Just bought one of these guys: http://canada.newark.com/jsp/level5/module.jsp?moduleId=en_US/69954.xml
Thought it would work just like a thermistor and merely needed a voltage divider and a formula based on the resistance to calculate the RH. Problem is I always read 1023 (5v) on the analog PIN. I've tried various resistor sizes and even w/o a resistor but can't get any sort of reading off of it.
My google-fu skills have left me empty handed as well. Can't find anyone who has interfaced one with an Arduino. I have learned a bit such as the fact that DC will cause it to die out after a long period of time, so people recommend either charging a capacitor and powering it off of that or just turning it on once or twice a day for a quick reading. I'm mostly doing this for the learning experience and am not too concerned if I burn out a $6 resistor, so I dont care if I get that fancy.
So if anyone has any pointers I'd greatly appreciate it!