This overflow alarm for your water tank emits a buzzing sound when it's too full, similar to the way your phone vibrates. It'll give you enough time to rush over and take care of the issue by turning the water off. Water can cause extensive damage to both your belongings as well as your home's infrastructure. This quick, little DIY tank alarm will give you peace of mind and prevent you from having to deal with the consequences of overflow.

Things Needed

>BC547 NPN Transistor – 1 piece.

>100 ohm resistor – 2 pieces.

>Buzzer 9v – 1 piece.

>1000uf/25v electrolytic capacitor – 1 piece.

>Blinking led – 1 piece. (for indication)

>Switch – 1piece.

> Rainbow Cable – 1m length.

>9v Battery – 1piece.

9v battery cap – 1 piece.

Have you been able to use this water tank overflow alarm? How did it work out?

Article and Photo Source: Instructables