Author Topic: Pulse Oximeter using Arduino Uno, Raspberry Pi and Xprotolab  (Read 38749 times)

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Offline elektronchika

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Re: Pulse Oximeter using Arduino Uno, Raspberry Pi and Xprotolab
« Reply #25 on: February 04, 2016, 07:39:46 am »
Interesting threat.

I also try to make a HR and SPO2 monitoring. I have all the hardware and I can plot the graphs of the IR and RED leds. Everything is good so far but HOW DO I DO the calculations inside a low-power microcontroller. In TI's SLAA274B there is a band-pass filter, zero-crossings (I thing the block diagram is wrong - zero crossing should be done after the BP filtering) and RMS calculations. All of these are too hard to make in a MSP430. That's why in all these App notes they send the data to a PC and the PC makes the calculations.

So, I'm stuck at this points. Any suggestions from you guys?

Cheers!
 

Online coppice

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Re: Pulse Oximeter using Arduino Uno, Raspberry Pi and Xprotolab
« Reply #26 on: February 04, 2016, 08:59:11 am »
Interesting threat.

I also try to make a HR and SPO2 monitoring. I have all the hardware and I can plot the graphs of the IR and RED leds. Everything is good so far but HOW DO I DO the calculations inside a low-power microcontroller. In TI's SLAA274B there is a band-pass filter, zero-crossings (I thing the block diagram is wrong - zero crossing should be done after the BP filtering) and RMS calculations. All of these are too hard to make in a MSP430. That's why in all these App notes they send the data to a PC and the PC makes the calculations.

So, I'm stuck at this points. Any suggestions from you guys?

Cheers!
All the calculations in that app. note are performed on the MSP430. Only the final results are sent to the PC for display.
 

Offline HAL-42b

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Re: Pulse Oximeter using Arduino Uno, Raspberry Pi and Xprotolab
« Reply #27 on: February 04, 2016, 09:58:48 am »
Turns out an Open Source Pulse Oxymeter is A LOT more important than any of us realized.



From around 20:00 but obviously watch the whole thing to get the context.
 

Offline jpereira.ca

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Re: Pulse Oximeter using Arduino Uno, Raspberry Pi and Xprotolab
« Reply #28 on: October 20, 2020, 05:30:18 am »
In the end, was anyone able to connect a Nellcor Pulse Oximeter to an Arduino, and get the calibration data from the OTP EPROM on DB-9 pins 4 and 8?

Also, what OP-AMP did you end up using to convert the current range to an Arduino-readable voltage range?

Many thanks in advance!
 


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