I would like to create a circuit (low voltage; dc) to keep a small chamber free of humidity, using a pc-cooling-fan for that and two humidity sensors: one in the chamber and one outside the room. The idea is to turn the fan on, only if the humidity inside the chamber is higher than outside.
I thought I'd figured something simple out with two resistive humidity sensors and a wheatstone bridge, but then I read that you'd polarise the sensor if you use DC instead of AC voltage, reducing the life of the sensors..... I wouldn't know where to start with a capcitive sensor.
Though I suspect it should be relatively simple to build the circuit: unfortunately I'm a noob, therefore I as your help!
Thanks a lot in advance,
Maarten
I thought I'd figured something simple out with two resistive humidity sensors and a wheatstone bridge, but then I read that you'd polarise the sensor if you use DC instead of AC voltage, reducing the life of the sensors..... I wouldn't know where to start with a capcitive sensor.
Though I suspect it should be relatively simple to build the circuit: unfortunately I'm a noob, therefore I as your help!
Thanks a lot in advance,
Maarten
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