Simplest ultrasonic ANTISPY voice recording jammer based on ATTINY13 / ATTINY85/45/25 / ARDUINO with PAM8403 / TPA3116D2 module driving piezo ultrasonic transducers (and optionally AD8933 signal generator)

A simple NodeMCU based internet radio receiver.

A NEARLY_any audio player based on ESP32 & Arduino. 一个基于ESP32&Arduino的播放器，基本上可以播放任何音频。

Library kicad for pam8403 module

An FM radio receiver built using an ESP12E, interfaced with the RDA5807M module. Powered by a Li-Ion battery with a TP4056 charging module, amplified by a PAM8403, and output through a 10-watt speaker. Features station switching via a button.