ASAIR HDS10 sensor (potentiometer) with Op-Amp.
Sensor resistance depends on humidity:
20kOhm > - 75%RH
100kOhm > - 93%RH
200kOhm < - 100%RH
(Adjust leftmost potentiometer to simulate sensor outputs)
2 work modes with switch (jumper):
1) comparator trigger, set middle potentiometer connected to inverted input through switch to adjust trigger value
2) signal amplifier for ADC processing (you can tweak feedback potentiometer to control amplifier gain)
