[GOT]

I would like to use a sound track to dim a string of Christmas lights (ie: the volume is inversely proportional to the light intensity, though I can deal with the reverse). I have a scary-terry set up and a dimmer, but the servo is too fast, so it is all or nothing. I want a slow pulse with some erratic stuff thrown in the mix. Any ideas? I would like to do this on the cheap and this is my first venture into the whole animatronics thing (scary-terry is as complex as I get right now).

 

[JonnyMac]

"On the cheap" and dimming AC can be... well, scary (and dangerous). There are simple circuits on the net that convert 120 VAC to DC that you can run through a power mosfet; that mosfet can be driven through an opto-coupler that takes your audio input. Be careful -- AC bites hard.

 

[Dr Morbius]

You could hook up a servo to a dial type wall light dimmer switch. You may need to use a servo controller and software to run it though, but if you already have that stuff, it's cheap way to dim lights while synced to a sound track.