• This DC Motor Speed Controller allows controlling the direction of a DC motor using a Pulse-Width-Modulated (PWM) DC voltage with a Duty Cycle fully adjustable from 0%-100%.The motor speed controller can easily provide a continuous current of 3A to your DC motor or other DC load. This DC Motor Speed Controller allows controlling the direction of a DC motor using a Pulse-Width-Modulated (PWM) DC voltage with a Duty Cycle fully adjustable from 0%-100%.The motor speed controller can easily provide a continuous current of 3A to your DC motor or other DC load.