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.
| 🛒 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 |
- 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
| 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.
| 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 |
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.
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.