The main objective of this project was to ensure a proper security to building against theft or intruder. The circuit uses CD4011 Cmos IC which was wired as a timing circuit, as tone generator and amplifier to obtain a maximum audible sound. The CD4011 times the circuits and also generates a tone and this tone is send to transistor which amplifies the tone generated through a loud speaker or buzzer.
This device functions as a major security alarms used in residential, commercial, industrial, and military properties for protection against burglary (theft) or property damage, as well as personal protection against intruders . It is an electronic device that is connected to the battery being installed in and gets activated when the owner of the building is leaving the building by moving the switch to the “set” position. When the system is in this “set” position, if intruder open and enters the building the alarm will start to blow after 20 seconds indicating that unauthorized has entered the building. The device and the “reset” switch are not seen but, it has an indicator light which shows that the alarm has been activated and it can only be reset by the owner of the building when return.
CHAPTER ONE
1.1 INTRODUCTION
The need for having home protection has always been there. But in the recent times, considering a dramatic rise in petty crimes like robbery and theft, the need has been more strongly felt to have a fool proof protection of the belongings and the family members. Home security has come a long way in the last few decades. It was in the hands of a guard who manually provided surveillance during nights in the earlier days, but it was not fool proof as it was only normal for him to have momentary lapse of concentration.
The guard was also susceptible to sleep at times. It was then that home alarm system based upon electronic circuits were developed which proved to be highly reliable and were appreciated by the people as they were relieved from constant monitoring of their homes.
This intruder alarm system uses CD4011 Cmos IC which was wired as a timing circuit, as tone generator and amplifier to obtain a maximum audible sound. The CD4011 times the circuits and also generates a tone and this tone is send to transistor which amplifies the tone generated through a loud speaker or buzzer.
The reset button is used to reset or open circuit the system back to its initial stage. The system is powered with 12V power supply voltage.
The first chapter of this project is narrating on the introduction, the concept of the system and also the aims and objective. Chapter two is all about literature review. Chapter three talks about specification and operation of system component. Chapter four is operation of system. Chapter five is about construction, testing and packaging. Chapter six is conclusion, observation, recommendation and References.
1.2 AIM AND OBJECTIVE
The main aim and objective of the design and construction this project is to create a comfort in the minds of house owners when they out from their premises without much fear of intruder.
1.3 SIGNIFICANCE OF THE PROJECT
This device functions as an electronics watch dog. This device functions as a major security alarms used in residential, commercial, industrial, and military properties for protection against burglary (theft) or property damage, as well as personal protection against intruders.
1.4 PURPOSE OF THE PROJECT
This project proposes the development of security system for form houses and residential houses.
1.5 SCOPE OF THE PROJECT
In an extremely mechanized word such as today’s it is necessary to make our life better, convertible and economical. This is the purpose for which the Electronic house is developed.
The circuit uses CD4011 Cmos IC which was wired as a timing circuit, as tone generator and amplifier to obtain a maximum audible sound. The CD4011 times the circuits and also generates a tone and this tone is send to transistor which amplifies the tone generated through a loud speaker or buzzer.
1.6 APPLICATION OF THE PROJECT
This device is used in the following places as:
- Home Security Systems.
- Prisons Security.
- Vehicle Security.
- Broadband alarm monitoring.
- Glass Break.
- Property Theft Alarm
1.7 PROJECT WORK ORGANISATION
The various stages involved in the development of this project have been properly put into five chapters to enhance comprehensive and concise reading. In this project thesis, the project is organized sequentially as follows:
Chapter one of this work is on the introduction to an intruder alarm. In this chapter, the background, significance, objective limitation and problem of an intruder alarm were discussed.
Chapter two is on literature review of an intruder alarm. In this chapter, all the literature pertaining to this work was reviewed.
Chapter three is on design methodology. In this chapter all the method involved during the design and construction were discussed.
Chapter four is on testing analysis. All testing that result accurate functionality was analyzed.
Chapter five is on conclusion, recommendation and references.
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