Audio Alert using a DFPlayer module

Audio Alert using a DFPlayer module

For a PCB SMT version see https://www.thingiverse.com/thing:3102114 or https://www.instructables.com/id/Audio-Alert/

https://youtu.be/I41c7qiyuZw

This Audio Alert box is placed between an audio source and an audio consumer such as an FM transmitter or amplifier. When the alert box wirelessly receives an encoded message, it breaks into the audio stream from the source and plays an mp3 sound clip. I designed the Audio Alert box for a project I recent