H Bridge Pwm Dc Motor Control. Pwm is applied to the h bridge enable pins and this will also add pwm to the dc motor direction control pins. Power supply from vs pin the h bridge gets its power for driving the motors which can be 5 to 35v.
Another popular application is motor speed control. Being able to vary their speed with pwm increases the efficiency of the total system by quite a bit. The four h bridge dc motor direction control pins will now be pulled high or low depending on the motor direction required.
The output of pwm generator circuit is given to h bridge circuit through spdt switch.
Pwm is often used in conjunction with an h. These are dual h bridge motor drivers i e by using one ic we can control two dc motors in both clockwise and counterclockwise directions. The shunts are removed from the h bridge enable pins before connecting to the raspberry pi. The below circuit shows interfacing l293d with pic microcontroller to control a dc motor.
