I'm looking to recover from a rookie mistake I made while working on a 12Vdc power supply. My multimeter was reading a 11.8Vdc output off a voltage regulator, and I thought 'Hey I have a sketch that turns my Uno into an oscope'. Not a good idea. As soon as I touched the probe to the output my Arduino and laptop instantly shut down. No smoke or visible damage to either. When I plug the Arduino into a usb wall adapter the LEDs come on. I'm really hesitant to connect it back to my comp.
What should I be looking for in to test for damage? The probe was grounded and fed into analog 0. Is this PIN toast? Is the board safe to hook back into the computer?
Any and all answers/suggestions are greatly appreciated. Live and learn I guess.