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Photoplethysmography up

Anonymous Coward
Anonymous Coward

There's a reason proper Pulse-Oximeters cost a lot of money.

Define "a lot"? You can get them online for around £35 or so, and that's buying local - buying at source in China will probably be 1/5th of that, but you'd have to buy a container full of them.

I must look up how the oxygen part actually works. The finger heartbeat sensing I already did 35 years ago with a small bulb, an LDR and some electronics :).

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