No, it would not work if one of the pins 11 or 12 was connected to ground. One terminal of the sense capacitor (the two copper traces on the water level sensor protoboard) is connected to ground ...

Haya and Taha built a water level sensor. Watching their video (you’ll need to crank the volume) it dawns on us all of the great things that are learned in a project like this.

After trying several, including Galinstan, the liquid chosen was water, made conductive by a dilute suspension of carbon nanotubes (black in the photo). This rests in a flat-bottomed chamber with a ...