A perl script running on the iPhone will then send the command to the Arduino. When it receives the start command, the Arduino will ground the wire to the remote start and fire up the car.

Randy Sarafan, who also happens to be the Technology Editor over on Instructables, gutted a remote-controlled car and swapped the parts for an Arduino board.

First, some background: Arduino boards, like the popular Raspberry Pi computers, are single-board systems. You can upload code to them, just as you would any electronics project, but Arduino ...