Hello, manager.
I am testing a Red and IR PPG sensor on my wrist using the AFE4900 and SFH7072.
However, there is a problem that does not well sensing if i again measure the signal that sensing well.
I am testing while increasing the LED current and adding a DAC.
When I think I have found the optimal parameters and measure again, the signal is difficult to pick up.
And when the LED current is increased, the DC is also high and the DAC is also incrased. It seems to sensing well when measured at this time, but it becomes very sensitive to movement.
It reacts so sensitively that it is difficult to use, and this also changes with each measurement.
How can I solve it?
Please check and reply.
Thank you.
Regards.
