The average voltage is proportional to the width of the pulses known as Duty Cycle. PWM is a technique where average value of the input voltage is adjusted by sending a series of ON-OFF pulses. A common technique for doing this is to use PWM (Pulse Width Modulation) The speed of a DC motor can be controlled by varying its input voltage. H-Bridge – For controlling rotation direction.This can be achieved by combining these two techniques. In order to have a complete control over DC motor, we have to control its speed and rotation direction. Supplies power for the switching logic circuitry inside L298N IC Motor B input pins. Used to control the spinning direction of Motor B Motor A input pins. Used to control the spinning direction of Motor A Internal circuit diagram of L298N Motor Driver module is given below:

When the power supply is less than or equal to 12V, then the internal circuitry will be powered by the voltage regulator and the 5V pin can be used as an output pin to power the microcontroller. The jumper should not be placed when the power supply is greater than 12V and separate 5V should be given through 5V terminal to power the internal circuitry.ĮNA & ENB pins are speed control pins for Motor A and Motor B while IN1& IN2 and IN3 & IN4 are direction control pins for Motor A and Motor B. The L298N Motor Driver module consists of an L298 Motor Driver IC, 78M05 Voltage Regulator, resistors, capacitor, Power LED, 5V jumper in an integrated circuit.ħ8M05 Voltage regulator will be enabled only when the jumper is placed. L298N Module can control up to 4 DC motors, or 2 DC motors with directional and speed control. L298N Motor Driver Module is a high power motor driver module for driving DC and Stepper Motors. This module consists of an L298 motor driver IC and a 78M05 5V regulator.

L298n motor driver pinout