Hi Headroom,
I will try to draw a schematic by hand to upload it soon. By the way, did you accomplished powering led driver by using only one 9v Battery on Arduino and nothing else?
Right now i'm considering going through digital pin OUTPUT, 5V 40ma to LM317 + 1.8Ohm to pulsate the Led. As described on Instructables -> http://www.instructables.com/id/Super-simple-high-power-LED-driver/?ALLSTEPS
Any chance that this would power the led bright enough?
Thanks for the board help!