ARDUINO UNO TO NANO

HI Pylon,

tks for answer and tks to all.
What i mean is "pin compatible for numbers" of course.

Pylon told not for the D13 , what that mean?
I use this pin D13 and D12 to test a contact and it is going to ground. is it the problem?

i think there a problem on the supply, near CC at this time over 9v on the main supply (12v normaly).

many thanks for help.

jym