tetrafol 11/26/11 http://folchen.com http://monome.org http://machineproject.com license: gpl3, see http://www.gnu.org/licenses/gpl.html based on the arduino: http://arduino.cc based on the waveshield by adafruit industries: http://adafruit.com uses wavehc: http://code.google.com/p/wavehc/ waveshield: http://www.ladyada.net/make/waveshield/ the tetrafol circuit is basically an arduino and waveshield combined, with the unneeded bits removed and an accelerometer added. it's surface-mount to be small.