Re: Motor Controller for Arduino
What magnitude of current draw do you anticipate?
For example, both this motor
and this motor
are nominally 12 V motors, but the first one has a stall current of 5 A, while the second one has a stall current 133 A. Thus, you can use a smaller (and cheaper) motor controller with the first motor than what you would have to use for the second.
EDIT 2: It also depends on how you've designed the mechanism that the motor is driving: motors aren't usually designed to be stalled for long periods of time, so usually you want to use some type of mechanical advantage that allows the motor to run more efficiently. In this case, you would probably not require a motor controller to handle the stall current in continuous usage.