Motor Driver Shield

With a 16-pin DIP package, L293D integrates a bipolar H-bridge circuit internally. The bipolar PWM method has many advantages: continuous current, four-quadrant operation of motors, smoothness during low speed, micro-vibration currents when the motor stops (which as dynamic lubricator can eliminate static friction during the motor forward-inverse rotation), etc.L293D generates enable signals by an internal logic circuit. The input of the H-bridge circuit can be used to define the direction of the motor rotation when the enable signals, for PWM. Besides, it integrates two H-bridge circuits onto one chip, which means one chip can control two motors simultaneously.Each motor needs three kinds of control signals: EN12, IN1, and IN2. Within, EN12 has enable signals, when IN1 and IN2, motor rotation direction ones. When IN1 and IN2 are 1 and 0 respectively, the motor rotates forward; or else, it rotates inversely. Connect the PWM pins with pin EN12 and then you can change the rotational spee