It's a useless box with character, and a fine ear.
Video available here : http://vimeo.com/tchap/uselessbox
What you will need :
- An Arduino Nano
- A 9V battery holder
- A 9V battery
- A servo motor (5V to 9V, a GWS Naro+HP/BB is a perfect fit)
- 2 bi-stable switches (3 connectors)
- A bakelite test plate
- A 5mm LED (any color you fancy)
- 1 resistor (100 Ohm)
- Some short electric wires
- Pin headers (if you want to have pluggable connectors)
- Nails and screws
Tools you should have at hand :
- Soldering iron
- Some tin solder
- Heat shrink tubes
- A wire cutter
- A USB cable to program the Arduino