I have ext power for 2 servos, another ext power for uno, and now for prototype purposes I want to hook up an adafruit motor shield to a variable dc supply via the shields ext terminal block. Is this a problem? Too many pokers in the fire per say? Any one with experience with this shield?
Bigger experts than me claim that it is all OK as long as you connect the ground of all of the dc power supplies together.
So for example, they all are grounded to the uno ground?