Boards are in!
We got our custom circuit boards! You’ll probably want to change them around for your own purposes but here and here are the EAGLE CAD files. What we have is essentially an Arduino with a whole mess of servo headers and a couple of analog filters. The servo headers have unregulated battery voltage and the rest of the circuit is on a 5V regulator. The filters are envelope followers with a buffer stage to feed the A/D inputs on the AVR.
Here it is with parts soldered in:
Japanese readers: Just be glad I’m practicing my calligraphy, OK?