I've got a DC motor driving a ACME screw that moves a lever. The joint of the lever has a pot on it for position feedback. I decided to use a TLE 5206 Motor Driver to control the motor from the Arduino. I like the fact that you can send pulses to the TLE 5206 to control the motor's speed.
Anyway, the motor is 12-24V, 3A peak, so obviously I need external power (I'm using a 4 cell LiPoly battery for power). But I'm not sure how to wire it. the TLE 5206 only has one Vs and one GND, so I guess I put the LiPoly positive to Vs, but what about the ground? Does the Arduino have to be powered off the battery too and they then have a common ground? I was planning to power the Arduino separately because the battery is around 14V, and I don't want to cook the voltage regulator on the Arduino board. How do I do this? Thanks!