some questions

[taytay]

I want to set up a terrarium. I've seen all your images on backgrounds and they helped me a lot. I feel I need information / images on another subject - the electronic side of the terrarium.
How did you wire everything to function automatically? is there a way to build a computer to respond to the heat/temp instrument and operate in accordance with the waterfall, fans and lighting?

In addition, I have a relatively small aquarium and thought to place two fans. One will be internally and maintain circulation of air, and other external to pump air out of the terrarium to cool it down. anyone Tried a trick like this before?
i live in a very hot state and will need a good way to cool my tank, any suggestions?

Thanks in advance.