Design And Construction Of A Microcontroller Based Electronic Locking System Using Password

ABSTRACT

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 can be a motor or a lamp or any other mechanical/electrical load.

Here we develop an electronic code lock system using microcontroller, which provides control to the actuating the load. It is a simple embedded 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.

TABLE OF CONTENT

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWLEDGEMENT

ABSTRACT

TABLE OF CONTENT

CHAPTER ONE

1.0 INTRODUCTION

1.1 OBJECTIVE OF THE PROJECT

1.2 SIGNIFICANCE OF THE PROJECT

1.3 SCOPE OF THE PROJECT

1.4 STATEMENT OF PROBLEM

1.5 LIMITATION OF THE PROJECT

1.6 APPLICATION OF THE PROJECT

1.7 PROJECT ORGANISATION

CHAPTER TWO

2.0 LITERATURE REVIEW

2.1 REVIEW OF DOOR LOCKING

2.2 HISTORITICAL BACKGROUND OF THE PROJECT

CHAPTER THREE

3.0 CONSTRUCTION

3.1 BLOCK DIAGRAM

3.2 CIRCUIT DIAGRAM

3.3 SYSTEM OPERATION

3.4 CIRCUIT DESCRIPTION

3.5 DESCRIPTION OF COMPONENTS USED

CHAPTER FOUR

4.0 RESULT ANALYSIS

4.1 CONSTRUCTION PROCEDURE AND TESTING

4.2 CASING AND PACKAGING

4.3 ASSEMBLING OF SECTIONS

4.4 TESTING OF SYSTEM OPERATION

4.5 INSTALLATION OF THE COMPLETED DESIGN

4.6 COST ANALYSIS

CHAPTER FIVE

5.0 CONCLUSION

5.1 RECOMMENDATION

5.2 BIBLIOGRAPH

  CHAPTER ONE

1.0                                                        INTRODUCTION

1.1                                           BACKGROUND OF THE STUDY

The security situation in many parts of the world today leaves much to be desired. In Nigeria particularly, the prevalence of armed robbers and other groups that constitute nuisance to the society has led to the loss of lives and properties worth millions of dollars. Many of the attacks that led to the loss have occurred in the homes or in guarded compounds and the attacks took place in spite of the existence of seemingly impregnable security gates that were designed to ward off intruders. The needs for electronically controlled gates that have superior security features to those operated manually thus exist and have been on the increase in recent times.

Many attempts have been made to design such gates with various types of security features. In the work by Shoewu and Baruwa a microprocessor was used to monitor two gates which sense the approach of a vehicle. The gates automatically open, wait for a specified time and then close. It is clear that the features of these gates do not provide adequate security since any vehicle can gain entry into the compound. A system that provides efficient gate access and an estate control to perform the job of the gate security guard is discussed in the work by Lau and Choo [4]. The main pitfall of this system is that it uses a telephone to identify visitors; the telephone can be used by anyone who approaches the gate. The development of a computer-controlled security gate system explained by Arulogun et al. allows privileged users to gain entry through a keyless door by using smart card authentication. It is true that smart cards can be stolen thus compromising the security of this system. An attacker only needs to acquire a valid smart card in order to gain entry through the door [6]. A low-cost private office access control system developed and discussed by Khan [7] permits a user with the correct password entered on a keypad to gain entry by controlling an electromagnetic door lock. The fact that passwords belonging to one individual can be learned by another without the owner’s permission is a major drawback of the system: the rogue can use the stolen password to gain entry into the system. Radio frequency identification (RFID) has been used in conjunction with microcontrollers to control gates to enable vehicles to pass through [8, 9]. Olatinwo and Shoewu [10] have described a system in which swing gates are controlled electronically using microcontrollers and infrared transmitters. This system is only required to close and open gates and has a very limited security feature. In the work done by Adewuyi et al. [11, 12] surveillance cameras are used to capture and recapture the face of the driver as well as vehicle plate numbers. These data are stored in a databank for future comparison with visitors who will only be able to gain entry into a compound through gates if the data match. The system has the disadvantage that users must have been properly documented to enable them pass through the gate.

The system that has been designed in this work uses microcontrollers and radio-frequency transmitter/receiver pair as major components. A microcontroller is programmed to decode a given sequence of keys that is entered on a keypad; the microcontroller commands a transmitter module to send out this code as signal at a given radio frequency. Upon reception of this RF signal by the receiver module, another microcontroller activates a driver circuitry to operate the gate automatically. Some advantages of the system over those described in [5], [6] and [7] include:

(i) It does not need close contact to control the gate; the control can be done from inside the car at a distance.

(ii) It operates as a stand-alone system and does not require a network provider for reception of signals.

(iii) The use of a keypad to generate the code necessary for the opening and closing of the gate enhances the security of the system since it requires very many trials by an intruder to succeed in breaking into the system.

(iv)The features of the system that are controlled by the firmware resident in the memory of the microcontrollers can be easily improved for future upgrade.

1.2                                                      STATEMENT OF PROBLEM

Security is a serious problem in Nigeria that calls for a proactive measure by all stakeholders and owners of residential buildings. Buildings in Nigeria (residential and organizational) do not have adequate security systems that monitor intruders and prevent access to sensitive les and products. !he increasing rate of crime” attacks by thieves” intruders and vandals despite all forms of security gadgets and locks still need the attention of researchers to find a permanent solution to the well being of lives and properties of individuals. To end this” this work uses the model of a keypad enabled access and seeks to further simplify and solve the problem of security in places where unauthorized access to organization materials and  files are to be prevented.

1.3                                        AIM/OBJECTIVE OF THE PROJECT

The main aim of this project is to develop an embedded system, which is used to verify and authenticate the authorized and person enter the room. This code is entered from a handheld unit. The security of the system is enhanced since the code is not easy to break and is only known to the operator.

Objectives include:

1. To design and create a password door locking system
2. To implement and show how to design a password looking system
3. To show stages involve in the design and implementation of password based system.

1.4                                         SIGNIFICANCE OF THE PROJECT

• 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 OF THE PROJECT

The main component in the circuit is the controller. In this project 4×3 keypad is used to enter the password. The password which is entered is compared with the predefined password.

If the entered password is correct then the system opens the door by rotating door motor and displays the status of door on LCD. If the password is wrong then door is remain closed and displays “pwd is wrong” on LCD.

1.7                                          LIMITATIONS OF THE PROJECT

·        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.

1.8                                               PURPOSE OF THE SYSTEM

The purpose of the system is to provide a user friendly security system for organizations and homes. This system is password based and allows only authorized person to access it with a password. It also has the provision of changing the password.

1.9                                          DEFINITION OF IMPORTANT TERMS

Keypad:  human interface numerical button to typing passwords

Microcontroller: a programmable unit that controls the whole section

Password: a set of security number or code use only by one person for security authentication

1.10                                                     METHODOLOGY

To achieve the aim and objectives of this work, the following are the steps involved:

1. Study of the previous work on the project so as to improve it efficiency.
2. Draw a block diagram.

• Test for continuity of components and devices,

1. programming of microcontroller
2. Design and calculation for the work was carried out.
3. Studying of various component used in circuit.

• Construct the whole
• Finally, the whole device was cased and final test was carried out.

1.11                                      PROJECT WORK ORGANIZATION

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 password based automatic door access control system. In this chapter, the background, significance, objective limitation and problem of password based security system were discussed.

Chapter two is on literature review of password based security system. 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.