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WorldFamousElectronics / PulseSensor_Amped_Arduino

PulseSensor Arduino code for BPM and Processing-Visualizer
MIT License
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pulse sensor cut off frequencies #85

Closed holly1551 closed 5 years ago

holly1551 commented 5 years ago

Hi, can someone please tell me the cut off frequencies of this sensor. I need it to obtain a respiration rate from the PPG signal. For this, I need the the frequencies to be atleast 0.2Hz and above.

biomurph commented 5 years ago

@holly1551 The Pulse Sensor has some high pass filtration on it's output, so you will not see a classic PPG signal with DC offset and low frequency drift of the signal. If you want to derive respiration, you can use HRV. https://github.com/WorldFamousElectronics/PulseSensor_Heart-Rate-Variabilty

holly1551 commented 5 years ago

@biomurph thanks for replying! Are you for certain that is doesn't contain frequencies from 0.2Hz and above? I cannot find how to derive respiration rate from HRV