Robert Ross

Engineering Projects - Line Following Robot

"A nice simple robot which follows around a line on the floor"

Believe it or not this took about a weekend to build (from tid-bits of time stretched over a month). Basically some IR LED's reflect off the surface and the reflection is measured by the photo-diodes. Base on this measurement we can determine where the robot is with respect to the line and program it to follow the line about. Software wise it uses a PID control algorithm - with currently only the 'P' part programmed in.


Line follower photos and video

Revision 2 - PCB Revision 2 with sensors temporarily taped into place with electrical tape Revision 1 - Close-up of populated PCB
The base is just an old CD. The sensor holder is part of an antistatic container for T0-220 package FETs Completed Revision 2 Completed Revision 2 - back view
The video!