L298N Motor Driver with Arduino Nano - Full Tutorial

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1. Arduino Nanoor equivalent.
2. HW-130 Motor Driver:
   • To control the motors.

1. 1 DC Motors with Gearbox:
   • Two motors grouped for left-side control and two for right-side control.

1. Ni-MH AA 2400mAh Battery Pack:
   • For powering the motors.

1. Breadboard and Jumper Wires:
   • For connecting the IR receiver.

  CONNECTION OVERVIEW 

• ENA → D9 (PWM speed control) 
• IN1 → D8 
• IN2 → D7 
• Potentiometer → A0 
• Battery → L298N VIN & GND 
• Motor → L298N OUT1 / OUT2 
• Common ground between Arduino and L298N

// DC Motor Speed Control - Arduino Nano + L298N + Potentiometer

const int ENA = 9;   // PWM pin

const int IN1 = 8;   // Direction pin 1

const int IN2 = 7;   // Direction pin 2

const int POT = A0;  // Potentiometer

void setup() {

  pinMode(ENA, OUTPUT);

  pinMode(IN1, OUTPUT);

  pinMode(IN2, OUTPUT);

  // Set motor direction (forward)

  digitalWrite(IN1, HIGH);

  digitalWrite(IN2, LOW);

  Serial.begin(9600);

}

void loop() {

  int potValue = analogRead(POT);           // Read potentiometer (0–1023)

  int motorSpeed = map(potValue, 0, 1023, 0, 255);

  // Optional: avoid motor buzzing at low values

  if (motorSpeed < 40) {

    motorSpeed = 0;

  }

  analogWrite(ENA, motorSpeed);             // Send PWM to motor

  // Debug (optional for video)

  Serial.print("Speed: ");

  Serial.println(motorSpeed);

  delay(20);

}

1. Assemble the Circuit:
   • Connect the motors, motor driver, and IR receiver as described.

1. Upload the Code:
   • Use the Arduino IDE to upload the code to your Arduino Uno.

1. Adjust Speed:
   • Modify the motor speed with potentiometer.