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Project of
Linear Circuit Analysis
Submitted by
Minahil Asif (BSC02153068)
Hamza Zahid (BSC02153080)
Submitted to
Sir Ahmad Bilal
Submission date 05-1-2016
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Water Level Alarm Using
555 Timer Circuit
Today I am going to talk about a very useful project that I had
taken up. It is called the Water Level Indicator. Nowadays
everybody has overhead tank at their homes. But everyone who
has a water tank above knows the kind of problems that they
face. Firstly there is no system to track the water in the tank.
Then there come a secondary problem that is when their water
pump is started they have no idea when it gets filled up and
sometimes there are situation where the pump keeps on
pumping water to the tank and the water starts spilling out from
the tank. There is wastage of energy as well as wastage of water
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Project Components
In this project we use;• Voltage Source of 9v
• Three Resistances 1. 150 ohm
2. 100 ohm
3. 220 ohm
• One Capacitor of 100 micro farad
• Bread board
• 555 timer circuit
• Water
• buzzer
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Components
9 volt battery
Resistors
150 ohm
100 ohm
220 ohm
4
100 micro farad
555 timer IC
Buzzer
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Bread Board
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Final Picture
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Main Points
In this project ,
1. We use water source to operate speaker as a signal .
2. When the Water level approaches to the maximum level
the buzzer automatically on so that we easily decrease the
level of water.
3. We made a circuit on a bread board.
4. The main thing which we use is 555 timer circuit :
The 555 can be used to provide time delays, as an
oscillator, and as a flip-flop element.
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Working
• Basically the unit is made up of sensor acting as a switch.
Let me explain in a simple way. What happens is when you
turn on you water pump, the water starts to get pumped
from your underground reservoir or from your
underground water supply from the pipes to your water
tank. In the tank there is a sensor. Just think it as a switch,
as the work of the sensor will be to connect a circuit. So the
water starts to get filled in the tank and when the water
level in the tank starts to rise up, what happens when it
reaches to its top most level, there will be a sound from
the unit indicating that the water has filled in the tank and
one can be alerted that the tank has been filled up and the
water pump has to be switched off saving the electricity bill
as well as over flow of water from the tank.
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Connections
• We use bread board as a circuit board .
• We connect two resistors such as 150 ohm and 100 ohm in
parallel and third resistor of 220 ohm in series.
• We place capacitor of 100 micro farad parallel to 100 ohm
resistance.
• A buzzer is connected with 100 ohm resistance in series
which is parallel to capacitance.
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• 555 timer IC consist of 8 legs.
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555 timer IC connection
• 2nd leg connect with 6th leg.
• 4th leg is placed in a tank .
• 8th leg connect with node of 220 ohm resistance
connected with it and one wire which is in the tank
working as negative terminal connected with it.
• 3rd leg with 220 ohm resistance and 150 ohm
resistance.
• 6th leg is connected between 150 ohm resistance and
100 micro farad capacitor.
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There are Four parts in this project:(i) The Sensor Part
It is generally a fixed support inside the tank having some nuts and
bolt with wires coming out.
(ii) The Circuit Part
It comprises the brain of the model, where in all the various inputs
from the sensors are fed. It is the unit from where you will get all
the information of how much of water is in the tank.
(iii) The Power Supply
It is the part where in you will be converting the A/C voltage to a
regulated voltage of 9V to the Circuit.
(IV) The Buzzer Part
It is responsible for bringing up the sound when the water level fills
up in the tank. It will also be having a speaker or a buzzer to alert.
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Circuit Diagram
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Application of Water level Alarm
•
•
•
•
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Over flow problems.
To prevent wastage of water.
To prevent wastage of energy.
Attention And observation.
For sustainable use of water and judicious use
of electricity.
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Use of Water Level Alarm
• In tanks , boilers to indicate level of liquid
inside.
• Use in sea transport for check and balance of
ship.
• Use in houses to check the level of water in
water storage .
• Main use is to safe water .
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Thank you for watching
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