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How to Line Tracking with LEGO Mindstorms + leJOS
Spoogy  [1 posts]
16 year
Hello,

I am trying to write an algorithm for Line Tracking. But I have no good ideas.

What do I have:
- LEGO Mindstorms
- NXT (leJOS: kind of JAVA)
- Driving Robot availible
- ColorSensor in Combination with LightSensor
or
- ColorSensor in Combination with CompassSensor

What do I want:
- Following a path
- Turn left or right on Crossroads (They are coded with colors 6cm before the crossroads appear)

My Idea:
- While (Black) driveForward
- CompassReset (to Zero)
- if (white && CompassSensor!=0)  rotateTo(0°)

Anyone any good idea? Thank you very much!
Greetz Spoogy
Anonymous 16 year
Spoogy,

This seems to be a very straightforward algorithm that has been coded many times for the Lego NXT. Perhaps you can check google to see if anyone has a script already built that can do this. Lego even comes with a line following script that you can perhaps modify.

If you're using LeJOS there must certainly be algorithms written to do such a thing. Perhaps some of the more lego centric sites like

http://thenxtstep.blogspot.com/
http://nxtasy.org/
http://www.motocube.com/
http://www.bnxt.com/
http://www.nxtclub.com/
http://legoeducation.info/nxt/  
http://us.mindstorms.lego.com/nxtlog/projectinsert.aspx

might be helpful.

STeven.

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