Line Following Robot

Topics: Eye, Brain, Robotics Pages: 2 (508 words) Published: December 26, 2012
Lines following robots are the classic introduction to robotics. They use some sort of sensor, to detect a line and then ride on top of the line along the course. These robots teach basic construction and electronics techniques. This simple robot is designed to be able to follow a black or white line on the ground without getting off the line too much. The robot has four sensors installed underneath the front part of the body, and two DC motors drive wheels moving forward. This robot uses a comparator chip as its brain. A circuit inside takes input signal from four sensors and controls the speed of wheel’s rotation. The control is done in such a way that when a sensor senses a black line, the motor slows down or even stops. Then the difference of rotation speed makes it possible to make turns. Working Principle:

This Robot follows the black line which is drawn over the white surface or it follows the white line which is drawn over the black surface. The LDR’S (Light Dependent Resistors) are used to sense the line. When the light from the LED’S fall on the white surface, it gets reflected and if it falls on the black surface, it is not reflected this principle is used to scan the Lines for the Robot. Basically the Line following Robot is divided into four sections: 1. Input system

2. Processing system
3. Controlling System
4. Output system
Let us see each of them in detail:
Input system: In our project the input system is nothing but eyes, which will observe or detect the things around and will send signal to the brain accordingly, similarly in line following robots we need to have such eyes to detect the surface and once the type of surface is detected, it should send the signal to the brain. Basically the input system comprises of sensors which will act as eyes and will sense the surface that comes in its vicinity.

Processing System: Processing system is the brain which will take decisions depending on the input from...
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