Ddemetrius456.
Hi. I don't work with a circuit diagram, but I'll list the main components I used.
LED is the Cree XP-G. The red light shown above uses R5 bin, but the beam shots are of the XP-G R4 bin (an earlier prototype). As you may know, the R5s are slightly brighter than the R4s. I get them from cutter electronics, Australia.
The light uses 6 LEDs.
These are connected in series and hooked up to a TaskLed LED driver, the MaxFlex5. TaskLed are good and theres a lot of addional info on the product on the website. They're easy to use and all the wiring holes on the board are labelled.
If you use the Maxflex, then I think you'll need a momentary, "normally open" switch. Current favourite seems to be the APEM, push button switch. You can source them from RS.
I've used a sureseal connector in the past, they're really good and inexpensive, but a bit fiddly to assemble. Again you can source them from RS.
Oops !, nearly forgot. LED "optics", as they are referred to these days, are sourced from cutter also. currently I mostly use the carclo 10mm square optic, also compatible with the cree XP-E LED.
Off the top of my head, thats about it really.
I hope this helps. If you build anything, I hope you post it.
Luminous