He put it all together on proto-board, although soldering the FM radio module was a bit tricky. The Arduino code is quite simple, and available for download (zip file).

Arduino enthusiasts looking for a new project to keep them busy over the weekend may be interested in a new Arduino FM Radio Project, which uses an ATmega328-based board to communicate with a ...

With an Arduino Nano as the brains and controller for an Si4703 breakout board, he builds a completely functional and portable FM radio.

The simple code generates digital tones with the Arduino and broadcasts on Left channel (L) to prove connectivity and transmission frequency. The hardware shown below is able to take in stereo audio ...

That is capable of enabling your Arduino project to communicate with people and things using amateur radio bands.