LEGO robot: Light follower

RCX light follower robots using assembly language.

description

During my year in Denmark I got the great oportunity to work with LEGO robots. I really love them since I was child but I never had any chance before to play around programming them. This two robots were my first try into this funny world. I started making a simple one able to go to a light source using just one light sensor. It also could skip simple objects while colliding them. The second one uses two sensors and can follow a light source in movement in a faster and better way than the first one.

I can't go very deep into details of implementation because It's seems I've lost my sources from these robots and the fighter somewhere.
As soon as I'll get them back I'll update the pages and they'll be available to download. Anyway I'm going to explain the basic idea behind their "intelligent".

skipping and looking for light

The logic of the first one is quite simple: It starts turning to find the maximum value of light, and go forward till reachs it. If it founds some obstacles in its way it tries to skip them and after searches again for the source of light.

two sensors

This version of the robot features two light sensors and a more optimized logic that allow it to follow the light source faster and in a fancy way.
It goes comparing both values of light to determines the direction to the light. And if we're not going in this way, just turn to find it.

images

Both robots in action:

downloads

Nothing yet :(

comments

#1 posted by Wayne B at 2008-11-29 06:56:35

Thanks for sharing this and your other projects. I'm interested in seeing your source code if you find it...

#2 posted by rashi at 2009-01-24 09:40:07

please if you could send me in the main circuit diagram of ligt follower circuit using AT89C51 microcontroller since i need it for my project please reply soon

#3 posted by suresh at 2009-12-26 23:26:41

hi frnd, plz send me complete implimentation of this project.. reply me soon....

#4 posted by Benny at 2010-03-23 11:34:34

Hi dude Can you please send me the project? I´m really interested to know more about your work.

#5 posted by mmm at 2010-04-12 03:43:03

#6 posted by ironhide at 2010-08-10 12:23:34

Hey dude! im doing a similar project and would like to know how you implemented the light sensing(eg circuit diagram).

#7 posted by cperdue at 2010-11-21 15:38:49

I am look for help with MindStorm MNX 2.0. I need to understand the line reading program. I need to understand it to transfer that knowledge to students that are working on 2010 Body Forward Challenge. It need to be in such away that I get these young people to understand this technique.

#8 posted by jej at 2011-04-06 10:08:18

#9 posted by Nguyen Phi Quoc Tuan at 2011-04-18 08:57:01

Hey, can you send me your fully project. I like it and want to make one. I'm from Viet Nam so excuse for my English.

#10 posted by princess at 2011-05-21 04:22:10

hi can u send me circuit diagram for light traking robot

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