From the Forums: Installing a Servo in a Bucky Skull #electronichalloween
Halloween is over but it’s never too early to get started on next year’s projects! Here’s a tutorial from forum member rogerkaplan on how to make your scary Halloween skull decorations even more frightening.
There are a few circuits floating around the net for changing sound (either microphone or recording) into servo motion, usually to control an animatronic (I’m doing a talking skull). For the most part it operates on the amplitude of the sound.
Since I’m a programmer rather than a hardware guy, I decided to do most of the work in software using an Arduino Nano which I had lying around. I figure that I can also improve the motion with some software fiddling (envelope following, possibly basic phoneme recognition)