington.
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