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Water Alarm

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Submitted By rohanp92
Words 500
Pages 2
Project Problem

In most of the houses in India, we use a manual switch to turn the motor ON/OFF which is used to fill the overhead tank. In such cases the switch is turned OFF only after water starts to overflow from the tank.
This in most of the cases leads to a lot of water wastage since the water that overflows, flows into the drains.
To overcome the issue of water overflowing from the overhead tank, a device can be installed. This device would buzz when the water in the overhead tank is about to overflow, giving the residents enough time to turn the switch OFF. Hence saving lot of water.
The device is also capable of displaying the amount of water in the overhead tank through various LED’s. Approach to the Problem:

The main requirements of the water level indicator are:
• Low power consumption
• Simplified result
• Compact
• Economical
The recommended solution to the given issues:
• Use of LED’s enables low power consumption and economical
• Use of multiple LED’s gives a simplified result
• Use of single IC makes the computation less complex Literature Survey

IC 4066
The 4066 is a Quad Bilateral Switch that can be used with digital or analog signals.

Transistor BC148
It is a plastic version of a standard NPNT transistor and is used for small signal general purpose amplification.
SPST Switch (Single Pole, Single Throw)
A simple ON-OFF switch, the two terminals are either connected together or disconnected from each other. An example is a light switch.
Piezoelectric Buzzer
High performance buzzers are used for indoor operations and are moisture resistant.
LED (Light Emitting Diode)
Low cost semi-conductor light source, which works on the principle of electroluminescence. Problem Solution
The circuit diagram of a simple corrosion free water level indicator for home usage is given below. In fact this device can also

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