June 19, 2009
about a month ago
Is this 600mA output max or input max?
about 2 years ago
This will actually work perfect for a SpO2 meter. The best IR wavelength to use is 950 nm, you would shine the IR through the finger/wrist and record the result. Then you would shine a bright red LED through the same area and compute the ratio between the two results. You do this since oxyhemoglobin has no resistance to IR but does have a computable resistance to red light. More explained here: http://www.equipmentexplained.com/physics/respi_measurements/oxygen/oximeter/pulse_oximeter.html
Random equipment to experiment with.
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