I loved the article! Even though I only understood about 1/3 of the technical details, I was honestly quite amazed at how “simple” was producing RF! The guy is using “sound” at 48kHz to produce the signals needed and then a Si5351A (signal generator for up to 200MHz or so controlled via I2C) to produce RF. I’m not sure, or don’t understand yet how the RF is being modulated, but conceptually is understandable! DSP is a field I want to dig deeper into, specifically DSP as it pertains RF.