Equipment:
- Old remote controled car, Cost: $20
- IPod Touch, Cost $300
- Arduino (I'm using Duemilanove), Cost ~$120
- Some Prototype board
- Some old single strand Cat5e/6 Network cable
- Transistors (You could use a Motor driver, but i was cheap)
- Arduino software
- Proccessing tool
- TouchOSC ($4.99USD) or Mrmr (FREE) found on iTunes
On my IPod Touch i run ether MrMr or TouchOSC, these programs use an old standard for sending data from devices, which was used to control lights.