Using an Arduino to automatically sense the water level and turn on a pump

I got excited seeing what the maker community has come up with to help with the ongoing crisis and PPE shortage, but I noticed that for Face Shields, the hardest part to source was the clear screen, so I designed an alternative. Optimized to be made with readily-available materials.

I went with the omnipresent, 2-liter bottle for the screen and a hair tie or rubber band for the back. No other materials necessary.

I also made a cutting guide, so that the 2-liter bottles can be perforated quickly and precisely, and pins to hold it in place while it’s perforated.