PCB Board

[dalogue1]

I created a simple PCB board using KiCad that accommodates the ESP32 and the Adafruit ICS-43434 I2S Mic module.

The project can be created just by soldering 2 headers between the ESP32 and the PCB and a header from the PCB to the microphone board mounted on the bottom of the ESP32. The microphone board needs to be mounted on the bottom to possibly allow a small heat sink to be attached to the ESP32. If an exteral microphone is not used this could be just plugged into USB-C power.

There is a nice case design available on Printables.com that has an antenna mount, but it would need to be modified to accommodate the daughter board being on the bottom of the ESP32 https://www.printables.com/model/1543275-xiao-esp32-c6-zigbee-router-case-split-lid-sma-ext

The board is so small (about 18mmx20mm) that the smallest PCB board size on PCBWAY (100mmx100mm) would allow a grid of 20 boards using mouse-bites. You also get 5 boards.

I would get 100 boards for the minimal order. which is roughly $20.