RPi zero w with LM393 / "flying fish" sensor

[ghayne]

This may be of interest to people interested in water sensors:

Cheap water level sensor

I had a water leak in our airing cupboard cold water header tank a few weeks ago. The ballcock valve was leaking and whoever installed the tank had put the overflow pipe HIGHER than the inlet pipe, not a real problem but the inlet seal was leaking - no real damage done thankfully. I have been looking around for solutions to sense the level for an alarm system. I was looking through my components the other day and had a "aha" moment when I saw one of these: [barreljack] . I intend gluing thi…