This is something random I made. It is a concept of a system that maintains the humidity of a tank for an American Toad. No, the humidity does not go down this fast. This is just so the demo can actually be shown without wasting your time. (Micro:bit Concept Below!) The thing doing all the logic is a Micro:bit 2.1, keeping the humidity in a range of 50-60%. There is a humidity sensor to tell the micro:bit how humid it is inside the tank, and there is a misting spray bottle with a motor with a paddle that presses on the trigger on the spray bottle. If the humidity does still get low (Possibly due to an empty spray bottle) The micro:bit will sound an alert if it gets to, or below, 45% humidity. If it is in the comfort zone of 50-60% humidity, it will show a heart after the humidity is shown when you press A to show the humidity.
I will possibly be putting this concept to work after I get all the supplies and get my tank set up. I also need to fix my 3D Printer.