How to control DC motor with L298N driver and Arduino.

L298N motor driver with Arduino

Hi, In this article you will learn, how you can control two DC motors with Arduino using L298N motor driver module

L298N motor driver module.

L298N H-bridge motor driver module is use to control two DC motor or a single bipolor stepper motor. By using this module you can control direction and speed of DC motors. This module support 5 to 35 volt DC.

In this module also have onboard 5v regulator. so if you are using 6 to 12v power supply then you have also have 5 volt output from the board.

Control DC motors with Arduino

When you want to drive DC motor with Arduino, you needs some sort of motor driver module which can run motors and control the direction and speed of the motors. L298N driver module is compact and best for this. In this post I have attached step by step demonstration video tutorial to control speed and diraction of DC motors with motor driver module, manually as well as with Arduino.

Video tutorial for controlling DC motors with driver module.

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Arduino code for L298N motor driver module.

// connect motor controller pins to Arduino digital pins
// motor one
int enA = 10;
int in1 = 9;
int in2 = 8;
// motor two
int enB = 5;
int in3 = 7;
int in4 = 6;
void setup()
{
  // set all the motor control pins to outputs
  pinMode(enA, OUTPUT);
  pinMode(enB, OUTPUT);
  pinMode(in1, OUTPUT);
  pinMode(in2, OUTPUT);
  pinMode(in3, OUTPUT);
  pinMode(in4, OUTPUT);
}
void demoOne()
{
  // this function will run the motors in both directions at a fixed speed
  // turn on motor A
  digitalWrite(in1, HIGH);
  digitalWrite(in2, LOW);
  // set speed to 200 out of possible range 0~255
  analogWrite(enA, 200);
  // turn on motor B
  digitalWrite(in3, HIGH);
  digitalWrite(in4, LOW);
  // set speed to 200 out of possible range 0~255
  analogWrite(enB, 200);
  delay(2000);
  // now change motor directions
  digitalWrite(in1, LOW);
  digitalWrite(in2, HIGH);  
  digitalWrite(in3, LOW);
  digitalWrite(in4, HIGH); 
  delay(2000);
  // now turn off motors
  digitalWrite(in1, LOW);
  digitalWrite(in2, LOW);  
  digitalWrite(in3, LOW);
  digitalWrite(in4, LOW);
}
void demoTwo()
{
  // this function will run the motors across the range of possible speeds
  // note that maximum speed is determined by the motor itself and the operating voltage
  // the PWM values sent by analogWrite() are fractions of the maximum speed possible 
  // by your hardware
  // turn on motors
  digitalWrite(in1, LOW);
  digitalWrite(in2, HIGH);  
  digitalWrite(in3, LOW);
  digitalWrite(in4, HIGH); 
  // accelerate from zero to maximum speed

 for (int i = 0; i < 256; i++) { 
analogWrite(enA, i); 
analogWrite(enB, i); 
delay(20); 
} 
// decelerate from maximum speed to zero 
for (int i = 255; i > 0; --i)
  {
    analogWrite(enA, i);
    analogWrite(enB, i);
    delay(20);
  } 

 
  // now turn off motors
  digitalWrite(in1, LOW);
  digitalWrite(in2, LOW);  
  digitalWrite(in3, LOW);
  digitalWrite(in4, LOW);  
}
void loop()
{
  demoOne();
  delay(1000);
  demoTwo();
  delay(1000);
}

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4 Comments
  1. CrystalRunner 6 months ago

    Arduino: 1.8.5 (Windows Store 1.8.10.0) (Windows 10), Board: “Arduino/Genuino Uno”

    C:\Users\User\Desktop\SKETCHES\DualHBridgeDCMotor_Sketch\DualHBridgeDCMotor_Sketch.ino: In function ‘void demoTwo()’:

    DualHBridgeDCMotor_Sketch:61: error: ‘i’ was not declared in this scope

    analogWrite(enA, i);

    ^

    exit status 1
    ‘i’ was not declared in this scope

    This report would have more information with
    “Show verbose output during compilation”
    option enabled in File -> Preferences.

    • Author
      admin 6 months ago

      Hi, Thanks for informing me. I have update the code, Please copy and past the code again it will work now. And Please let me know if you are still facing any problem.

      • subham mohanty 4 months ago

        yep its showing errors in code
        how can i correct it..//

  2. Matey Ankit 4 months ago

    I want to run 24v dc motor having 10kg torque, 30 rpm with the help of aurdino uno
    The motor must run only in one direction continuously
    Plz suggests me what to use and how to do programing

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