Robots and Physical Computing

Recently I have been playing with the CrumbleBot (http://4tronix.co.uk/store/index.php?rt=product/product&product_id=493 ) based around the Crumble Controller ( http://redfernelectronics.co.uk/crumble/ ) providing a intuitive graphical interface (similar to Scratch) to control two motors and four inputs/outputs. The CrumbleBot comes with line-detecting sensors and Light-Dependent Resistors for light detection, with a few other features that I have yet to play with. So is nice little framework for simple robotics. Make sure you order the Crumble Controller at the same time as CrumbleBot. Building the 'Bot' is relatively simple and 4Tronix have provided some easy to follow instructions on-line ( http://4tronix.co.uk/crumble/CrumbleBot.pdf ) that are almost foolproof (I manage to build it!). So I wanted to experiment with making a edge following robot - where the robot goes around a line by following the edge of the line. The idea is while make small movements, Check th...