H Bridge Pwm Motor Control. High efficiency rotation direction change and braking the motor. Pwm is applied to the h bridge enable pins and this will also add pwm to the dc motor direction control pins.
The shunts are removed from the h bridge enable pins before connecting to the raspberry pi. Current starts flowing through the motor which energizes the motor in let s say the forward direction and the motor shaft starts spinning. Let s take a closer look at the pinout of l298n module and explain how it works.
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.
Controlling a dc motor using an h bridge for this expriment we ll be controlling a motor using the pwm expansion. The output of pwm generator circuit is given to h bridge circuit through spdt switch. 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.
