ProtoCentral MAX30003 Single-lead ECG Breakout Board

The original ProtoCentral MAX30003 single-lead ECG breakout. Built around the Maxim MAX30003 biopotential AFE with on-chip R-R detection, this v1 board has been superseded by the v2 board, which adds a 32 kHz crystal and a 3.3 V low-noise regulator. Existing v1 users — designs, code, and pinout remain compatible.

Features

• Maxim MAX30003 single-channel biopotential AFE
• Single-lead ECG monitoring (2 electrodes; no right-leg drive required)
• Built-in R-R and pace detection (Pan–Tompkins-style on-chip)
• 18-bit ADC with high DC-offset range — tolerant to motion artifacts
• Low power — as low as 85 µW at 1.1 V, ideal for battery-operated wearables
• On-board 1.8 V low-noise regulator
• 5 V-tolerant logic-level translator for direct Arduino interfacing

Important notice

This device is not a medical diagnostic instrument. It is intended for evaluation, education, and research only.

Safety

When connecting electrodes to the body, ensure the host computer is running on battery power, not mains. This avoids any direct electrical path between mains earth and the user.