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Topic: what is the maximum output of a i/o pin of arduino uno? (Read 416 times) previous topic - next topic

zammikao

i read somewhere it is  40 mA so tell what will the output current  be if the output voltage of a pin is 5v and a 1000 ohm resistor is connected to the pin. will it be 40 mA or 5/1000 = 5 mA? Do reply

Grumpy_Mike

It will be 5mA.
The 40mA is the point where damage will occours. You will only get that flowing if the resistor is low enough.

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