Backlighting This is how the Backlighting is done. I use an ATX Power Supply to give me the d.c. for the LED's. This P.S.U. also delivers 12v, so I have hooked up 10 MES bulbholders around the frame and switch them thru the Panel Light Switch.  Here's a couple of shots of my OLD SYMULATORY PANEL to give you the idea. Things You Will Need These are the long paddle Toggle Switches you will need.  In Europe, you can get them HERE and in the US you can get them HERE Taiwan Alpha Rotary Switch Available in all switching formats and combinations just about anywhere. In the UK, get them HERE. This is a Pulse Switch which operates in both directions. It contains two switching circuits. One switches in the Clockwise direction and the other switches in the Anti Clockwise direction. You get one ON/OFF sequence per detente.  Only the switch in the operating direction works.   It is a momentary switch which can give you one or repeated switching actions in both directions. Hook it up to your keyboard encoder or Joystick controller and you now have a rotary control. Heres the DATA SHEET LED's, use High Intensity LED's because there's nothing worse than a dim indicator. You are going to need Blue, Green, RED and Amber. POWER SUPPLY A 500w (or better still a 650w) ATX Power Supply is going to give you all the power you need on the overhead. 12v, 5v, 3v and 2v are all readily available from this