I am using an Arduino and two relays to control 12V DC motor in both directions.
For the first trials it worked fine. Finally, my Arduino was fried on another direction swtich.
I think there is something wrong in the schematic. I believe that Arduino was killed by reverse voltage spike produced by motor.
Probably I need a diode across the motor. However, I have two directions here.
So, what is the proper schematic for my task would be?
Here is my schematic.