Construction Of A Digital Combinational Lock System

Project and Seminar Material for Computer Engineering

Construction Of A Digital Combinational Lock System


Abstract


The 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 individual. To this end, we constructed a cheap and effective security system for buildings, cars, safes, doors and gates, so as to prevent unauthorized person from having access to ones properties through the use of codes, we therefore experiment the application of electronic devices as locks. However, a modular approach was employed in the construction in which the combination lock was divided into units and each unit constructed separately before being coupled to form a whole functional system. During the construction, we conducted five testscarried out with the first three combinations being four digits number, the next two tests being five digits. From the result obtained, combinations (2), (4), (7), (8) gave the correct output combination. The general operation of the system and performance is dependent on the key combinations. The overall system was constructed and tested and it works perfectly.


Table Of Content


Preliminary Page(s)

  • Title page
  • Declaration
  • Certification
  • Dedication
  • Acknowledgement
  • Abstract
  • Table of content

Chapter One

1.0 Introduction

  • 1.1 Principle of the system
  • 1.2 Objective of the study
  • 1.3 Statement of the problem
  • 1.4 Significant of the study
  • 1.5 Scope of study

Chapter Two

2.0 Literature Review

  • 2.1 historical development
  • 2.2 Types of locks
  • 2.3 Digital electronic combination locks
  • 2.4 A comparison of the past solutions
  • 2.5 An advancement of arguments to support the current choice

Chapter Three

3.0 Construction, Testing, and Discussion of Result

  • 3.1 Construction
  • 3.2 Circuit diagram
  • 3.3 The input unit
  • 3.4 Component selection
  • 3.5 Casing
  • 3.6 Testing

Chapter Four

4.0 Summary, Conclusion and Recommendation

  • 4.1 Summary
  • 4.2 Conclusion
  • 4.3 Recommendation
  • Reference

Chapter One


1.0 Introduction

Due to the advancement of science and technology throughout the world, there is a consequent increase in the rate and sophistication of crime. As a result, it is necessary to ensure security of oneself and one’s valuable belongings. Even with the use of mechanical locks, the crime rate still has increased due to the fact that these locks are easily broken. Consequently, there is a need for other types of locks -especially electronic ones.

This work is on construction of a digital electronic combination lock system with a keyboard to be mounted on the door for keying in the secret code. The code unit, which operates with a 9-switch (non- matrix) keyboard was designed to control an electromagnetic door lock with a four-digit code. Unlike other keyboard combination locks this lock is constructed in such a way that once any of the wrong keys is pressed, it resets automatically making it harder for an intruder to break into.

The increasing rate of crime, attacks by thieves, intruders, vandals etc., despite all forms of security gadgets and lock constitute the main factor that prompts the selection of this work. Materials used for the construction of the circuit were sourced and put together locally. Due to financial and time constrains a 4013 IC was used instead of programmable IC. As the limitation for the design, the 4013 IC is a data latch for data storage, the data stored cannot be changed in the case of code being compromised but the data can be changed in the programmable IC if there is any compromise.


1.1 Principle Of The System

The circuit is built around two 4013 dual D flip-flop (FF.)Each 4013 contains two D flip-flops. The four FF are connected to A, B, C and D pads. ABCD gives the 4 digits which must be keyed in in sequence for the relay to trigger. The five remaining digits may be connected to the RESETPAD. If one of these digits is keyed in during the ABCD sequence then the circuit will reset.

The circuit diagram and the block diagram of the 4013show how the lock works. The ABCD touch pads are connected to the Clock input pins 3 and 11 of each 4013.ABCD pads are normally tied low by the 4M7 resistors. Touching the pads of each keypad briefly pulls the input high and the state of the FF is altered. The output Q pins (1and 13) are wired so that when the correct sequence is keyed in then pin 13 of IC2 turns on the transistor. The reset keys are all wired to the Set pins (6 and 8) of each IC.

Here the correct code is2,4,7,8. That is, we will to touch 1 then 3 then 5 then 7 on the Remote Keypad for the relay to trigger. Touching any other number will make the system to reset the unit. On the main PCB connect Pad A to one of the pads on line1 using some of the hookup wire provided. Connect Pad Bto a pad on line 3, pad C to a pad on 5, Pad D to a pad on line 7. Now connect the five remaining numbers to the five pads on the RESET pad. Connect a 9V power supply.

The Combination Lock is now ready. It can switch a main powered device such as a light. The 4013 IC’s will work from 3V to 18V so the unit is quite flexible and can be adapted to many situations.


1.3 Objectives Of The Study

The main objectives for embarking on this project of construction of a digital combination lock system are;

  1. To construct a cheap and effective security system for buildings, cars, safes, doors and gates.
  2. To experiment the application of electronic devices as locks.
  3. To prevent unauthorized person from having access to ones properties through the use of codes.
  4. To raise awareness on the topic of security or access control.
  5. To utilize the available components to construct a working model of a digital combination lock system.
  6. To construct and test the designed system so as to see if it can perform as specified.

1.4 Statement Of The Problem

The 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 individual. Even with the use of mechanical locks, the crime rate still has increased due to the fact that these locks are easily broken. Consequently, there is a need for other types of locks especially electronic ones. To this end, we construct a cheap and effective security system for buildings, cars, safes, doors and gates, so as to prevent unauthorized person from having access to ones properties through the use of codes.


1.5 Significant Of The Study

Statistics from physical count of existing doors in used here in Mubi shows that only banks use digital locks, few homes (about 1 in 200,000) and few cars (about 1 in 100) use digital locks. Survey shows that the lock is not popular because it is expensive and it is complicated as few people can cram the access code. This work aims to make the digital combination lock cheaper, affordable and accessible for at least 70% for the people in Mubi Town.


1.6 Scope Of Study

This construction of digital combination lock is based on a flip flop action. We construct a cheap and effective security system for buildings, cars, safes, doors and gates, so as to prevent unauthorized person from having access to ones properties through the use of codes, we therefore experiment the application of electron


Chapter Four


4.0 Summary, Conclusion and Recommendation

4.1 Summary

For clarity and neatness of presentation, we outlined the article into five major sections. The First Section gives a general introduction of security systems and combinational lock. Section two gives presentation of related work. In Section Three, detail descriptions of the construction, the experimental results and discussion of the results and implementation procedures are presented. In Section Four. We concluded the work with some recommendations. Finally, references used in the manuscript are presented at the end of the paper.


4.2 Conclusion

The 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. As such, we constructed a cheap and effective security system for buildings, cars, safes, doors and gates, so as to prevent unauthorized person from having access to ones properties through the use of codes,

We therefore experiment the application of electronic devices as locks. The system works by combination lock which was divided into units and each unit constructed separately before being coupled into a single case, forming a whole functional system. No doubt, this will serve as a measure to prolong the life span of such electronic devices and also ensure adequate safety and required protection of lives and properties of individual. Most especially, to provide a means for restricting and disallowing unauthorized user from gaining access to a door or safe through key forge. The general operation of the system and performance is dependent on the key combinations. The overall system was constructed and tested and it works perfectly.


4.3 Recommendation

Having gone through the process of constructing a digital combination lock system, the following can be drawn from the experience;

  1. It is a worthwhile experiencing, having exposed the author to various aspects of construction and analysis.
  2. That digitally an almost secure system of locking can be achieved by a simple scheme.
  3. That the system is limited in use to Nigeria as the power situation is poor. It can lead to no access when access is needed.

We hereby recommend the following as a result of successful completion of this project.

  1. That companies and industries should encourage students by marketing their projects if properly done and concluded.
  2. To achieve the objective of the government and science on technology, there isneed for government to adequately finance all department that are technologically oriented.

Construction Of A Digital Combinational Lock System


Project Material Download

3,000 Naira


The complete material will be sent to you in just 2 steps.

Quick & Simple…


Step One Purchase

Make payment of ₦3,000: through USSD Transfer, Bank Mobile App, ATM Transfer, or POS Transfer to:

Access Bank PlcAccount No.: 0811003731
Name: Samphina Academy
Account Type: Current

Or Click Here to pay with Debit Card

FOR CLIENTS OUTSIDE NIGERIA:
Click Here to pay with Debit Card ($15)
GHANA – Make Payment of 60 GHS to MTN MoMo, 0553978005, Douglas Osabutey 

  PAY WITH CRYPTOCURRENCY


Step Two Purchase

Send the following details through Text Message or WhatsApp Messenger | +234-8143831497

  • Payment Details 
  • Email Address 
  • Construction Of A Digital Combinational Lock System

The complete material will be sent to your email address after receiving your payment information | T & C Apply


  Contact Our Help Desk


You may also like:

⚠️ Need a different topic? Perform a quick search



Get A Complete Business Plan For Any Business In Nigeria

Business Plan for Businesses in Nigeria

  Business Plans in Nigeria


Construction Of A Digital Combinational Lock System


Disclaimer

This research material “Construction Of A Digital Combinational Lock System” is for research purposes and should be used as a guide in developing your research project / seminar work. For no reason should you copy word for word (verbatim) as samphina.com.ng will not be liable for any who copied the material.

The aim of providing this material is to reduce the stress of moving from one school library to another all in the name of searching for research materials. This service is legal because, all institutions permit their students to read previous projects, books, articles or papers while developing their own works. According to Austin Kleon “All creative work builds on what came before”.

samphina.com.ng is only providing this material “Construction Of A Digital Combinational Lock System” as a reference for your research. The paper should be used as a guide or framework for your own paper. The contents of this paper should be able to help you in generating new ideas and thoughts for your own research. Use it as a guidance purpose only.


How to defend your research work


This is a general guide on how to defend your research work:

1. Prepare For Questions:

If you are preparing for questions that may be asked during your defense, then your answers will flow smoothly and effectively. This will prove your knowledge on the subject e.g “Construction Of A Digital Combinational Lock System“, and strengthening your argument. Ask friends and family, read your work for them to listen to your presentation, and write down questions. You may be lucky the panel will ask you those you have already prepared on.

2. Strong Summary:

Summarizing your chapters will help keep your audience focused because it is easy for a mind to drift, so providing summaries will ensure your panel will follow along, even if they lose focus for a brief moment. Visual aides, such as graphs and power-point presentations can be very helpful. If you are going to use these, make sure you will practice your presentation with them.

3. Be Confident in Your Research Work:

Not knowing your topic “Construction Of A Digital Combinational Lock System” inside out will cause you to struggle and ultimately fail with your defense. You need to know the subject from every angle to ensure you are fully prepared for any question that may come your way.

4. Conclusion:

Reinforce your findings to conclude your defense. The finale of your presentation should focus on proving the work that has been done. You may need to recap on what has changed and remained unchanged, if is necessary.

5 . Listen:

Before you get defensive or recite a particular answer, make sure you truly understand the question being asked. Being a good listener is an important quality, because providing an inaccurate or off-topic answer will also weaken the validity of your paper.

Samphina Academy

Samphina Academy is an Online Educational Resource Center that is aimed at providing students with quality information and materials to aid them in succeeding in their academic pursuit.