16-07-2014, 03:07 PM
Water Level Indicator
[attachment=65895]
Introduction
This circuit is designed to determine the water level
especially in a water tank.
As the water level increases from the base of the tank the number
of glowing LEDS increases subsequently.
Amount of water present in a water tank can be easily measured.
About Circuit Elements
Transistor A1015:
This is key element in circuit. It is used as switch.
The important property of this Transistor Is, this transistor give out put
from collector only when its base voltage is at some –ve potential than
its emitter.
1 k ohm Resistors:
As described before, Transistor A 1015 can only be turned on if base
is at low voltage than emitter. In order to set the voltage bellow 12 V
we put 1 k ohm resistor, setting base to some low voltage
Working of Circuit
When any wire is dipped in water that wire will be connected to wire N through water, establishing a negative voltage across the base of transistor. Current begins to flow from collector. In this way, LED glows.
After successive connections of wires with N, respective LEDs will glow, and when wire F will be connected to N , then there will be sound alarming you that water has attained maximum level and after this water will flow over
Applications of Circuit
This Circuit has a number of practical uses in daily life.
Now no need to go on the roof to check the water level.
Can be used to measure underground storage of water.
Water level Indicator works to maintain a constant water level.
(Used in different Plants and Industries)
Alarm starts ringing as soon as tank becomes full.
It helps to check overflow and wastage of water
by warning the person when the tank is about to brim.
It can also be used to calculate incoming and out going water
in large reservoirs.
It is used to predict the arrival of floods.
[attachment=65895]
Introduction
This circuit is designed to determine the water level
especially in a water tank.
As the water level increases from the base of the tank the number
of glowing LEDS increases subsequently.
Amount of water present in a water tank can be easily measured.
About Circuit Elements
Transistor A1015:
This is key element in circuit. It is used as switch.
The important property of this Transistor Is, this transistor give out put
from collector only when its base voltage is at some –ve potential than
its emitter.
1 k ohm Resistors:
As described before, Transistor A 1015 can only be turned on if base
is at low voltage than emitter. In order to set the voltage bellow 12 V
we put 1 k ohm resistor, setting base to some low voltage
Working of Circuit
When any wire is dipped in water that wire will be connected to wire N through water, establishing a negative voltage across the base of transistor. Current begins to flow from collector. In this way, LED glows.
After successive connections of wires with N, respective LEDs will glow, and when wire F will be connected to N , then there will be sound alarming you that water has attained maximum level and after this water will flow over
Applications of Circuit
This Circuit has a number of practical uses in daily life.
Now no need to go on the roof to check the water level.
Can be used to measure underground storage of water.
Water level Indicator works to maintain a constant water level.
(Used in different Plants and Industries)
Alarm starts ringing as soon as tank becomes full.
It helps to check overflow and wastage of water
by warning the person when the tank is about to brim.
It can also be used to calculate incoming and out going water
in large reservoirs.
It is used to predict the arrival of floods.