The wiring diagram for my simple desktop scanner. Full details at http://www.instructables.com/id/Build-a-DIY-Desktop-3d-Scanner-With-Infinite-Resol/
The wiring is pretty straightforward. The circuit is about as simple as can be. The only thing not shown is the 1602 LCD shield with buttons which sits on the arduino in the usual place. The power and ground leads from the arduino to the stepper driver will be soldered to the 1602 shield.