SpO2 (Blood Saturation Level) using TCRT500 arduino codes

Using Arduino Sensors
1

Hi!
I'm currently working on pulse oximeter using tcrt5000 ir sensor. I already figured the codes for pulse rate acquisition and now i'm kind of stuck with the SpO2 or Blood saturation level codings cause I really cant figure it out. Hoping for your good advices.
Attach here with is a file of a project I'm following but since I'm a newbie I really need guidance.

287ijirse.pdf (471 KB)

2

A link to the specification of the device that you are using would be a help.

3

If this is the device you have, it appears to be a general purpose reflective optical sensor. How would you interpret the output to give you the SpO2 or Blood saturation level results you are looking for ?

4

UKHeliBob:
A link to the specification of the device that you are using would be a help.

https://www.vishay.com/docs/83760/tcrt5000.pdf I'm using this device

5

6v6gt:
If this is the device you have, it appears to be a general purpose reflective optical sensor. How would you interpret the output to give you the SpO2 or Blood saturation level results you are looking for ?

I added an attatchment above which is the project I'm following.

6

You could hardly have picked a poorer example to follow, but the authors have presented a few of the SpO2 measurement details correctly.

Their method (which is not original) is to measure the ratio of blood tissue absorbance at red and IR wavelengths and then to convert that ratio to SpO2 according to a formula. Google will provide much more information, if you take the trouble. For example.

From the abstract of the linked paper:

The red light should have the 600-750nm wavelength light band and infrared light should have 850-1000nm wavelength light band.

7

jremington:
You could hardly have picked a poorer example to follow, but the authors have presented a few of the SpO2 measurement details correctly.

Their method (which is not original) is to measure the ratio of blood tissue absorbance at red and IR wavelengths and then to convert that ratio to SpO2 according to a formula. Google will provide much more information, if you take the trouble. For example.

From the abstract of the linked paper:

a friend of mine just refered me on that example says it uses the same circuit and device that my project use. how can I get absorbance of red and ir ? what is the arduino codes for those?

8

Your friend is not giving you good advice, and you are not doing your reading.

Come back when you can post an intelligent question.