1. What do I put the Arduino actually in? Is there some common Arduino housings that people use?
2. What Power Source will I need to use? Can I use 1 power source for the Arduino and the Fan?
3. How do I switch on 120v devices? Is there a simple cheap relay that would work for this?
4. How will I adjust when I want the fan to come on (like at what temp) and would I see what temperature it is.
Would I need and LCD screen?
Buttons to modify some settings?
I'm just asking you to let me know how would you do all of this and why.