I will call one direction “forward” and the other one “reverse”, if it makes more sense to you just substitute “clockwise” and “counterclockwise”.

The two Input lines control the direction that the motor rotates. In order to simplify things a bit I’ll just discuss the inputs and enable for Motor A, Motor B functions identically. You will use these terminals to control both direction and speed or each motor. The board has four input terminals plus two enable terminals. The combined voltage drop is 1.4 volts, so if you are using 6 Volt motors you’ll need to give the board 7.4 volts, if you have 12 volt motors then your motor supply voltage will need to be 13.4 volts. This is due to the internal voltage drop in the transistors that form the H-Bridge circuit. Speaking of the motor power supply it needs to be a bit higher voltage than the actual motor requirements. If you do use the internal voltage regulator you’ll have to supply the motor power supply with at least 7.5 volts. An optional 5 Volt power input for the logic circuits.Power supply inputs for the motor power supply.The board contains an L298N mounted on a heatsink, a 5 volt voltage regulator to “optionally) provide power for logic circuits, supporting diodes and capacitors and connectors as follows:

You’ll find a few different styles of L298N boards but they all operate in the same fashion. Coupling the L298N H-Bridge to a microcontroller like an Arduino will give you the ability to control both the speed and rotation direction of two DC motors.In this article I’ll show you everything you need to know to start adding some motion to your next Arduino project. The inexpensive L298N H-Bridge module is a simple way to achieve that. If you plan on working with robots or just building things that move you’ll eventually need to learn how to control a DC motor. How to get satrted with the L298N Dual Stepper Motor Driver Controller Board

L298N Double H Bridge Motor Driver Module.

This module can use built-in 78M05 for electric work via a driving power supply part. Using L298N as the control chip,the module has such characteristics as strong driving ability,low calorific value and strong anti-interference ability.

L298n motor driver board module