Let's Make Robots!

NXT Line Follower

Smoothly follows a black line

The robot measures line position with the 4 line sensors and feeds this to a PD-regulator which in turn produces the two motor outputs. This setup gives a smooth line following.

The cost of the robot is roughly the cost of a set of MINDSTORMS NXT + 3 additional NXT light sensors and the rechargeable battery.

The time to build includes several mutations of the basic design - time flies when you play with LEGO ;-). Of course some time was spent finding some usable values for the P and D constants for the PD-regulation.

I used the Bricxcc IDE for developing the controller program.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
awsome robot it looks pretty kool. i like NXT aswell.
Welcome, JIPPI!!