Just been looking at twinkler guitar (because deep rooted in every musician is LED bling just waiting to be mounted on his guitar)...

Originally discussed here...

http://projectguitar.ibforums.com/in...howtopic=41134

with a youtube video of the end end goal here...



Here's the chip they use....
http://www.national.com/ds/LM/LM3915.pdf

Now I'm fairly new to PICs, & even I reckon I could fairly quickly kludge some LEDs that light depending on the analogue input level, but I guess what separates my likely awful code from the likes of the h/w chip is the algorithm for fading the LEDs out smoothly (and the 3dB bit).

Has anyone done such a thing with LEDs? (not LCD bargraphs...nice bright, twinkly LEDS)...or would anyone have a good starting point ?

Ta,
Hank.