3D interface demo playing 3D tic tac toe (against myself).
Ingredients: cardboard, aluminum, wires, 6 resistors, Arduino, Processing.
Make one for yourself: http://www.instructables.com/id/DIY-3D-Controller/
Demoing a DIY force sensitive resistor (FSR) using an Arduino and a voltage divider circuit. Pressure on the FSR controls the brightness of the LED.
Arduino code: http://vimeo.com/groups/physicalcomputing/file:276
2 minute improvisation on a BEAM-inspired minimalist 9V noise synth. Featuring: a 4093 (Quad NAND), 3 capacitors, and 4 homebrew force sensitive resistors. All in a compact, hot-glued, entomoid form!