PROJECT REPORT

GAS LEAKAGE ALARM PROJECT

Submitted to the Department of

ELECTRONICS AND COMMUNICATION ENGINEERING

INDERPRASTHA ENGINEERING COLLEGE, GHAZIABAD

63, Site 4, Industrial Area, Sahibabad, Ghaziabad, Uttar Pradesh.

Gautam Buddha Technical University

PROJECT GUIDE: MRS. SHIKHA GUPTA

SUBMITTED BY:

UDIT JAIN (0903031113)

CERTIFICATE

This is to certify that minor project report on “GAS LEAKAGE

ALARM” which is submitted by UDIT JAIN in partial fulfilment

of the requirement for the degree of B.Tech in department of

Electronics and Communication Engineering of Inderprastha

Engineering College , is a record of his own work carried out

under my/our supervision. The matter embodied in this thesis

is original and has not been submitted for the award of any

degree.

Project Guide:

MRS.SHIKHA GUPTA

SubmittedBy:

UDIT JAIN

DECLARATION

I hereby declare that this submission is my own work and that

to best of my knowledge and belief. It contains no material

previously published or written by any person or material

which to a substantial extent has been accepted for the award

of any other degree or diploma of the university or other

institute of higher learning, accept where due

acknowledgement has been made in the text.

UDIT JAIN

DATE OF SUBMISSION:

3/12/2012

ACKNOWLEDGEMENT

It gives me a great sense of pleasure to present the report of the Electronic Circuit Design Lab Project undertaken during B.Tech, final year. I acknowledge the enormous assistance and excellent co-operation given by my respected mentor MRS. SHIKHA GUPTA and Mr. VIPUL BHATNAGAR. Their sincerity, thoroughness and perseverance has been a constant source o inspiration for me. I also take the opportunity to acknowledge the contribution of Professor A.K. Giri , Head of Department of Electronics & Communication Engineering , Inderprashtha Engineering College , Sahibabad for his full support and assistance during the development of the project. Also, I would like to express my heartfelt indebtedness towards all faculty members and staff members of the department for their kind assistance and cooperation during the development of my project. Last but not the least, I acknowledge my friends who helped me directly or indirectly for the success of project.

CONTENTS

AIM OF PROJECT

COMPONENTS REQUIRED

SIMULATION TOOL USED

CIRCUIT DESCRIPTION

SIMULATION RESULT

OBSERVATION

RESULT

DATA SHEETS OF MAJOR COMPONENTS

REFERENCES

AIM OF PROJECT:

This Project is designed to detect the LPG Gas Leakages and to a

lerts the users through Audio-Visual Indications. This Project is

designed to detect the LPG & 4 other Dangerous Gases from a range

200(PPM) to 10,000 PPM. Whenever there is LPG concentration of

1000 ppm (parts per million) in the area, A buzzer is connected to

produce audible alert signal. This LPG Gas Sensor can be used to ma

ke wireless Gas leak detector in home security system .

COMPONENTS REQUIRED:

S.no Components used Range/Type Quantity

1 SEN-1327 gas sensor 200ppm-10,000ppm 1no

2 IC 555 TIMER (8 pin) 4.5 to 15 V(Vcc) 1no

3 Transistor SL100 1no

4 Zener diode 5V 1no

5 Speaker 0.5W,8 Ω 1no

6 Battery 9V 1no

7 LED 1V 1no

8 Capacitors 0.1uf 2no

9 Resistors

Variable resistor

10kΩ

4.7kΩ

1kΩ

22 Ω

560Ω

10kΩ

1no

1no

1no

1no

1no

1no

10 On /off switch and

Connecting wires

______ ______

SIMULATION TOOL USED:

PSpice v16.0

PSpice is a SPICE analog circuit and digital logic simulation program

for Microsoft Windows. The name is an acronym for Personal

Simulation Program with Integrated Circuit Emphasis.

CIRCUIT DESCRIPTION:

DESIGN OF THE PROJECT:

In this project we have used MQ-6 gas sensor. Whenever LPG gas is

leaked the sensor detects and it passes signal to timer circuit. Here

we have used IC 555 timer which acts as astable multivibrator.Then it

will be given to Transistor driver circuit which activates buzzer and

LED and alerts the user through audio-visual indications.

MQ-6 gas sensor is used in the gas sensor module. The sensor can

also be used to detect combustible gases, especially methane.

The circuit operates off a 9V PP3 battery. Zener diode ZD1 is used to

convert 9V into 5V DC to drive the gas sensor

Whenever there is LPG concentration of 1000 ppm (parts per million)

in the area, the OUT pin of the sensor module goes high. This signal

drives timer IC 555, which is wired as an astable multivibrator. The

multivibrator basically works as a tone generator.

Output pin 3 of IC 555 is connected to LED1 and speaker-driver

transistor SL100 through current-limiting resistors R5 and R4,

respectively. LED1 glows and the alarm sounds to alert the user of

gas leakage. The pitch of the tone can be changed by varying preset

VR1. Use a suitable heat-sink for transistor SL100.

SIMULATION RESULTS:

OBSERVATIONS:

The LED glows and BUZZER beeps whenever there is logic high at

the pin 4 of 555 timer ic.

RESULT:

Circuit has high sensitivity to propane, butane, isobutene,LPG and

natural gas. The sensor can also be used to detect combustible

gases, especially methane. This circuit has been tested with LPG gas

and was found to work very fine.

DATA SHEETS OF MAJOR COMPONENTS:

Three major components used in this project are:

1). IC- LM 555 timer

2). MQ-6 LPG gas sensor

3). SL100 transistor

Their Data sheets are attached within the report.

REFERENCES

o www.wikipedia.org

o www.datasheetreference.com

o www.electronicsforu.com

o www.examsadda.com