Controller

We use the PICAXE-18X chip on Revolution Education's PICAXE-18 Standard Project Board, which serves the purpose very well.

The board provides only on-off motor control, rather than bi-directional, but there is no requirement in this project for the vehicle to reverse or turn on the spot. We have a handful of the High Power Project Boards, which include an L293D motor driver, available for any students who feel bi-directional control is essential.

We have soldered screw terminals to the controller boards which greatly simplifies the interconnections. Connections to the Fischertechnic switches, lamps and motors are via 2mm plugs, and the infrared detectors have flying leads attached, so there is no need for students to make soldered connections.