W
winterwind
Hi,
I'm working on Pulse oximeter project using Nellcor DS-A100 sensor, I found its pinout on web. But I'm stuck at getting signal out from the sensor at pin 5. I was able to toggle RED and IR leds, but when I connect pin 5 (anode of the phototransistor) of the sensor to Vdd with a 10K pull-up resistor, I just get constant voltage around 0.47V at that pin (pin 5). So I think this way is wrong, yet I can't find any hints to have a good wiring. Anybode have any ideas for this problem pls give me a hint for getting Vout from the sensor. Thanks alot in advance.
Nice day,
I'm working on Pulse oximeter project using Nellcor DS-A100 sensor, I found its pinout on web. But I'm stuck at getting signal out from the sensor at pin 5. I was able to toggle RED and IR leds, but when I connect pin 5 (anode of the phototransistor) of the sensor to Vdd with a 10K pull-up resistor, I just get constant voltage around 0.47V at that pin (pin 5). So I think this way is wrong, yet I can't find any hints to have a good wiring. Anybode have any ideas for this problem pls give me a hint for getting Vout from the sensor. Thanks alot in advance.
Nice day,
