Well I got time to poke more throughly through the LT1618's datasheet... Look at the top schematic on page 10. I'm not sure what the levels of the pwm is for that, but you could just clamp it with a resistor in series with the output of the µC and a few diodes in series from after the resistor to ground, or a zener if you can find ones of the correct voltage. Thats what I get for not looking through all of the datasheet before hand
I've been busy building again, and have finally built a second unit. I got a chance last night to do a bit of spinning, and took along a mate (the guy in black) for some testing. Here's the first ever public outing of my Luxeon Poi. I'd just like to say a big thanks to all of you who have contributed to this thread - you've helped me enormously, and I probably wouldn't have gotten to where I am now without you.. so cheers guys!
hmm u wernt at fabric last night were u? someone had like a flashy glow stick, made me think of this thread. (if u were room 3 had awsome DJ @ 3am!)