Each HG7881 (L9110) chip is able to drive a single DC motor using two digital control inputs. One input is used to select the motor direction while the other is used to control the motor speed. Speed is controlled by using PWM Pulse Width Modulation.
The HG7881 (L9110) Dual Channel Motor Driver Module uses two of these motor driver chips. Each driver chip is intended to drive one motor, so having two means that this module can control two motors independently. Each motor channel uses the same truth table as above. Each set of screw terminals is used to connect a motor. Refer to the table below for pin header connections.
