snaggy:
Thanks to you all, in particular the TLC5940 seems a good solution, I hadn't realized I could use more than one output on the same LED. @MarkT, could you clarify this part a bit? would I just need to wire the 3 outputs together and set the same pwm on them? Or maybe I need some capacitors to smothen things up (random guess :P)Thanks
Well I am not sure - its possible they have separate counters for each output (though this seems wasteful), so you would need to
double check that. Since the currents add even that might not matter. Yes, set the PWM values the same for commoned
pins would be sensible.