Making a water overflow sensor | Make a water overflow sensor very easily with BC547 transistor 

In this video, I made a water overflow sensor using BC547 transistor. You can put this water overflow sensor on top of the pump door or basin or.... so that you will be informed as soon as the tank is full and cut off the water supply. This water overflow sensor is the simplest circuit and it can be made very easily.
To make the device work again, according to the video, after removing the sensor, slide your finger on the two sockets to remove the tiny drops of water between the two sockets.
Join me to take a look at how it is made and enjoy its construction and technology.
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