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ATtiny85 Pulse Oximeter and Photoplethysmograph

Project in progress by Jeff Magee

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  • ATtiny85 Pulse Oximeter and Photoplethysmograph 3 months ago

    Works for me - it is different code on the ATTiny85.

  • ATtiny85 Pulse Oximeter and Photoplethysmograph over 1 year ago

    As I mention in the write up, if your dicrotic notch is particularly pronounced - as it is in young people - it can confuse the peak detector and you can get a pulse rate which is double what it should be. Make sure you are getting a clean waveform displayed - warm fingers help. Look at the filtered. IR waveform to see if you are getting a false peak. You could increase the strength of the second stage filter which should help.

  • ATtiny85 Pulse Oximeter and Photoplethysmograph almost 2 years ago

    Yes, should work with no problems.

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