Arduino Uno + Dagu 4 channel motor controller - power issues?
I have an Uno controlling a 4 channel Dagu motor controller with encoder support. Got this a month ago. (It's the red PCB version).
Although it works, I have read that I shall not power the motors before powering the control logic.
But does that really mean that if the controller voltage dies out in the field, and there's still juice in the motor batteries, the Dagu controller will burn ?
I saw OddBot said this might be the case, at least if you powered it up in the wrong order.
I have asked around on other forums and people seems to think this would be a rather dangerous design :D
People suggest that if this is truly the case, I could hook up some kind of transistor circuitry to make sure motor power is cut if controller power is cut. At the moment, this is a bit above my electronics skills.
Can anyone confirm or deny that the Dagu board will burn if the controller logic voltage dies while the motor still has voltage ? (AFTER it has been powered up properly :)