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BIOCHEST-ECG-EMG

8aChristian·BIOCHEST-ECG-EMG

BIOCHEST-ECG-EMG PCB layout, top view — open source ESP32 board by 8aChristian

About the BIOCHEST-ECG-EMG PCB

BIOCHEST-ECG-EMG is an open source ESP32 PCB design by 8aChristian, published on GitHub. It is a 4-layer board measuring 88 × 58 mm, with 29 components from 27 distinct parts.

Its main chip is the ESP32-S3-MINI-1-N8, from the ESP32 family. Other key parts include the ADS1293CZXER, ISO7741UDWR, TPS7A2033PDBVR, AP2112K-3.3TRG1 and BQ24075RGTR. By type, the board carries 8 ICs, 7 capacitors, 6 connectors, 5 diodes, 2 switches and 1 battery holder.

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

From the project

BIOCHEST-ECG/EMG is an ultra-compact, medical-grade, 4-layer wearable biosignal acquisition platform engineered for continuous, high-fidelity Electrocardiography (ECG) and Surface Electromyography (sEMG) telemetry. Designed strictly around IEC 60601-1 (2x MOPP) and IPC-2221 Class

BIOCHEST-ECG/EMG is an ultra-compact, medical-grade, 4-layer wearable biosignal acquisition platform engineered for continuous, high-fidelity Electrocardiography (ECG) and Surface Electromyography (sEMG) telemetry. Designed strictly around IEC 60601-1 (2x MOPP) and IPC-2221 Class 2 medical standards, the device combines a 24-bit bio-potential analog front-end (AFE) with galvanic barrier isolation and an ESP32-S3 dual-core microcontroller featuring native Wi-Fi, BLE 5.0, and USB-C power-path management.

Main components on the BIOCHEST-ECG-EMG

ADS1293CZXERISO7741UDWRESP32-S3-MINI-1-N8TPS7A2033PDBVRAP2112K-3.3TRG1BQ24075RGTRB0503S-1WR3MAX17048G+T10

BIOCHEST-ECG-EMG bill of materials (BOM)

29 components, 27 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ADS1293CZXER
ADS1293
Texas Instruments
U1
1
ISO7741UDWR
ISO7741U
Texas Instruments
U2
1
ESP32-S3-MINI-1-N8
ESP32-S3-MINI-1
Espressif Systems
U3
1
TPS7A2033PDBVR
TPS7A2033
Texas Instruments
U7
1
AP2112K-3.3TRG1
AP2112K-3.3
Diodes Incorporated
U8
1
BQ24075RGTR
BQ24075
Texas Instruments
U9
1
B0503S-1WR3
Mornsun
U10
1
MAX17048G+T10
MAX17048
Analog Devices / Maxim
U11
1
ECG-SNAP-10MM
ECG+
Generic / Keystone
J1
1
ECG-SNAP-10MM
ECG-
Generic / Keystone
J2
1
ECG-SNAP-10MM
RLD
Generic / Keystone
J3
1
ECG-SNAP-10MM
EMG+
Generic / Keystone
J4
1
ECG-SNAP-10MM
EMG-
Generic / Keystone
J5
1
TYPE-C-31-M-12
USB_C
Korean Hroparts / GCT
J6
1
S2B-PH-K-S
VBAT_JST
JST
BT1
1
KMR221GLFS
RESET
C&K / Panasonic
SW1
1
KMR221GLFS
BOOT
C&K / Panasonic
SW2
3
TPD2E001DRLR
TPD2E001
Texas Instruments
D1, D2, D3
1
19-217/GHC-YR1S2/3T
STATUS_GRN
Everlight / Lite-On
D4
1
19-217/R6C-AL1M2VY/3T
ALERT_RED
Everlight / Lite-On
D5
Show 7 more
QtyPartRefs
1
CL10B104KB8NNNC
100nF_AVDD
Samsung / Murata
C1
1
CL10B104KB8NNNC
100nF_DVDD
Samsung / Murata
C2
1
CL10B104KB8NNNC
100nF_VDD
Samsung / Murata
C3
1
CL10B104KB8NNNC
100nF_ISO2
Samsung / Murata
C4
1
CL10A106KO8NNNC
10uF_3V3
Samsung / Murata
C5
1
CL10A475KO8NNNC
4.7uF_3V3
Samsung / Murata
C6
1
CL10A106KO8NNNC
10uF_VBAT
Samsung / Murata
C7

BIOCHEST-ECG-EMG design files

The KiCad project lives in the 8aChristian/BIOCHEST-ECG-EMG repository on GitHub; these links point at the commit this page was built from.

BIOCHEST-ECG-EMG: common questions

What microcontroller does the BIOCHEST-ECG-EMG use?

The BIOCHEST-ECG-EMG is built around the ESP32-S3-MINI-1-N8, from the ESP32 family.

How big is the BIOCHEST-ECG-EMG PCB?

The BIOCHEST-ECG-EMG measures 88 × 58 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the BIOCHEST-ECG-EMG?

29 components, from 27 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 BIOCHEST-ECG-EMG design files?

From the 8aChristian/BIOCHEST-ECG-EMG 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 BIOCHEST-ECG-EMG design in my own project?

The repository has no license, so all rights stay with 8aChristian. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the BIOCHEST-ECG-EMG 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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