Raspberry Pi WSPR transmitter using NTP based frequency calibration
Makes a very simple WSPR beacon from your RasberryPi by connecting GPIO port to Antenna (and LPF), operates on LF, MF, HF and VHF bands from 0 to 250 MHz.
Compatible with the original Raspberry Pi, the Raspberry Pi 2/3, and the Pi Zero.
Reminds me of the Raspberry PiRate Radio project as well 😉
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