Check out some of my gizmos:
Note: Use this information at your own risk.
No guarantees on the accuracy of the schematics, code, etc.

 Auto Fill Circuit for Laser Cooling Loop (W/Ethernet Data Logging)
 Phase Detector (i.e. which phase is this outlet on?)
 Four Zone Temperature Controller with 0.01C Stability
 Laser Temperature Controller using Stepper Motor
 Lockin Amplifier
 Laser Beam Blocker
 Displacement Measurement System
 Temperature to RS232 Converter
 Five Channel Deflection Plate Driver
 Laser Mode Counter
 Laser Diode Controller
 Stepper Motor Controller
 Dual 16 Channel Opto-Isolator
 Delay Generator