oximetry

[Taylor]

Hello everyone
since this coronavirus pandemic hit the world we have been trying to find solutions for the sick by manufacturing medical equipment to detect the lack of oxygen in the blood ... so I try to make equipment using a microcontroller to measure oxygen saturation in the blood
all I need is the sensor clip that we put on the finger
Thank you

[Garth]

What do they detect? Transmission of a particular wavelength of light compared to another? I'm sure there's no need to re-invent the wheel though. I think these have even been used in aircraft, for the pilots to make sure they're getting enough oxygen, especially in non-pressurized aircraft where they need oxygen above a particular altitude (maybe above 8,000 feet?) to make sure their mental performance is not impaired.