I'll look into to these things.
This is the dreaming about it part for me.
You got to work through the thoughts and ideas so when money is spent there are no regrets.
I can't remember how many times I bought before I was sure and ended up with parts on hand and no immediate use for them.
Friendly_Grower
today, there are so many capabilities with electric and electronic parts, literary, even if this thing is operated at 24 v, you can find custom board to run it and connect it to your arduino that works on 5v and has 20mA output on his pins... and were not even talking about adding something like a timer for when its night it opens and intakes fresh, cold air, in short, programming logic... i usually start my process from the most ideal thing i need, then i search for existing solutions, if there are none, i think about how to make my own, and is it plausible to do so, or can i maybe adjust my system to a product i learned about in search for existing solution, and i let my ideas sit and cook, until i buy anything...