This document describes a water level indicator circuit that uses a 7-segment display to indicate the water level in a tank. It lists the group members and components of the circuit, including resistors, LEDs, batteries, IC chips, a buzzer, and 7-segment display. It provides details on the main circuit and how it functions in empty, partially filled, and completely filled states of the tank, displaying E, P, and C respectively on the 7-segment display. It concludes by thanking the reader.

2. WATER LEVEL INDICATOR
USING 7 SEMEGMENTS

3. GROUP MEMBER
 Muhamamd Bilal
 Mujahid Riaz
 Hamid Mukhtaar

4. CONTENTS
 Background
 Introduction
 Components
 Components detail
 Main circuit
 Empty circuit
 Partially fill circuit
 Completely fill circuit
 Buzzer circuit

5. BACKGROUND
Most 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.

6. 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.

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

8. COMPONENTS DETAIL

9. IC 7404

10. IC -7408

11. 7-SEGMENT DISPLAY
Types of 7 segment
Common cathode
Common anode

12. COMMON CATHODE & COMMON ANODE

13. WATER LEVEL INDICATOR
CIRCUIT

14. WATER LEVEL INDICATOR CIRCUIT

15. EMPTY CIRCUIT

16. EMPTY CIRCUIT
TIME 5 6
EMPTY 0 1
TIME 9 8
EMPTY 0 1
TIME N3 N4 8
EMPTY 1 1 1
maximum voltage
drop
ON
IDEAL
BEHAVIOUR
PRACTICAL
BEHAVIOUR

17. PARTIALLY FILL CIRCUIT

18. PARTIALLY
maximum voltage
drop
OFF
ON
TIME 9 8
EMPTY 1 0
TIME 3 4
PARTIAL
LY
0 1
TIME N3
N4
8
PARTIALL
Y
1 1 1
TIME 11 10
PARTIALL
Y
0 1
TIME 9 10 8
EMPTY 0 1 0
IDEAL
BEHAVIOUR
PRACTICAL
BEHAVIOUR

19. COMPLETELY FILL CIRCUIT

20. COMPLETE
maximum voltage drop
TIME 3 4
PARTIAL
LY
0 1
TIME 1 2
COMPLTE
LY
0 1
TIME N1 N2 3
COMPLTE
LY
1 1 1
TIME 11 10
COMPLTEL
Y
1 0
TIME
N5
N2 8
PARTIAL
LY
0 1 0
Ideal behaviorPractical behavior
1.6V
1.6V
1.6V
0V

21. BUZZER CIRCUIT

22. BUZZER
TIME 9 8
EMPTY 0 1
Maximum voltage
drop
on
on
IDEAL
BEHAVIOUR
PRACTICAL
BEHAVIOUR

23. CONCLUSION
Water 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…

24. ANY QUESTION?

25. THANK YOU…