2 layers80.4 × 50 mm
Ecg cassette
AravinthPanch/araBeat
An interactive New Media Art system to translate the heartbeat of the visitor to an artistic form of sound and light in real-time.
10 parts3Apache-2.0
2 layers33 × 28.6 mm
Max30003 brk v3
Protocentral/protocentral_max30003_hardwareProtoCentral MAX30003 single-lead ECG breakout — hardware design files (CERN-OHL-P v2)
- Size
- 33 × 28.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 32
- Nets
- 32
- Pads
- 128
- Tracks, vias
- 167, 22
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 15 Oct 2026
- Updated
- 15 Oct 2026
Overview
Max30003 brk v3 is an open-source printed circuit board by Protocentral, from the Protocentral/protocentral_max30003_hardware repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 33 × 28.6 mm with 32 parts on 32 nets, routed with 167 tracks and 22 vias.
It is built around the AP2112K-1.8 and MAX30003CTI+. Its parts include 17 capacitors, 3 ICs, 2 resistors and 2 connectors. It belongs with the interfaces and adapters boards of this library.
Main components
2
AP2112K-1.8
SOT251.8V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
MAX30003CTI+
QFN-28-EP_5x50.51uA 0℃~+70℃ 1 1.1V~2V 18 1V 32.768kHz、12MHz 512Hz 512Hz 96.5dB Programmable gain、Fault detection、ESD protection SPI QFN-28-EP(5x5) Analog Front End (AFE) ROHSMaxim Integrated (Analog Devices)Analog Front End (AFE)
README
README.mdProtoCentral MAX30003 Single-lead ECG Breakout — Hardware
Open-source hardware design files for the ProtoCentral MAX30003 Single-lead ECG Breakout, built around the Analog Devices (Maxim) MAX30003, an ultra-low-power single-channel biopotential AFE with built-in R-to-R (heart-rate) detection.
The board takes a single ECG lead from a standard 3.5 mm electrode cable. It runs the MAX30003 from an on-board 1.8 V rail and translates the SPI and interrupt lines to your host's logic level, so it connects directly to 3.3 V or 5 V microcontrollers.
Links
| 🛒 Product page | https://protocentral.com/product/protocentral-max30003-single-lead-ecg-breakout-board-v2/ |
| 💻 Arduino library | https://github.com/Protocentral/protocentral_max30003 |
| 📄 IC datasheet (Analog Devices / Maxim) | https://www.analog.com/media/en/technical-documentation/data-sheets/max30003.pdf |
Specifications (v3)
- AFE: MAX30003 single-channel ECG front end with R-to-R detection
- Electrode input: 3.5 mm jack (Tip = ECGN, Ring = ECGP, Sleeve = VCM), 49.9 kΩ series resistors and an RC EMI filter on each input
- Interface: SPI (
CSB,SCLK,MOSI,MISO) plusINTB/INT2Binterrupts, level-translated to hostVCCby a TXB0108 - Clock: on-board SiT1533 32.768 kHz oscillator driving
FCLK - Supply: 3.3 V – 5 V on
VCC; on-board AP2112K-1.8 LDO for the AFE - Host header (J2, 8-pin): 1
INTB· 2INT2B· 3MISO· 4MOSI· 5SCLK· 6CSB· 7VCC· 8GND - Board: 33.0 × 28.6 mm, 2-layer
Revisions
| Revision | Design files | Notes |
|---|---|---|
| v3 (current) | hardware/ | KiCad 10 redesign; schematic PDF |
| v2.0 | hardware/previous-revisions/v2.0/ | Eagle (2018) |
| v1.1 | hardware/previous-revisions/v1.1/ | Eagle (2017) |
| v1.0 | hardware/previous-revisions/v1.0/ | Eagle (2017) |
The v2.0 files also remain in the original protocentral_max30003 repository, so existing links keep working.
Repository layout
| Folder | Contents |
|---|---|
hardware/ | v3 KiCad project (schematic + PCB layout) and the exported schematic PDF |
hardware/previous-revisions/ | Eagle design files for v1.0, v1.1 and v2.0, kept for reference |
Important notice
This device is intended for research, education, and evaluation use only. It is not a medical diagnostic instrument and is not FDA, CE, or FCC approved for consumer use.
License
The hardware design files in this repository are licensed under the CERN Open Hardware Licence Version 2 – Permissive (CERN-OHL-P v2). See LICENSE.
The accompanying Arduino library (in the separate protocentral_max30003 repository) is licensed under the MIT License.
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 1uF | Capacitor_SMD:C_0402_1005Metric | C6, C8, C10, C13 |
| 3 | 10uF | Capacitor_SMD:C_0805_2012Metric | C7, C11, C12 |
| 3 | 1u | Capacitor_SMD:C_0402_1005Metric | C14, C16, C18 |
| 2 | 100n | Capacitor_SMD:C_0402_1005Metric | C15, C17 |
| 2 | 10pF | Capacitor_SMD:C_0402_1005Metric | C1, C2 |
| 2 | 49.9k | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad_TopBottom | H1, H2 |
| 1 | 1000pF | Capacitor_SMD:C_0402_1005Metric | C3 |
| 1 | 10uF | Capacitor_SMD:C_0402_1005Metric | C4 |
| 1 | 1nF | Capacitor_SMD:C_0402_1005Metric | C5 |
| 1 | AP2112K-1.8 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | AudioJack3 | Connector_Audio:Jack_3.5mm_CUI_SJ-3523-SMT_Horizontal | J1 |
| 1 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J2 |
| 1 | ECGN | TestPoint:TestPoint_Pad_1.0x1.0mm | TP3 |
| 1 | ECGP | TestPoint:TestPoint_Pad_1.0x1.0mm | TP2 |
| 1 | LOGO | LOGO | G*** |
| 1 | MAX30003CTI+ | Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP2.7x2.7mm | U1 |
| 1 | SIT1533 | kicad_protocentral_footprints:SiT1533_SIT | U$1 |
| 1 | TXB0108PWR | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U3 |
| 1 | VCM | TestPoint:TestPoint_Pad_1.0x1.0mm | TP1 |
The 31 most common of 32 parts.
Questions
How big is the Max30003 brk v3 PCB?
It measures 33 × 28.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Max30003 brk v3 use?
32 parts, built around the AP2112K-1.8 and MAX30003CTI+. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Max30003 brk v3 KiCad files?
From the Protocentral/protocentral_max30003_hardware repository on GitHub, at the commit this page was made from: the board is hardware/max30003_brk_v3.kicad_pcb and its schematic hardware/max30003_brk_v3.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Max30003 brk v3 design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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