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Esp32-stereo audio recorder

Harshad-vali·esp32-stereo-audio-recorder

Esp32-stereo audio recorder PCB layout, top view — open source ESP32 board by Harshad-vali

About the Esp32-stereo audio recorder PCB

Esp32-stereo audio recorder is an open source ESP32 PCB design by Harshad-vali, published on GitHub. It is a 2-layer board measuring 62.5 × 44 mm, with 45 components from 28 distinct parts.

Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the TPS54331D and DS3232M. By type, the board carries 22 capacitors, 12 resistors, 3 ICs, 2 connectors, 2 microphones and 1 battery holder.

It belongs with the audio designs in this gallery.

From the project

ESP32-WROOM-32 based stereo audio recorder with dual I2S MEMS microphones, RTC timestamping, and microSD logging. KiCad hardware design + manufacturing files.

Hardware design files for an ESP32-based audio recording device, including the KiCad project, PCB layout, schematic, manufacturing Gerbers, bill of materials, and design renders.

- Revision: v1.0 - Date: 10-03-2026 - Designed by: Harshad Vali - Organization: Suretrust

This board is an ESP32-based audio module designed around an ESP32-WROOM-32 controller. The schematic integrates stereo digital microphone inputs, microSD storage, a real-time clock, and a regulated 3.3 V power system.

Esp32-stereo audio recorder, from the project README
From the project README

Main components on the Esp32-stereo audio recorder

TPS54331DESP32-WROOM-32DS3232M

Esp32-stereo audio recorder bill of materials (BOM)

45 components, 28 distinct parts.

QtyPartRefs
1
TPS54331D
U1
1
ESP32-WROOM-32
U2
1
DS3232M
U5
1
Barrel_Jack_Switch
J1
1
ST-TF-003A
P1
1
Battery_Cell
BT1
2
ICS-43434
MK1, MK2
1
SW_Push
SW1
1
B340
D1
1
6.8uH
L1
10
0.1uF
C1, C2, C3, C6, C7, C8, C16, C18 +2
2
4.7uF
C4, C5
2
47uF
C9, C10
1
1000pF
C11
1
47pF
C12
4
10uF
C13, C17, C19, C20
1
2.2uf
C14
1
100nf
C15
2
100Kohms
R1, R11
1
332Kohms
R2
Show 8 more
QtyPartRefs
1
68.1Kohms
R3
1
0ohm
R4
1
10.2Kohm
R5
1
3.24Kohm
R6
1
29.4Kohm
R7
2
10K
R8, R12
1
4.7Kohm
R9
1
4.7Kohms
R10

Esp32-stereo audio recorder design files

The KiCad project lives in the Harshad-vali/esp32-stereo-audio-recorder repository on GitHub; these links point at the commit this page was built from.

Esp32-stereo audio recorder: common questions

What microcontroller does the Esp32-stereo audio recorder use?

The Esp32-stereo audio recorder is built around the ESP32-WROOM-32, from the ESP32 family.

How big is the Esp32-stereo audio recorder PCB?

The Esp32-stereo audio recorder measures 62.5 × 44 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Esp32-stereo audio recorder?

45 components, from 28 distinct parts. The full bill of materials is listed on this page.

Where can I download the Esp32-stereo audio recorder design files?

From the Harshad-vali/esp32-stereo-audio-recorder repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Esp32-stereo audio recorder design in my own project?

The repository has no license, so all rights stay with Harshad-vali. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Esp32-stereo audio recorder without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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