Building a pulsoximeter project

Hello Everyone
I am a final year student puruing my development project -
'Pulsoximeter'. After all the research I am at a stage where I have to
design a pulsoximeter by using some sensors (Eg.TSL230R - Light to
Frequency converter). I would be really grateful to someone who could
suggest me a circuit design or even some resources which could be
helpful in the design. I need a start to carry on the project.
Thanks
Akshay Gupta
Manukau Institute of Technology

 

[Fred Bloggs]

I am a final year student puruing my development project -
'Pulsoximeter'. After all the research I am at a stage where I have to
design a pulsoximeter by using some sensors (Eg.TSL230R - Light to
Frequency converter). I would be really grateful to someone who could
suggest me a circuit design or even some resources which could be
helpful in the design. I need a start to carry on the project.

http://www.robots.ox.ac.uk/~neil/teaching/lectures/med_elec/

 

[Fred Bloggs]

I am a final year student puruing my development project -
'Pulsoximeter'. After all the research I am at a stage where I have to
design a pulsoximeter by using some sensors (Eg.TSL230R - Light to
Frequency converter). I would be really grateful to someone who could
suggest me a circuit design or even some resources which could be
helpful in the design. I need a start to carry on the project.

and http://www.circuitcellar.com/library/print/1204/Bachiochi173/index.htm

 

[Helmut Sennewald]

"Fred Bloggs" <nospam@nospam.com> schrieb im Newsbeitrag
news:43005C65.4040506@nospam.com...

I am a final year student puruing my development project -
'Pulsoximeter'. After all the research I am at a stage where I have to
design a pulsoximeter by using some sensors (Eg.TSL230R - Light to
Frequency converter). I would be really grateful to someone who could
suggest me a circuit design or even some resources which could be
helpful in the design. I need a start to carry on the project.


and
http://www.circuitcellar.com/library/print/1204/Bachiochi173/index.htm

Hello Fred,

this is great link about an oximeter and your other link regarding
medical electronic is very interesting as well.
Thanks!

I never thought that it could be so easy to make an oximeter,
but how can such an oximter be calibrated?

Best regards,
Helmut

 

[Marte Schwarz]

Hi Helmut et al,

http://www.circuitcellar.com/library/print/1204/Bachiochi173/index.htm
....
I never thought that it could be so easy to make an oximeter,

as I saw Fig 5 I know that I don't want to waste my time with this chip. It
is designed for some digital-... that can program some ľ but not do any
analog design. Do you imagine that you will be able to count valide values
out of such lazy data? You may calculate the oxigen satuartion up to few ppm
but the reality is what counts... I know about the difficulties to find LEDs
with low enough tolerances in wavelength, stability, ...

but how can such an oximter be calibrated?

That is a really great deal. A friend of mine did his PHD in this field
guess what his most favourite problem was? The cheapest solution will be to
compare the own device with a existing one. each on one finger. But guess,
the lower the values the more difficult to reach this.
I would do such a project only in close cooperation with a factory of
professional pulsoxies. And even then, not as one of my first projects...

regards

Marte