On Mon, Feb 8, 2010 at 4:16 PM, Chris McSweeny wrote: > for a given mean current any LED will appear brighter if that current is constant rather than PWM. So it sounds like all those people who are pulsing their LEDs for increased brightness at a given power input are doing so for no reason? > You simply can't make an LED brighter than by driving it with constant current at its maximum rated current. Interesting! I've heard differently, but of course cannot easily find out where, so I may have simply misunderstood. I suppose I'm going to have to do some experiments and find out what my own visual perception is. Too bad Russell is in China, I bet he'd have a field day on this topic...! -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist