https://projecthub.arduino.cc/CesarSound/10khz-to-225mhz-vforf-generator-with-si5351-version-2-acdc25
10kHz to 225MHz VFO/RF Generator with Si5351 - Version 2 | Arduino Project Hub
For use in DIY homebrew radio equipment such superheterodyne single/double conversion receiver, SDR, HAM QRP transceivers or RF generator.