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Main Board

jackshisd·EoC-Lab·Hardware/Main Board/Main Board.kicad_pcb

Main Board layout, top view — open source ESP32 board by jackshisd

About the Main Board

Main Board is an open source ESP32 PCB design by jackshisd, published on GitHub. It is a 4-layer board measuring 71 × 57.5 mm, with 74 components from 40 distinct parts.

Its main chip is the ESP32-S3-WROOM-2, from the ESP32 family. Other key parts include the TPS63060, TP4056-42-ESOP8, TLV75528PDBV and AP2112K-1.2. By type, the board carries 25 resistors, 21 capacitors, 6 connectors, 5 ICs, 4 diodes and 1 transistor.

It belongs with the audio, iot & wireless and wearables designs in this gallery.

From the project

ESP32-based infant wearable for audio and video data acquisition with SD storage, BLE-triggered recording, and USB mass storage support.

WARNING: This project writes audio/video files to the SD card. Back up your data before testing.

Records: - Audio: WAV via I2S mic (ICS-43434), mic0001.wav, mic0002.wav, ... - Contact audio: WAV via ES8388 contact mic board, CT0001.WAV, CT0002.WAV, ... - Video: MJPEG via OV2640, VID0001.MJP, VID0002.MJP, ...

Core features: - SDMMC FAT mount/unmount - USB MSC to expose the SD card when idle - SSD1306 I2C OLED status - Button UI - BLE scan trigger (advertisements) with timestamped filenames - Simultaneous standard mic + contact mic recording to separate WAV files - Boot-time ES8388 codec…

Main components on the Main Board

ESP32-S3-WROOM-2TPS63060TP4056-42-ESOP8TLV75528PDBVAP2112K-1.2

Main Board bill of materials (BOM)

74 components, 40 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-WROOM-2
U1
1
TPS63060
U2
1
TP4056-42-ESOP8
U3
1
TLV75528PDBV
U4
1
AP2112K-1.2
U6
1
AO3401A
Q1
1
MICRO_SD_CARD_DET1
Micro_SD_Card_Det1
J1
1
CONN_01X09_SOCKET
Conn_01x09_Socket
J3
1
MIC 1 Connector
J4
1
MIC 2 Connector
J5
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J6
1
OLED
J7
2
TestPoint
3V3, GND1
1
FerriteBead
600Ω@100MHz1
3
SW_Push
BOOT1, RESET1, USER_INPUT1
1
Battery_Cell
BT1
1
OV2640
CAM1
1
Fuse
F1
1
SW_SPST
SW1
1
TestPoint
TP3
Show 20 more
QtyPartRefs
1
LED
D1
2
LED
D2, D3
1
SS14
D5
1
1UH
1uH
L1
3
0.1UF
0.1uF
C1, C3, C8
3
10UF
10uF
C2, C7, C10
3
10UF
10uF
C4, C5, C6
1
10PF
10pF
C9
3
22UF
22uF
C11, C12, C13
4
0.1UF
0.1uF
C14, C15, C16, C17
4
1UF
1uF
C18, C19, C20, C21
4
10K
10k
R1, R12, R13, R14
6
47K
47k
R2, R3, R4, R5, R6, R7
4
22
R9, R10, R23, R28
3
4.7K
R11, R17, R26
2
0
R15, R27
1
560K
560k
R16
2
100K
100k
R18, R24
1
1M
R19
2
5.1K
5.1k
R21, R22

Main Board design files

The KiCad project lives in the jackshisd/EoC-Lab repository on GitHub; these links point at the commit this page was built from.

Main Board: common questions

What microcontroller does the Main Board use?

The Main Board is built around the ESP32-S3-WROOM-2, from the ESP32 family.

How big is the Main Board?

The Main Board measures 71 × 57.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Main Board?

74 components, from 40 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Main Board design files?

From the jackshisd/EoC-Lab repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Main Board design in my own project?

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

Can I test firmware for the Main Board 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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