H Bridge Pwm Motor Control. Here is the complete circuit. You could theoretically use just the two pwm outputs however you need to be careful about the polarity of the signal compared to the transistor you re driving.
If q1 and q4 are turned on the left lead of the motor will be connected to the power supply while the right lead is connected to ground. To do this we ll be using an h bridge chip and sending it the appropriate control signals with the pwm expansion the h bridge will then take care of running the motor. Controlling a dc motor using an h bridge for this expriment we ll be controlling a motor using the pwm expansion.
If q1 and q4 are turned on the left lead of the motor will be connected to the power supply while the right lead is connected to ground.
An h bridge full bridge driver is quite popular in driving loads such as brushed dc motors and it is widely used in robotics and industry. Finally we need transistor h bridge circuit to alter the direction of dc motor and ic ne555 based pwm generator circuit to vary the speed of dc motor. The main advantages of using an h bridge driver are. The l298n is a dual h bridge motor driver which allows speed and direction control of two dc motors at the same time.
