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

Posted in Arduino Hacks Tagged arduino, ham radio, morse code ← Cables And Winches Become An Awesome Simulator Raspberry Pi Weather Station In Progress → ...

An Arduino Nano fits and he uses a few additional parts to get shift registers, a 0-1V digital to analog converter, and an interface to an OLED display.

Arducon is an Arduino based ARDF transmitter controller specifically designed for for conducting amateur radio direction finding and is now available via Kickstarter.