HF CW Beacon with ATMega328 and si5351

An amateur radio band beacon using the ATMega328 and si5351 for use as a signal source for testing receivers, antennas, or station operation. It provides a reliable off-air signal that can be attenuated by moving the beacon further away or by placing it in a screened box or location. Targets an Arduino Nano, Uno or bare ATMega328, and an si5351 breakout board. No display is necessary. You can add one, and controls, if you like.

Transmits a hard-coded message in morse code on any frequency supported by the si5351 (10kHz to 160MHz). Any number of frequencies in the HF and VHF range can be specified by adding them to an array. The beacon iterates over the array and transmits the message on each frequency in sequence.

Github:
https://github.com/prt459/Nano_Beacon

Blog:
https://vk3hn.wordpress.com/2021/10/0...