DESIGN AND CONSTRUCTION OF NUMERIC CONTROLLED DOOR LOCKING SYSTEM
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CHAPTER ONE
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 can be a motor or a lamp or any other mechanical/electrical load (Gaikwad, 2014). Here we develop an electronic code lock system using 4081 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 Objective of the study
The objective of this work is to design a security door device that can be use to control a door when the right password is pressed using a keypad.
Specific objectives of the study are:
This project provides security
Power consumption is less
Used commonly available components
Project is simple and easy
1.3 Applications of the study
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.
1.4 Limitation of the study
Limitations of numeric Door Lock System 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.