DIY pulse oximeter (no special parts)

DIY pulse oximeter uses inexpensive universal parts and 3D printers without special parts. The pulse oximeter can detect the deterioration of COVID 19 symptoms. However, due to the shortage of medical supplies, we should bring them to the medical field. Therefore, we will consider yourself to create a pulse oximeter. In fact, there is a report that use a pulse oximeter module, such as the MAX30102. However, the pulse oximeter module is also shortage. Therefore, I have developed DIY pulse oximeters that can assemble inexpensive general parts without fear of shortage. detail The pulse oximeter requires high resolution ADC, while Arduino ADC is useless. The pulse oximeter measures transmitted light by scanning the LED current and measuring the time until the output of the photoelectric transistor reaches a particular voltage. As a result, it does not need ADC or special modules, and can be assembled with a inexpensive universal part, even if it is not available under special COVID19 requirements. I explain the operational principle in detail in the video. Be Foreign sheet: Click to enter Disclaimer: This article is translated by HackADay Authorized Circuit City, the original content of the circuit city, please indicate the source!

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