Robin2:
Sorry to be blunt, but this is nonsense on several different levels.Even if the Uno was a 3.3v device neither it nor a Due can control a motor directly. Even if they could provide enough current the high transient voltages generated by motors can easily destroy an Arduino.
As I mentioned in Reply #1 all the Arduino can do is control the current passing through a MOSFET or h-bridge
...R
Sorry to be blunt, but you have not read my full post, so take the time to do so. You will see I referenced interfaces such as different transistors.
The main part of recommeding the Due is that its 3.3V regulator can output 800mADC, and that there are more than 6 PWM pins on the Due, not to mention the DAC pins.