An Arduino Nano controls two relays which in turn can turn the car on, start it, and turn it off. Instead of adding a button for “push to start” he opted for a 13.56MHz RFID module.

Did you know that you can use Arduino to ... on a LED when the button is pressed and let it on until the button is pressed again */ int pinButton = 8; int LED = 2; int stateLED = LOW; int stateButton; ...