WATER LEVEL INDICATOR USING 7 SEMEGMENTS

GROUP MEMBER Muhamamd Bilal

Mujahid Riaz Hamid Mukhtaar

CONTENTS Background Introduction Components Components

detail Main circuit Empty circuit Partially fill circuit Completely fill

circuit Buzzer circuit

BACKGROUNDMost water level indicators for water tanks are based upon the number of LEDs that glow to indicate the corresponding level of water in the container. Here we present a digital version of the water level indicator. It uses a 7-segment display to show the water level in alphabetical form that is E ,P & C.

INTRODUCTION  The water level indicator is used to measure

the level of water present in the tank. This circuit not only indicates the amount of water present in overhead tank but it also gives an alarm when the tank is full.

 Water level indicator gives you an indication on 7 segment display by displaying E, P and C for empty, partially fill and completely fill, respectively.

COMPONENTS Resistors LED’s Jumper wires 5V Battery IC 7404 IC 7408 Buzzer 7 Segement common Cathode

COMPONENTS DETAIL

IC 7404

IC -7408

7-SEGMENT DISPLAYTypes of 7 segmentCommon cathodeCommon anode

COMMON CATHODE & COMMON ANODE

WATER LEVEL INDICATOR CIRCUIT

WATER LEVEL INDICATOR CIRCUIT

EMPTY CIRCUIT

EMPTY CIRCUIT

TIME 5 6EMPTY 0 1

TIME 9 8EMPTY 0 1

TIME N3 N4

8

EMPTY 1 1 1

maximum voltage drop

ON

IDEAL BEHAVIOUR

PRACTICAL BEHAVIOUR

PARTIALLY FILL CIRCUIT

PARTIALLY

maximum voltage drop

OFF

ON

TIME 9 8EMPTY 1 0

TIME 3 4PARTIALLY

0 1TIME

N3 N4

8

PARTIALLY

1 1 1

TIME 11

10

PARTIALLY

0 1

TIME 9 10 8EMPTY 0 1 0

IDEAL BEHAVIOUR

PRACTICAL BEHAVIOUR

COMPLETELY FILL CIRCUIT

COMPLETE

maximum voltage drop

TIME 3 4PARTIALLY

0 1

TIME 1

2

COMPLTELY

0 1

TIME N1

N2

3

COMPLTELY

1 1 1

TIME 11 10COMPLTELY

1 0

TIME N5

N2

8

PARTIALLY

0 1 0

Ideal behavior Practical behavior

1.6V

1.6V

1.6V

0V

BUZZER CIRCUIT

BUZZER

TIME 9 8EMPTY 0 1

Maximum voltage drop

onon

IDEAL BEHAVIOURPRACTICAL BEHAVIOUR

CONCLUSIONWater is one of the most important element in our life. ALLAH and his Prophet(PBUH) has great blessings for this world. We have to save each and every drop of water. This is one of our effort to save water over flowing from the tank of your sweet house. Overflowing of water can damage the walls of the building but not the wall’s ice cream. You can enjoy its flavours dipped in water…

ANY QUESTION?

THANK YOU…