I had my sketch uplaoded and everything was working fine when I tried connecting one of the input pins(pre-configured as digital INPUT) to 12V, just to see if this was being read as a HIGH as well. It seems to have done something and the board stopped working. Moreover, all pins seem to be stuck at HIGH!
So far Ive tried the following:
- reset button: doesnt help
- re-upload: doesn't work - it says not in sync
Physically nothing seems to be burnt/blown. What am I missing? Have I fried my board? I hope not. PS: It was connected to a 12V external power source