As the Brighton Fringe Festival draws to a close, BuildBrighton are hosting a drop-in "Noise Toys" workshop at Hectors House (strictly speaking, it's not Hectors House anymore, since it was recently taken over by a community arts/maker group, but everyone still knows it as that).
We've submitted a simplified version of our invisible instrument that has been made into kit form, so people can make one up and try it out in just a few hours. We've removed the LCD, LEDs and buttons and MIDI output, making it much more like the original prototype.
Build Bright On Invisible Instrument
A datasheet and instructional guide is available here on Scribd. Schematics (printable at 100% to make your own) are below:
Invisible Instrument Simpified