For the transmitter, he turned an Arduino Pro Micro into a USB sound card which he could plug into his laptop. That outputs both the audio signal and a 40 kHz carrier signal, implemented using the ...

Build Your Own Digital FM Radio Transmitter with Arduino. April 10, 2017 by T.K ... Both of the freestanding modules (NS73MFM transmitter, Arduino UNO) can be mounted to a breadboard and ... (by ...

But this time the receiving side was swapped out, as [GreatScott] built a basic circuit around a TA7642 AM amplifier/demodulator IC, with only six passive components and a hand-wound coil.