ProtoCentral AFE4490 Pulse Oximeter Breakout Board Kit
₹7,495
Synthetos gShield (grblShield) V5
₹9,193
ProtoCentral AFE4490 Pulse Oximeter Shield for Arduino – v2
Open-source Arduino shield for pulse oximetry based on the TI AFE4490 single-chip analog front end. Plugs onto Arduino Uno R3/R4 to read SpO2 and heart rate from a Nellcor-compatible finger probe (included). Compatible with the ProtoCentral OpenView app.
In stock
Helpful Documentation
The ProtoCentral AFE4490 Pulse Oximeter Shield brings the same TI AFE4490 single-chip pulse-oximetry analog front end as our breakout — in an Arduino-shield form factor that plugs straight onto an Arduino Uno R3 / R4 with no jumper wires. Read SpO2 and heart rate from the included Nellcor-compatible finger probe in minutes.
Pulse oximetry is an indirect, non-invasive method of measuring oxygen saturation. The probe shines red and infrared light through a fingertip and measures the light absorbed by haemoglobin — the ratio between the two wavelengths gives SpO2, and the same waveform’s pulsatile component gives heart rate without any ECG electrodes. For background reading, see How Equipment Works — Pulse Oximetry.
The shield is fully open-source — schematic, layout, and Arduino library all live in our GitHub repository (library) and the shield hardware repo. It’s compatible with the ProtoCentral OpenView unified visualization app for live waveform plotting on Windows, Linux, iOS, and Android.
Important: This is a development and prototyping board for SpO2 research and education only. It is not a medical device and must not be used for clinical diagnosis or patient monitoring.

Features
- TI AFE4490 single-chip pulse-oximetry analog front end
- Arduino Uno R3 / R4 shield form factor — plug-and-play, no jumper wires
- Standard Nellcor-compatible DB9 connector for the included finger probe
- Computes SpO2 and heart rate using the provided Arduino library
- Streams live PPG waveform to OpenView for real-time visualisation
- Stackable header set included so other shields can stack on top
- Fully open-source hardware and software
Board Dimensions
Arduino Uno shield footprint — 68.6 × 53.3 mm (2.7 × 2.1″)
Documents
GitHub Discussions
Ask questions, share projects, and get help from the ProtoCentral community.
GitHub Discussions →Contribute
Hardware and software are open source. Pull requests and improvements are welcome.
Contribute →