Today I fried an Arduino and I am not sure why. I suspect it has someting to do with my big forklift relay.
I have an SBEC (UBEC?) which powers my Arduino and the big forklift relay with 9V and usually 0.6A. The Arduino and the Relay share the same power supply. Could it be that the relay produces some kind of current in the Arduino when it turns on and off? It worked about 10 times in a row and then the Arduino was toast.
I never got this whole back EMF in school, and I don´t get it now. Did this kill the Arduino?