Apart from understanding the Arduino's code language ... to this main processor, the Nano also has another chip on board, the FTDI FT232RL, which handles USB communication as the ATmega328 ...

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.

The circuit is extremely simple, comprising the sensor, an Arduino Nano, and an OLED display. This device is handy because its voltage output has a known relationship to the gauss level the sensor ...