This is another one of the small projects that I have going at the moment (very, very early stages). In the picture is a Devantech CMPS03 on an arduino board. This is for my work with electric wheelchairs. I know some kids with severe physical disabilities, and the control interface for the wheelchairs leaves a lot to be desired. It is a one button interface, the wheelchair can only travel in certain pre-set directions. Since this control system doesn't allow you to correct for drift in the same way that the joystick does trying to travel in a straight line is impossible which is really annoying if you want to get anywhere.
The idea is that I can use the digital compass to keep the wheelchair on a straight heading. I really want this to be something that I can just plug in between joystick and the motor driver, if the values coming from the joystick for the left and right motors are the same then the compass will correct for any drift.
I'm using the wiring library from here http://www.grapelabs.de/index.php?id=52
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