Giulio PonsI've updated the details of the project, I've added how I've modified the KY-0039 heartbeat sensor to add another led and performs a double read, using both red and infrared leds.
Details updated
A project log for Oximeter do it yourself
In this period of isolation, I'm trying to build an oximeter with parts already in house. An oximeter is made by two leds and a photodiode.
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