Motor Drivers Modules

Post author:Farees Ahmed
Post published:January 26, 2021
Reading time:2 mins read

An H bridge circuit is used to control the direction of rotation of the Motor. It consists of 4 switches. When switch S1 and S4 are closed simultaneously and switches S2 and S3 are open, positive voltage to the Motor which drives the motor clockwise.

When switch S2 and S3 are closed simultaneously and Switches S1 and S4 are open, negative voltage will be applied to the Motor which rotates the Motor in the counter clockwise direction.

L298N pin out : L298N is a dual H bridge motor driver which can be used to control two Motors.

Pin Number	NAme	Description
1,15	Sense A, Sense B	The Sense Resistor is connected between this pin and ground to control the load.
2,3	Out 1, Out 2	Output pins of the bridge A, the current that flows through the load connected between these two pins is monitored at pin 1.
4	Vs	Supply Voltage for the power output stages. A 100nF Capacitor must be connected between this pin and ground.
5,7	Input 1, Input 2	TTL compatible inputs of bridge A.
6,11	Enable A, Enable B	Low on this pin disables the corresponding bridge.
8	GND	Ground pin
9	Vss	Supply Voltage for the logic blocks.
10,12	Input 3, Input 4	TTL compatible inputs of bridge B.
13,14	Out 3, Out 4	Output pins of bridge B, the current that flows through the load connected between these pins is monitored at pin 15.