This is Lunchbox, a line Following robot built as a technology demonstrator for a competition at my local hackerspace. The competition rules state that you must build a line following robot that will complete the course in the fastest time but you are not allowed to use a microcontroller or any programmable piece of silicon.
I tested it on my trusty magcian chassis before I put it in its permanent "chasis". Unfortunatly I did not take a picture of the line sensors and the robot is allready at its new home.
The big resistors was in an effort to slow down the motors since it kept speeding over the line. In the final version I used a LM350 voltage regulator to drop the voltage to the motors.
The gearboxes were taken from cheap toys and the front castor is from a tub of "alien goo" candy.
The schematic is from the book 123 Robotics Experiments for the Evil genius by Mike Predko.
The stripboard layout was done in DIY Layout Creator. The resistors and layout for the line sensor was seperate.
And a movie of lunchbox in action:
If the embedded video does not show, here is the link: