I think I killed my Arduino!

Forum 2005-2010 (read only) Hardware Troubleshooting
1

So, recently I found that I was going to need more amperage than my 1A power supply could deliver to my circut. So, I modified an old ATX power supply and turned it into a little lab power supply with 3.3, 5, and 12V outputs at 18A. I followed this tutorial to convert it, if it's relavant: Easily Convert an ATX Power Supply to a Lab Power Supply

Anyways, after I was done, I was stupid and hooked the new power supply to the Arduino's 5V and GND pins, instead of VIN and GND. Now whenever I supply external or USB power to the board all that happens is the built in LED on pin 13 flashes. I havent been able to find any reference to pin 13 flashing, is this some sort of error code? Am I screwed?

Billy

2

in case this is a brand new arduino, it will flash pin13 until you put on some code of your own.

3

Weird. There was a sketch uploaded before it started flashing. I re-uploaded the sketch and all was fixed. How could that voltage have corrupted my sketch but preserved the bootloader?

Oh well I'm just glad it works!