Create a 96 MHZ Electromagnic Wave from Fast PWM can be listen on the FM RADIO at about 96MHZ I'm not the author of the script source is : https://withinspecifications.30ohm.com/2014/03/09/Fast-PWM-EMI/
I publish on GitHub to save it and share it.
Have fun.
Tags : Arduino FM RADIO / Transmitter FM Arduino / Arduino PiFM