I need to power an Ardumoto Shield to drive two 12V DC motors. I was planning to connect a 12V battery to the Max 18V input on the Ardumoto and a 9V battery to the barrel jack input of the Arduino Uno. Can you tell me if this should be ok or if it would cause any damage to the Arduino?
It mentions in the Ardumoto hookup guide:
There's no mention of the Max 18V input on the Ardumoto.. Advice appreciated, thanks.