A line follower robot is an autonomous vehicle that detects and follows a line, typically a black line on a white surface. Below is a step-by-step guide to building one using Arduino.

Components Required

1. Arduino UNO

2. L293D or L298N Motor Driver

3. 2 IR Sensors

4. 2 DC Motors with Wheels

5. Chassis (Robot Body)

6. 7.4V or 9V Battery

7. Connecting Wires and Tools (e.g., soldering iron, screwdriver)

Steps to Build

1. Assemble the Hardware

• Chassis Setup: Attach the motors and wheels to the chassis.

• IR Sensors: Place two IR sensors at the front of the robot, ensuring they are positioned to detect the line (5mm above the surface).

• Motor Driver: Connect the motor driver to the motors and Arduino. Left motor → Motor Driver M1 Right motor → Motor Driver M2

• Power Supply: Connect the battery to power both Arduino and motor driver.

2. Circuit Connections