Covid: How a £20 gadget could save lives - BBC News
3D printing technology and internet of things prototyping in family practice: building pulse oximeters during COVID-19 pandemic | 3D Printing in Medicine | Full Text
Pulse oximetry—from Apple Watch to equitable access | PATH
Arduino-Based Pulse Oximeter Setup | Arrow.com
Pulse oximeter with Internet data visualization
Build Your own Compact Arduino Based Pulse Oximeter Sensor Circuit
Smart Connected Pulse Oximeter | Renesas
Pulse and Regional Oximeters, Capnographs, Sensors | Nonin
ATtiny85 Pulse Oximeter and Photoplethysmograph - Hackster.io
Interfacing MAX30100 Pulse Oximeter Sensor with Arduino