Turntable for David 4 & 5 & HP 3DScan & more

I originally made this turntable to automate structured light scanning with "DAVID Laserscanner 4". But since the table is accessed via the serial port, it should be useable with a great number of scan setups.

At the heart of the turntable are a ChipKit Uno32, an Adafruit motor shield and a NEMA17 step motor.
Complete build instructions and firmware are available here:
https://sites.google.com/site/janbeck/3d-scanner-turntable-for-david4

Since then, the new version (DAVID5 has been bough