Just finished the Control Board design for the CT scanner. It´s based on an ATmega8 from Atmel.
It uses a small form factor microstepping IC from TI with 1A current capability to drive the rotary table.
Relais are included to control the X-Ray generator and the digital camera.
An USB connector enables a terminal connection to parametrize the control board with a PC.
Finally there is a switch to START/STOP the scan and two status LEDs.