Hello! I have a new Arduino Uno R3 and I'm a little bit surprised... Even I let setup() and loop() empty or I call digitalWrite(13, 0) in setup(), the onboard LED turns on a little bit / sometimes bright if I put my finger on the back of the board or if I just put the board on my desk. Can plea…

LED 13 turns on unexpected

totti1001 March 10, 2024, 10:19pm 6

Ok, you are right, thank you very much. Configuring the pin as an output solves this issue. But why this do not happen by firmware at initial?
Best regards

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LED 13 turns on unexpected

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