Check out the new water level sensor circuit. The simple water level indicator circuit presented here makes this system automatic, i.e. it switches on the pump when the water level in the overhead ...

A low-voltage electronic circuit that senses upper and ... input of the U2C and U2D op amps. When the water is below level A, the sensors are both open circuits and the outputs of the comparators ...

[Raikut] made this process a lot easier by designing an LED bar indicator to monitor the water level. The sensor is very simple. Each LED is basically its own circuit controlled by a transistor ...

This simple water level indicator will activate an active buzzer (e.g. BeStar BPT-23CX ) in order to make a noise when a certain level of water is being reached. Because the water sensor and the ...