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UPDATE 01/04/2012: Well, I've been doing yet even more work on this... I've now re-attached the upper chassis and started mounting the sensors to this. The sensors really are quite poor; they're supposed to have a 4-10cm range, but it's more like 3-4cm. Consequently, it's always bumping into things before the sensors are activated... However I have 4x HC-SR04 ultrasonic sensors on order from eBay; this should increase the detection range quite considerably. Once ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/arduino-powered-tamiya-grasshopper