Automated humidity control?
I just started an orchidarium in an 18 gallon tall aquarium. I'm trying to rig up a system so that I can go away for a week or two and have timers and controls handle everything while I'm gone.
The light is easy enough to do on a timer, but I'd really like to find a humidity controller that will turn on the misting system when the humidity drops below 50%. Does anyone know where I can find such a thing for a reasonable price?
Alternately, has anyone tried a PIC controller who would be willing to share plans or ideas? I'm a fair hand at electronic tinkering and can get a humidity sensor chip locally (ah, the joys of university stockrooms). Ideally I'd like a system that would come on at 50% or below and shut off when it reaches 80%, but I guess one that stays on for a fixed interval after triggering would really be sufficient.
Thanks for any ideas!