Let’s make a custom stereo amp breakout board and use it to build a Bluetooth speaker using an ESP32 and A2DP.

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[1:07] Custom stereo board schematic [4:00] PCB Layout And Manufacture [7:10] Testing [8:34] A2DP Software Stack

Up until now, I’ve been using the MAX98537 breakout board from Adafruit for most of my audio projects (see here https://youtu.be/At8PDQ3g7FQ for a good intro to I2S and the board). I decided to create my own breakout board to support stereo output.

To test it out I’ve created a very simple Bluetooth speaker using A2DP. This is based on the excellent work done by pschatzmann here: https://github.com/pschatzmann/ESP32-A2DP

Really very straightforward to do and a fun project!

You can buy a standard mono amplifier board here - https://amzn.to/3cg88Z5 And I’m using the TinyPico board from Unexpected Maker - https://amzn.to/3vVoONp

Soon as I make the updates to my design I’ll publish them on PCBWay.


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