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Std edition ESP32 Audio Board WalkieTalkie

Profile:This is a very basic audio board that wires together an ESP32 dev module with an I2S amplifier and I2S microphone boards.

License: Public Domain

Published Time: 2022-03-04 19:51:28
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Description

I'm building a Walkie-Talkie based around the ESP32. This PCB wires together all the required modules and adds an independent supply to the microphone boards so you minimise noise when WiFi is being used.

 

You can use either an INMP-441 board or my microphone board (available from Tindie: https://www.tindie.com/products/21519/)

 

I made up this PCB as the wires to connect all the modules were getting quite untidy and I wanted to build in the power supply filtering.

design drawing
schematic diagram
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PCB
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ID Name Designator Footprint Quantity
1 ICS-43434 Breakout U4 ICS-43434 BREAKOUT BOARD 1
2 MAX98357 Adafruit Breakout U5 MAX98357A ADAFRUIT 1
3 10m L1 IND-TH_BD10.0-P5.00-D0.7 1
4 HDR-M-2.54_1x9 GPIO,PWR HDR-M-2.54_1X9 2
5 1u C4,C3 CAP-TH_L5.0-W2.5-P5.00-D1.0 2
6 MCP1700-3302E/TO U2 TO-92-3_L5.1-W4.1-P1.27-L 1
7 INMP441 U3 INMP441 1
8 1000u C1 CAP-D10.0×F5.0 1
9 TinyPICO NO TINYPICO 1

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