Item Type:Motor Driver Board_x000D_ Working voltage: DC7.5V-18V_x000D_ Working current: 3A_x000D_ Speed voltage: 0.25V-5V_x000D_ Speed range: 5%-100%_x000D_ Drive power: 30W_x000D_ Wiring instructions:_x000D_ 1. Control terminal:_x000D_ 5V: Driver board output voltage, external speed potentiometer when used (empty when not in use)_x000D_ ZF: Motor rotation direction control terminal, grounding or 5V can change the direction of the motor (can be left, the steering is fixed)_x000D_ VR: speed signal input, voltage 0.25V-5V (when the voltage of the motor is less than 0.25V the motor does not rotate)_x000D_ GND: shared control terminal_x000D_ 2, the output:_x000D_ Power +: Connect the positive pole of the power supply, the voltage is 7.5volts 18V ---_x000D_ Power - : Power ground, then power negative_x000D_ MA / U: Turn off every three wires of the motor_x000D_ MB / V: every three lines of the motor_x000D_ MC / W: every three lines of the motor