98 Pages
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12,039 Words
1.0 INTRODUCTION As the quest for change over on public power supply and stand by generation increase. Engineering have researches deep into the different methods of achieving to both manual and automatic types. It may not be taken seriously in some places where power supply is up to 90 constant or where intermittent outage causes no great damage. However, place where they have business centers, industrial centers and even cold rooms n […]
71 Pages
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8,311 Words
This project report is a thesis written specifically to cover the design analysis construction, test and packaging of a multipurpose security system from electric component that can be easily be obtainable from the market. The report discusses the various unit and stages of the alarm system, thesis include:- a) Clock generation and frequency division unit. b) The control and section unit, comprising of a one shot 555 timer multiplexer, […]
43 Pages
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5,965 Words
1.0 INTRODUCTION As the zeal for change over on public power supply and stand-by generator increases, Engineers have researched deep into the different ways and methods of achieving power change-over both manual and automatic types. It may not be considered a serious issue in some places where supply is up-to 90% constant or where intermittent outage causes no great damage. However, places like the business centers, industrial areas, a […]
33 Pages
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3,849 Words
1.1 INTRODUCTION Change over switch is a device used to switch off a power supply and subsequently switch on another power source. Basically it is aimed at switching on a more convenient power supply to the load. Since it switches on power to the load precaution has to be taken while choosing the type of change over switch. Also size, arcing control are put into consideration in the choice. A good switch should be the one whose contact […]
64 Pages
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10,002 Words
1.0 INTRODUCTION 1.1 BACKGROUND OF THE STUDY 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 […]
35 Pages
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5,041 Words
Aim: This main aim of this work is to build a simple fire alarm. Fire alarm is an electronics device that is stored in a building to detect the presence of fire accident. An automatic fire alarm system is designed to detect the unwanted presence of fire by monitoring environmental changes associated with combustion. Method: The device was first built on a breadboard which is later transfer to vero board and soldered. Result: The devi […]
56 Pages
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7,447 Words
Sensitive Touch Alarm system is an electronic device that can be used as a security device. It is an electronic watch dog, because when installed to a door, and somebody touches the door, it sounds an alarm. The unit is built from discrete semi conductor device. It is relatively simple in both its operation and analysis. One particular feature of this project circuit (the door alarm system) is its versatility. The circuit can be adapte […]