ProFPGA
Banned
Hi All,
I am trying to make a pulse oximeter finger probe , i have 50% success as i can get a clear heart beat from a BW34 sensor .
The problem is when i turn the IR LED off and keep RED LED on , i dont get any pulsating data ?
I have read many app note , where the circuit drives both LED's at +3.3V , do i have to increase the voltage for RED LED ??? any clues ??
See my circuits attached
Regards
I am trying to make a pulse oximeter finger probe , i have 50% success as i can get a clear heart beat from a BW34 sensor .
The problem is when i turn the IR LED off and keep RED LED on , i dont get any pulsating data ?
I have read many app note , where the circuit drives both LED's at +3.3V , do i have to increase the voltage for RED LED ??? any clues ??
See my circuits attached
Regards