Here is another interesting hobby circuit built around the popular and inexpensive 555 IC. It is nothing but a water sensor, which you can be configured as a rain alarm, water tank overflow alarm, ...

Most of the homes in the area where [Raikut] lives have tanks on the roof to hold water. Each is filled from a well using a pump, with gravity serving as a way to pressurize the home’s water supply.

Ultrapure or high purity water has been purified to stringent criteria to eliminate contaminants that can have an adverse effect on people, products or equipment. These can include organic or ...

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