ober WROTE:Well, the advise is still to use battery.
Yeah unfortunately a battery just isn't going to work for me. If that's really the solution I can always try a different motor shield. That would be unfortunate.
ober WROTE:Since there is no battery, you will need to use huge electrolytic capacitor and parallel with the power supply, with the hope the capacitor can adsorb the fly back voltage generated when the motor is slowing down.
How big of a capacitor are we talking here? I'm just fine with math and such, but I'm not familiar with any sort of equations that would suggest how much flyback voltage is being generated, etc.
I guess I'm also still a little confused on why a flyback diode wouldn't work. In fact, since my motor will only ever turn in one direction, couldn't I use a number of diodes to ensure the current only goes into the motor in one direction, and then just let the motor dissipate that power in heat?
ober WROTE:And how is your UNO is being powered? Using the same power supply as the motor driver shield?
The Uno and the shield are being powered by a small USB power adapter. That is separate from the 12V, 5A power adapter that is also connected to the motor shield to drive the motor. Both are plugged into the same power bar, if that matters any.