DIY Pulse Oximeter – Open Electronics

By Bianchi Gabriele on July 30, 2022

The oximeter is a software that permits you to calculate the proportion of oxygen saturation within the blood primarily based on the quantity of sunshine absorbed. It consists of a photodiode and two LEDs: a pink LED and an infrared LED. To make the measurements, the fingertip is positioned between the photodiode and the LEDs as proven within the following picture. Oxygenated blood absorbs extra infrared mild whereas deoxygenated blood absorbs extra pink mild. The processor calculates the ratio between the pink mild obtained by the photodiode and the infrared mild over totally different time intervals.



On this challenge we see the best way to make this instrument ranging from its primary parts, that’s 2 LEDs and the photodetector. We related the parts as proven within the wiring diagram beneath. We used an Arduino Professional Mini as a microcontroller and an OLED show to view the info. A 9 Volt battery will energy the circuit.

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About Bianchi Gabriele