I’m an IT teacher at a technical and vocational high school in Turkey. We have designed a line follower robot which we used mainly Pololu products on, and it won the first prize at The 3rd National Robot Contest (6 March 2009).
Thanks to Pololu for compact, high quality and inexpensive products, extensive stock and fast shipping.
Motor: Pololu 30:1 Micro Metal Gearmotor HP
Motor mounting brackets: Pololu Micro Metal Gearmotor Bracket Extended
Main wheels: Pololu Wheel 42x19mm
3rd wheel: Pololu Ball Caster with 3/8" Metal Ball
Motor driver: Pololu TB6612FNG Dual Motor Driver Carrier
Line sensors: Pololu QTR-8A Reflectance Sensor Array
Battery: ThunderPower 480 mAh 7.4V Li-Po
Microcontroller: Microchip PIC18F2550 at 20 MHz (10 ADC channels - 8 used)
Compiler: CCS C
PID period: 3ms
Velocity: 1.6 m/s
Turn radius: 25cm
Here’s the video: