Design And Construction Of Electronic Door Bell

ABSTRACT
An electronic bell is a signaling device typically placed near an entry door to a building. When a visitor presses a button the bell rings inside the building, alerting the occupant to the presence of the visitor. Modern house bells are electric — they are actuated by an electric switch.

In most wired systems, a button on the outside next to the door, located around the height of the doorknob, activates a signaling device (usually a chime, bell, or buzzer) inside the building. Pressing the electronic bell button, a single-pole, single-throw (SPST) pushbutton switch momentarily closes the doorbell circuit. The function of the indicator is to indicate when someone is pressing the button.

TABLE OF CONTENTS

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     LIMITATION OF THE PROJECT

1.4     APPLICATION OF THE PROJECT

1.5     SCOPE OF THE PROJECT

1.6     PROJECT ORGANIZATION

CHAPTER TWO

2.0     LITERATURE REVIEW

2.1     REVIEW OF DOORBELL

2.2   HISTORICAL BACKGROUND OF THE PROJECT

CHAPTER THREE

3.0     CONSTRUCTION

3.1     SYSTEM BLOCK DIAGRAM

3.2      SYSTEM OPERATION

3.3       CIRCUIT DESCRIPTION

3.4     DESCRIPTION OF COMPONENTS USED

CHAPTER FOUR

RESULT ANALYSIS

4.0     CONSTRUCTION PROCEDURE AND TESTING

4.1     CASING AND PACKAGING

4.2     ASSEMBLING OF SECTIONS

4.3     TESTING OF SYSTEM OPERATION

4.4      COST ANALYSIS

CHAPTER FIVE

5.0     CONCLUSION

5.1     RECOMMENDATION

5.2     REFERENCES

 CHAPTER ONE

1.1                                          INTRODUCTION

To cleanly understand the wood information technology and communication which is the life blood of all human activities the assimilation of communication technology is of great important. The development of communication technology in any nation makers communication technology easy and pleasant. And one of basic building block of a communication system is the house bell indicating which serves as inter-call light to ensure proper communication within an officer or domestic.

An electronic bell can be defined as dunce which can be use to alert signal for indicating of problem in alarm signals.

The device is classified according to were types, mode of operation and the application there are numerous types of alarming signals but for the purpose of this project an electric bell with light indicator is considered.

This device receives its input signal form an electrical device known as bell push. That was connected at the wing board Via joint box. The signal (current) passes through the wire and fed into the bell which causes the bell to ring in order to alert the receiver.

Furthermore, the objective of this electronic bell is to provide a cheap and continent means of communication between two or more people in the same premises.

The major different between inter- communication system using telephone and electric bell is that the signal is transmitted by the call indicator system in place of speech as in the case of the telephony.

In most wired systems, a button on the outside next to the door, located around the height of the doorknob, activates a signaling device (usually a chime, bell, or buzzer) inside the building. Pressing the electronic bell button, a single-pole, single-throw (SPST) pushbutton switch momentarily closes the doorbell circuit. One terminal of this button is wired to a terminal on a transformer. A doorbell transformer steps down the 240-volt AC electrical power to a lower voltage, typically 10 to 20 volts.

1.2                              OBJECTIVE OF THE PROJECT

The objective of this electronic bell is to design a device that will provide a cheap and continent means of communication between two or more people in the same premises. In electric bell, the signal is transmitted by the call indicator system is to
1.3                              SIGNIFICANCE OF THE PROJECT

Electronic bell Provide a cheap and continent means of communication between two or more people in the same premises. It can also be used in offices or industries as a mean alerting of someone.

1.4                                           LIMITATION OF THE PROJECT

This project operates with power supply, which means that the system will stop working whenever mains power supply fails.

1.3                              SIGNIFICANCE OF THE STUDY

Electronic bell Provide a cheap and continent means of communication between two or more people in the same premises. It can also be used in offices or industries as a mean alerting of someone.

1.4                                  SCOPE OF THE PROJECT

Electronic bell components include the outdoor button, wiring, battery, buzzer or speaker. The electric doorbell functions when the door button, outside the home, is pushed, causing electrical current to flow into a circuit. When a visitor came to the house and want to inform the occupant of the house of his presences, all he need to do is to press the switch button. Due to the switch connection to the circuit the wire ‘w’ develops resistance and gets conducted because of battery connector and also to the circuit.

1.5                                          APPLICATION OF THE PROJECT

This Electronic bell is widely used:

1. at railroad crossings,
2. in telephones,
3. fire and burglar alarms,
4. as school bells, doorbells,
5. and alarms in industrial plants

1.6                          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 electronics bell. In this chapter, the background, significance, objective, application, scope, limitation and problem of electronics bell box were discussed.

Chapter two is on literature review of an electronics bell. 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.