Line follower, obstacle avoider, photovore and photophobe in $40

Submitted by Pratheek on January 10, 2008 - 7:33am.

Line follower, obstacle avoider, photovore and photophobe in 40$

Overview

 

 

 


This tutorial details the construction of a simple and low cost robot. The robot is mainly a line follower but can also be used as a photovore, a photophobe, and obstacle avoider!And all this for less than 40$. The best part is that the robot does not use any microcontroller, which means you need no expensive programmer or even a computer to program your robot. This tutorial is mainly aimed at beginners, hence I have tried to keep the robot as simple and cheap as possible. With only a few parts you can get this robot up and going. Here is a video of the robot following black line.

 

Specifications and Features

• The sensor used are four LDRs and LEDs.
• The steering method used here is differential drive.
• The actuators used are two 100 rpm DC motors.
• One 9V battery provides power to the robot.
• The robot can follow a dark line on a light surface or a light line on a dark surface.
• A LED is switched on when the robot is on the line (this makes things easier during debugging).
• It can also be used as a photovore, photophobe, and obstacle avoider.

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Curious

I'm just curious if the robot can do sharp turns in the line. Nice project, and for under $40 , WOW

Even I'm curious about that

Even I'm curious about that and I am currently building a track with sharp turns. Once done I will post the video of robot following the track.