Mostly to amuse the kids I've been playing around with trying to get a flickering candle effect from some yellow LEDs, and so far I'm not really happy with the results. I've tried both single LEDs and multiple LEDs to get a "moving flame" effect.
So, anybody had good luck doing this? Any ideas, approaches? I'm not asking about low-level PWM, I know how to do that. It's coming up with a good flow of realistic PWM numbers that's proving a bit difficult.