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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 percent 100 percent. The motor speed controller can easily provide a continuous current of3a to your DC motor or other DC load. Main technical parameters: input supply voltage: 6v28vDC the maximum output power: 80w the maximum continuous output current: 3a duty cycle adjustable: 5 percent 100 percent quantity: 1pc operating instruction: 1. Connect your DC motor (or DC load) to the motor terminals as indicated on the wiring diagram. 2. Connect a voltage of 10v36v DC to the circuit making sure of the correct polarity of the connection. Note that the voltage applied to the motor will be supply voltage applied to the circuit. It is recommended to add an appropriately rated fuse inline with the positive supply in order to protect the circuit from any possible short circuits. 3. You can now control the speed of the motor through potentiometer. Package included: 1 x DC 6v 28v 3a pwm motor speed variable regulator controller switch