Build a simple software defined radio receiver using a pi-pico and a few external components. (Only 2 ICs needed), Covers 0 to 30MHz, LW/MW/SW bands including Amateur bands. Supports AM/FM/SSB mode.Standalone design, no PC or soundcard needed. Runs on 3xAAA batteries, ideal for portable use.
Design Description/Circuit Diagram: https://101-things.readthedocs.io/en/latest/breadboard_radio.html
Code on Github: https://github.com/dawsonjon/PicoRX
3D printed enclosure: https://github.com/dawsonjon/PicoRX/tree/master/enclosure/breadboard_version
Pre-built .uf2 firmware image: https://github.com/dawsonjon/PicoRX/releases