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The description about the cases are given below.

The robot needs to perform 4 sets of motion which includes moving forward, turning left, turning right and coming to a halt. Both motors rotate on the basis of the signal received from the left and the right sensors respectively. How does a Line Follower Robot Navigates?Ī typical line follower robot has two sets of motors, let's call them left motor and right motor.

Using the stated principle, we control the movement of the robot by driving the wheels attached to the motors, the motors are controlled by a microcontroller. The IR sensors emits the infrared light on an object, the light hitting the black part gets absorbed thus giving a low output but the light hitting the white part reflects back to the transmitter which is then detected by the infrared receiver, thereby giving an analog output. The transmitter is basically an IR LED, which produces the signal and the IR receiver is a photodiode, which senses the signal produced by the transmitter. Infrared sensors consist of two elements, a transmitter and a receiver. We have covered a detailed Arduino IR sensor tutorial which you can check to learn more about the working of IR sensors with Arduino Uno. We then place the robot on the line such that the line lies in the middle of both sensors. To detect the line, we place two IR sensors one on the left and other on the right side of the robot as marked in the diagram below.

For this project, we are going with the IR sensor because of its higher accuracy. To detect light, either LDR (light-dependent resistor) or an IR sensor can be used. So, we are going to use this property of light to detect the line. We all know that the reflection of light on the white surface is maximum and minimum on the black surface because the black surface absorbs maximum amount of light. Now the question is how to implement the line sensing mechanism in a LFR.

You can see the demonstration video of the Arduino Line Following robot-Īs stated earlier, line follower robot (LFR) follows a line, and in order to follow a line, robot must detect the line first. The LFR is quite an interesting project to work on! In this tutorial, we will learn how to build a black line follower robot using Arduino Uno and some easily accessible components. Line Follower Robot ( LFR) is a simple autonomously guided robot that follows a line drawn on the ground to either detect a dark line on a white surface or a white line on a dark.