Do you get sick of your cheap piece of crap AC unit making things too cold, like I do?--but when you turn it off, the room gets too hot; dumb thing doesn't have a decent thermostat.

In this tutorial I will show you how to make a device that automatically regulates temperature, or that activates a device when the temperature reaches a certain point. This could be any device, but for example, I will be using an air conditioner in an upstairs bedroom.