hello,
I recently applied 12v to digital pin 3. And now itsn't the led is not responding when I connect to pin 3 but the led is responding when I connect it to other pin.
is there any easy fix, please help me!
Might be fried indeed…at least that pin is dead and who knows what other damage you made inside the microcontroller ….
The fix is to change the nano and learn from your mistake… 
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how should I figure it out what damage I did?
You can’t. Consequences of Abuse can appear later on….
You can check if each other pin is working fine as input and output and special functions but I would not trust that arduino
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ok, I was very excited because it was my first
nano and now I fried the pin...
Update: I never thought it will still work. I reconnected the jumper wire and the digiatl pin 3 works now perfect!
Lucky! But great news
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