Exhaust Fan that turns On at an adjustable temperature and Off again at a lower temperature?
OK, I've looked all through the postings, and I just can't find what I'm looking for. I've built an enclosure for my pet snake, and I would like to add an exhaust fan that comes on at a certain temperature, and then shuts off again when a lower temperature is set. I don't wish to use Arduino because I'm guessing that there is a fairly simple (cheap) method to do this using a temperature sensor, a 12V DC computer fan, and maybe a potentiometer (so I can adjust what the temperature is held at). Although I have the ability to solder, and I can read circuit diagrams....I lack the basic knowledge to create them for myself. I already did an internet search, and didn't come up with what I was looking for either. I'd rather not spend $60-80 for a store bought unit. Any help would be appreciated.?