Here we describe an electronic system that uses a dedicated water-level sensor to switch off the pump motor as soon as the ...

Sometimes we need a non-contact liquid level sensor. There are several ways to build that, but the easiest is to try an optical liquid level sensor. You may already have an idea in mind since you are ...

[Mark Smith] must really, really like his coffee, at least judging by how much effort he’s put into tricking out his espresso machine. Directly adjacent to the float track on the outside of the tank ...