An automatic water level controller is a device which senses undesired low and high water levels in a tank, and switches a water pump ON or OFF accordingly to maintain […]
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Make this Simple Buzzer Circuit with Transistor and Piezo
In this article we learn how to make a very simple circuit for buzzer using piezo electric transducer, two resistors, a small coil and a BC547 transistor. A buzzer is […]
10 Automatic Emergency Light Circuits
The article describes a 10 simple automatic emergency light circuits using high bright LEDs. This circuit can be used during power failures and outdoors where any other source of power […]