Finally, Morse code is a very simple way to do covert communications. If you know Morse code, ... [M0TGN] wanted a device to generate practice code, so he built it around an Arduino.

[jmilldrum] really gets a lot of use out of his Si5351A breakout board. He’s a ham [NT7S], and the Si5351A can generate multiple square waves ranging from 8 kHz to 160 MHz, so it only stands … ...

Makers, hobbyists and developers looking for a low powered Arduino compatible development board with built-in RF capable of running AVR projects for years using just a single AA battery.. Maybe ...