[Pierre] recently bought his first car and decided to make his own RFID electric starter for it! An Arduino Nano controls two relays which in turn can turn the car on, start it, and turn it off.

Open demo.ino by Arduino IDE. Click Tools->Serial Ports, choose COM XX (Not COM1 and COM2). Click Tools->Boards, choose Arduino Leonardo. At last, click "upload" button on the right-top corner. Now, ...