Quantity   Component name
1 × Arduino Duemilenove Must have FTDI chip, so Uno will not work as substitute
3 × N-channel MOSFET TO-220 package Must be able to handle 2A @ 12V. Many parts are suitable.
1 × Strip of common-anode 12V RGB LEDs Can be flexible ribbon or individual modules.
1 × 12V power supply with 2.1mm barrel connector 2A will drive approximately 60 RGB LEDs
1 × Arduino Prototype shield optional - provides place to mount MOSFETs
1 × mounting plate and enclosure for LEDs Anything to fasten the LEDs down to