Water Tank Overflow Alarm Circuit Tutorial with BC547 Transistor and Relay 

Welcome to our channel! In today’s tutorial, we’ll show you how to build a simple yet effective water tank overflow alarm using a BC547 transistor and a relay. This project is perfect for keeping your water tanks in check and preventing overflow disasters.
Required components,
(1) 12v Relay. 1
(2) 1N4007 Diode. 1
(3) Bc547 NPN Transistor. 1
(4) 5mm Led. 1
(5) 100k ohms Resistor. 1
(6) 1k ohms Resistor. 1
(7) 12v Buzzer. 1
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