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TITLE PAGE

 

BY

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--/H2013/01430
DEPARTMENT OF ----
SCHOOL OF ---
INSTITUTE OF ---

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APPROVAL PAGE

This is to certify that the research work, "design and construction of electronic combination lock system for two users" by ---, Reg. No. --/H2007/01430 submitted in partial fulfillment of the requirement award of a Higher National Diploma on --- has been approved.

By
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Supervisor                                                  Head of Department.
Signature……………….                           Signature……………….        

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External Invigilator

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DEDICATION
This project is dedicated to Almighty God for his protection, kindness, strength over my life throughout the period and also to my --- for his financial support and moral care towards me.Also to my mentor --- for her academic advice she often gives to me. May Almighty God shield them from the peril of this world and bless their entire endeavour Amen.

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ACKNOWLEDGEMENT

The successful completion of this project work could not have been a reality without the encouragement of my --- and other people. My immensely appreciation goes to my humble and able supervisor mr. --- for his kindness in supervising this project.
My warmest gratitude goes to my parents for their moral, spiritual and financial support throughout my study in this institution.
My appreciation goes to some of my lecturers among whom are Mr. ---, and Dr. ---. I also recognize the support of some of the staff of --- among whom are: The General Manager, Deputy General manager, the internal Auditor Mr. --- and the ---. Finally, my appreciation goes to my elder sister ---, my lovely friends mercy ---, ---, --- and many others who were quite helpful.

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This project is on electronic combination lock system for two users. It is design to meet up with the security demand of properties against theft.
The electronic combination lock system for two users is an electronic locking device which operates by means of electric current. Electric locks are sometimes stand-alone with an electronic control assembly mounted directly to the lock. More often electric locks are connected to an access control system. The advantages of an electric lock connected to an access control system include: key control, where keys can be added and removed without re-keying the lock cylinder; fine access control, where time and place are factors; and transaction logging, where activity is recorded.
Perhaps the most prevalent form of electronic lock is that using a numerical code for authentication; the correct code must be entered in order for the lock to deactivate. Such locks typically provide two different keypads for different users, and some feature an audible response to each press. Combination lengths are usually between 4 and 6 digits long.
Electronic combination lock system for two users is designed to activate or open a circuit when the right code is entered and to remain dormant when the wrong code is pressed indicating an unauthorized user. The system makes use of 12V supply and decade counter integrated circuits.

TABLE OF CONTENTS

 TITLE PAGE

APPROVAL PAGE
DEDICATION
ACKNOWLEDGEMENT
ABSTRACT
TABLE OF CONTENT

CHAPTER ONE

• INTRODUCTION
• BACKGROUND OF THE PROJECT
• BACKGROUND OF THE PROJECT
• AIM AND OBJECTIVE OF THE PROJECT
• ADVANTAGES OF NUMERIC DOOR LOCK SYSTEM
• APPLICATIONS OF THE PROJECT
• LIMITATION OF THE PROJECT
• DEFINITION OF TERMS
• PROJECT WORK ORGANISATION

CHAPTER TWO

2.0      LITERATURE REVIEW
2.1      HISTORICAL BACKGROUND OF HOME SECURITY

2.2      REVIEW OF DOOR SECURITY
2.3     REVIEW OF DOOR SECURITY DEVICES

2.4    REVIEW OF DIGITAL KEYPAD DOOR ENTRY
2.5     REVIEW OF RELATED STUDIES
2.6   REVIEW ON LOCKS

CHAPTER THREE

3.0      CONSTRUCTION METHODOLOGY

3.1      PRINCIPLE OF OPERATION

3.2      CIRCUIT DIAGRAM

3.3      CIRCUIT DESIGN

3.4      CIRCUIT DESCRITION

CHAPTER FOUR
RESULT ANALYSIS
4.0      CONSTRUCTION PROCEDURE AND TESTING
4.1      CASING AND PACKAGING
4.2      ASSEMBLING OF SECTIONS
4.3      TESTING AND RESULT OF SYSTEM

CHAPTER FIVE     
5.1      CONCLUSION
5.2      RECOMMENDATION
5.3      REFERENCES

 

CHAPTER ONE
1.0                                                                       INTRODUCTION
1.1                                           BACKGROUND OF THE STUDY
Traditional lock systems using mechanical lock and key mechanism are being replaced by new advanced techniques of locking system. These techniques are an integration of mechanical and electronic devices and highly intelligent. One of the prominent features of these innovative lock systems is their simplicity and high efficiency.  Such an automatic lock system consists of electronic control assembly which controls the output load through a password. This output load is an electromechanical lock. Here we develop an electronic code lock system decade counter IC, which provides control to the actuating the load. It is a system with input from the keyboard and the output being actuated accordingly. This system demonstrates a password based door lock system wherein once the correct code or password is entered, the door is opened and the concerned person is allowed access to the secured area. Again if another person arrives it will ask to enter the password. If the password is wrong then door would remain closed, denying the access to the person.

1.2                                        PROBLEM STATEMENT
One could attest to the fact that the metallic keys used to access mechanical door locks are very susceptible to getting lost, which would mean breaking the locks over and over again if there are more occurrences of such scenarios, moreover, such access keys can be duplicated by unauthorized users.
Using an electronic door lock as said earlier would counteract the damning consequences of such repugnant occurrences. This study came to overcome these challenges by using a password / numerals instead of traditional lock.

1.3                                   AIM AND OBJECTIVE OF THE PROJECT
The main aim of this work is to design a security door device that can be used to control a door when the right password is pressed using a keypad. The objectives are to:

• Eliminate the use of mechanical/metallic keys
• Prevent events of key misplacements.
• Avoid excessive key duplication for everyone in the house.
• Make the apartment where it is installed more difficult to break into.

1.4                         ADVANTAGES OF NUMERIC DOOR LOCK SYSTEM

• This project provides security
• Power consumption is less
• Used commonly available components
•  Project is simple and easy

1.5                                         APPLICATIONS OF THE PROJECT

• This simple circuit can be used at residential places to ensure better safety.
• It can be used at organizations to ensure authorized access to highly secured places.
• With a slight modification this Project can be used to control the switching of loads through password.

1.6                                   SCOPE / LIMITATION OF THE PROJECT

The scope of this study covers the building an electronic locking system for two users. The system is designed to activate or open a circuit when the right code is entered and to remain dormant when the wrong code is pressed indicating an unauthorized user. The system makes use of 12V supply and decade counter integrated circuits.

Limitations of electronic combination lock system for two users are:

• It is a low range circuit, i.e. it is not possible to operate the circuit remotely.
• If you forget the password it is not possible to open the door.
• Two different users with different code can use the device.

1.7                                                  DEFINITION OF TERMS
Secure Area: A designated area in which access into and out of is controlled and can be monitored.
Secure Door: A door in which access through is controlled and can be monitored.
Shielding: Providing electrical isolation for a circuit, component, or wire by enclosing or isolating the circuit, component, or wire with a metal enclosure, plate, or foil that blocks any interfering electrical field.
Short Circuit: An unintentional connection that provides a low resistance path between two points in a circuit or between a point in a circuit and ground. A Short Circuit can drastically affect the operation of a circuit. If excessive current flow results from the Short Circuit, a device may be damaged or ruined.
Spike: A voltage peak of high amplitude and short duration.
Suppression: The addition of a device to an electrical circuit that minimizes or prevents transients from affecting the proper operation of that circuit.
Switch: A device used to either connect or interrupt an electronic circuit.

1.8                                        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 the study. In this chapter, the background, significance, objective limitation and problem of system were discussed.
Chapter two is on literature review of the study. 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.

CHAPTER FIVE
5.1                                                           CONCLUSION
Door security systems are any device or system designed to prevent unauthorized access through a doorway, such as occurs during a break-in or burglary. They can take many forms: locks, chains, reinforcements, and alarms. Door construction itself is an important factor for door security as inferior materials or assembly methods can compromise a door's ability to maintain structural integrity during a break in.
The first consideration in any comprehensive door security plan is the construction of the door and its frame. Strongly constructed metal or solid wood doors with reinforced frames resist forced entry much better than cheaper laminated or hollow core doors. Laminated doors can splinter and de-laminate when struck forcefully. Solid wood or steel doors are much harder to damage, although sometimes a compromise is reached by reinforcing a laminated door with a metal plate that wraps around the door from front to back in the area where the lock is located. Reinforced door frames and door jambs are also important for structural integrity and can help prevent a door from being compromised by brute force.
Locks are the single most common type of door security and can take many forms. Standard doorknobs have locks which lock the door bolt in place, but these are not especially strong in most cases. A typical exterior door on many homes will have a separate keyed lock that operates a deadbolt, which is a metal bar that extends from the lock into the door frame to hold the door in place. These locks, when properly installed are reasonably effective. Some deadbolt locks are designed to be resistant to picking and tampering and may be mounted on the door with a large metal plate for reinforcement and added strength.
Other types of door locks are possible as well, including sliding chain locks which allow the door to be opened slightly when engaged, but prevent removal of the chain. Hook and eye latches, manual sliding bars, and other specialty locks and latches are also sometimes used. Metal or wooden blocks or bars placed across the door, extending over the frame in either direction are another very simple type of lock, although this may also be considered a type of reinforcement.
Door reinforcement can take many forms besides built-in or structural improvements like reinforced jambs and frames. Bars, locking doorstops, and braces can be used to reinforce a door, preventing it from being opened even if the lock is compromised. These kinds of devices, such as a bracing bar, typically mount on the floor and extend to the door. A sturdy floor mount anchors one end of the bar, which extends towards the door at an angle, where it locks in place in another fixture. These types of braces are very strong, making it nearly impossible to force open a door.
Alarm systems are another important form of door security. Electronic systems sound an alarm, either on-site, at a remote location that is monitored, or both. Local alarms can frighten off potential intruders, and remote monitoring can notify authorities automatically or alert a human monitor that an intrusion has occurred so that they can take appropriate action.
Some door security devices and systems don't really fit into any of these categories. Door viewing ports, or spy-holes, allow for direct visual inspection of visitors or potential intruders. Cameras serve the same purpose but allow for remote visual monitoring and long term recording of the door and surroundings for future reference if necessary. Intercom devices allow for secure communication from one side of the door to the other, and hinge screws are special devices that hold a door in place even if the hinge pins have been removed.

5.2                                                    RECOMMENDATION
This project is designed to be used in our homes, engineering laboratory, offices and industries where there is need for an keypad door system. And should be used and maintain by a qualified personnel.

 

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CHAPTER TWO: The chapter one of this work has been displayed above. The complete chapter two of "design and construction of electronic combination lock system for two users" is also available. Order full work to download. Chapter two of "design and construction of electronic combination lock system for two users" consists of the literature review. In this chapter all the related work on "design and construction of electronic combination lock system for two users" was reviewed.

CHAPTER THREE: The complete chapter three of "design and construction of electronic combination lock system for two users" is available. Order full work to download. Chapter three of "design and construction of electronic combination lock system for two users" consists of the methodology. In this chapter all the method used in carrying out this work was discussed.

CHAPTER FOUR: The complete chapter four of "design and construction of electronic combination lock system for two users" is available. Order full work to download. Chapter four of "design and construction of electronic combination lock system for two users" consists of all the test conducted during the work and the result gotten after the whole work

CHAPTER FIVE: The complete chapter five of "design and construction of electronic combination lock system for two users" is available. Order full work to download. Chapter five of "design and construction of electronic combination lock system for two users" consist of conclusion, recommendation and references.

 

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