Hello, I Was wondering: I have a variable resistor (well, actually a tamiya mechanical speed controller, but they work the same) and its rated at 8.5vdc max, but I need to drive a motor with it that requires 12vdc (the motor draws 4 amps, and the var. resistor is rated at 200 or something so thats not a problem) But would anyone know how to make the resistor still drive the motor without burning it out? thanks for all help.