arduino pin13

vdefilip

January 17, 2018 14:46

None

When connecting a led direct to pin 13 of the arduino (without resistor) a warnig is displayed that there's to high a current through the led.
But if i'm not mistaken, pin 13 has a builtin resistor, so this is not possible.

thanks

Date Votes

1 comment

Tiffany Tseng January 26, 2018 00:36 Official comment

The built-in resistor is not used by default. You can enable it by specifying the pinMode:

pinMode(2,INPUT_PULLUP);

You can reach more about the internal pull up here: https://www.arduino.cc/reference/en/language/functions/digital-io/pinmode/

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