Design And Construction Of Electronic Combination Lock System For Two Users

Electrical Electronics Engineering | Engineering

The design and construction of an electronic combination lock system for two users involves the integration of electronic components and programming to create a secure access control mechanism. This system typically consists of a microcontroller unit, such as an Arduino or Raspberry Pi, connected to a keypad for input and a locking mechanism, such as a solenoid or motor, for physical security. Each user is assigned a unique combination code, which they enter through the keypad to gain access. The microcontroller verifies the input against the stored combinations and activates the locking mechanism if the code matches, granting access to the authorized user. Additional features like a display screen for user feedback, multiple levels of access permissions, and remote monitoring capabilities can enhance the system’s functionality and security. Through careful design and implementation, an electronic combination lock system provides a reliable and user-friendly solution for controlling access to secured areas or devices, offering convenience and peace of mind to its users.

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.

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.

ABSTRACT

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.

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 DESCRIPTION

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
Avoid excessive key duplication for everyone in the
Make the apartment where it is installed more difficult to break

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.

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