• Design And Construction Of A Multiperpose Security System With Alarm And Display

  • CHAPTER ONE -- [Total Page(s) 2]

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    • INTRODUCTION

      The present and likely to continue state of the world economy as a whole and that of Nigeria as yet a developing country in particular has made life uncomfortable and unsatisfactory for the masses.

      Every day, we hear of wars, conflicts, monumental natural disasters, fatal accidents, tribal, racial and religious clashes, to mention just a few.

      All these phenomena always lead to wanton destruction of life and properties worth millions of naira. 

      As a result of these ugly situations today in our country in particular coupled with unemployment, which has led to decline in the standard of living, crime wave has escalated. Because the youths and the young school leavers could not secure any job, which could have kept them busy.

      And since the idle mind is the devils workshop, they indulge in all sorts of  heinous and scandalous crimes in other to make ends meet. Assassination, high-way robbery, house become burglary, arson, car snatching, etc  have become the order of the day. Criminals purposefully set public markets ablaze In order to cart away peoples hard earned merchandise from the markets. Hence the incessant burning of our markets of recent.

      Because of these prevailing conditions and bad condition of our economy, there is the need to safe-guard the already acquired property especially from thieves and fire disasters as the cost of replacing them is beyond the reach of average Nigerian. There is also the need to protect life or building occupant(s) form harm by burglars  or fire incidence.

      Burglary can be traced back to the beginning of age and it was crudely carried out then. But today, it has advanced and become very sophisticated along side with modern technology. Hence, the crude ways used in the time past to the curtail robbery or burglary can no longer contain the present advanced techniques. Therefore, there is the need to device advance technological gadgets to march or subdue the present trend of sophistication demonstrated by burglars.

      However, in the past, kitchens were built separately from the residential houses(s). These kitchens houses firewood’s, cooking utensils etc, while there is no electrical wiring and consequent electrical appliances in the residential buildings. But with development, we now have the kitchen inside the living apartments or flats where kerosene stoves, electrical cookers, boilers or heaters and cooking gas (highly inflammable) are used. there are also electrical wiring and consequent electrical appliances in our rooms. all these are potential causes of fire incidence, which could arise from the leaking of the cooking gas, electrical faults etc. Therefore, early detection of fire and burglar actions and a alarm warning are essential to prevent loss of life and property or harm to building occupant(s) so that the time needed to detect fire ignition, burglar operation and warn building occupant(s) is reduced.

      Hence a corresponding vital margin of safety for evacuation of property and alerting of the police and fire men is possible.

      This   function of burglar and fire detection and giving of alarm warning can be achieved from electronic alarm systems. 

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    • ABSRACT - [ Total Page(s): 1 ]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, sound amplifier and the latch.c) The detection and switching un ... Continue reading---

         

      LIST OF TABLES - [ Total Page(s): 1 ]LIST OF TABLES4.01 Table of various frequencies of operation from the oscillator unit4.11 Table of result of frequency derision4.12 Table for the  74LS153 multiplexer operation4.31 Functional table for D-type flip flop 74LS1754.41 Functional table of 74LS148 priority encoder. ... Continue reading---

         

      LIST OF FIGURES - [ Total Page(s): 1 ]LIST OF FIGURES1.1 Block diagram of multi-purpose alarm system3.1 Flowchart on design and construction procedures4.1 Internal circuit of 555 timer IC4.2 Astable multivibrator circuit using inverters4.3 Output waveform of 555 timer oscillator4.4 Astable circuit configuration, using Rb = Rs + Rp4.5 One short configuration using 555 timer IC  unit 4.6 Waveform of triggered mode4.7 One shot multivibrator circuit4.8 Pin configuration of 74LS1914.11 Functional block diagram for 74LS1534.14 Circuit ... Continue reading---

         

      TABLE OF CONTENTS - [ Total Page(s): 1 ]Title pageApproval pageDedicationAcknowledgementAbstractList of tablesList of abbreviationsTable of contentsCHAPTER ONEIntroductionObjective of the projectProject layoutBackground informationBlock diagramCHAPTER TWOLiterature ReviewCHAPTER THREEDetection and switching unitFire detectorHuman shadow detectorHuman touch sensorThe hatch circuit The alarm circuitThe display boardPower supply unitCHAPTER FOURMethodologyObtaining project topic and specificationsChoosing a suitable circuitSelecting com ... Continue reading---

         

      LIST OF ABRIVATIONS - [ Total Page(s): 1 ]LIST OF ABBREVIATIONS AND SYMBOLSIC Integrated CircuitO/P OutputI/P InputVcc +5 Volt SupplyGND Ground or EarthNE SegmentFF Flip FlopTTL Transistor-transistor logicCMOS Complementary Metallic Oxide Semi Conductor LogicCLK ClockCLR ClearF FrequencyC(exp) ExponentialC/M Count UpC/O Count Down EL Enabled InputEO Enabled OutputNPN Negative-Positive-NegativeVCE Collector Emitter VoltageVBE Base-Emitter VoltageVCB Collector Base VoltageSat SaturationIC CollectorIB Base Curren ... Continue reading---