USER'S INSTRUCTIONS: The project work you are about to view is on "design and construction of a 4 way inter-communication system". Please, sit back and study the below research material carefully. This project topic "design and construction of a 4 way inter-communication system" have complete 5(five) Chapters. The complete Project Material/writeup include: Abstract + Introduction + etc + Literature Review + methodology + etc + Conclusion + Recommendation + References/Bibliography.Our aim of providing this "design and construction of a 4 way inter-communication system" project research material is to reduce the stress of moving from one school library to another all in the name of searching for "design and construction of a 4 way inter-communication system" research materials. We are not encouraging any form of plagiarism. This service is legal because, all institutions permit their students to read previous projects, books, articles or papers while developing their own works.

---

TITLE PAGE

 

BY

---
--/H2013/01430
DEPARTMENT OF ----
SCHOOL OF ---
INSTITUTE OF ---

---

APPROVAL PAGE

This is to certify that the research work, "design and construction of a 4 way inter-communication system" by ---, Reg. No. --/H2007/01430 submitted in partial fulfillment of the requirement award of a Higher National Diploma on --- has been approved.

By
---                                                     . ---
Supervisor                                                  Head of Department.
Signature……………….                           Signature……………….        

……………………………….
---
External Invigilator

---

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.

---

PROJECT DESCRIPTION: This work "design and construction of a 4 way inter-communication system" research material is a complete and well researched project material strictly for academic purposes, which has been approved by different Lecturers from different higher institutions. We made Preliminary pages, Abstract and Chapter one of "design and construction of a 4 way inter-communication system" visible for everyone, then the complete material on "design and construction of a 4 way inter-communication system" is to be ordered for. Happy viewing!!!

---

An intercom is a stand-alone voice communications system for use within a building or small collection of buildings, functioning independently of the public telephone network. Intercoms are generally mounted permanently in buildings and vehicles. Intercoms can incorporate connections to public address loudspeaker systems, walkie talkies, telephones. Four-way intercommunication system is nothing but the communication within four persons not close to one another. This does not mean we should categorize telephones, fax, teleprinters, telegraphs etc. an example of intercom system since they are used in communication between people. However, intercom involves short distance places. It is limited in electronics, offices, and hospitals. This intercom system is a four-way station type. This means that a person can communicate to the other at another station at his own convenient time. They call once another attention by the use of the tone generated by the use of tone generator.
Depress a button and the tone sounds, and the same switch is thrown to the intercom circuit thus they communicate.

TABLE OF CONTENTS
COVER PAGE
TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWELDGEMENT
ABSTRACT
CHAPTER ONE
INTRODUCTION
1.1      BACKGROUND OF THE PROJECT

• OBJECTIVE OF THE PROJECT
• PURPOSE OF THE PROJECT
• SIGNIFICANCE OF THE PROJECT
• PROBLEM AND LIMITATION OF THE PROJECT
• SCOPE OF THE PROJECT
• PROJECT ORGANISATION

CHAPTER TWO
LITERATURE REVIEW

• HISTORICAL BACKGROUND OF THE PROJECT
• REVIEW OF 4-WAY INTERCOM

CHAPTER THREE
SYSTEM DESIGN

• DESCRIPTION OF THE SYSTEM BUILDING BLOCK
• SYSTEM DESIGN SPECIFICATION
• BLOCK DIAGRAM OF THE SYSTEM
• DESCRIPTION OF THE OVERALL OPERATION OF THE SYSTEM
• LIST AND DESCRIPTION OF THE SYSTEM COMPONENTS
• COMPLETE CIRCUIT DIAGRAM

CHAPTER FOUR

• IMPLEMENTATION, TESTING AND RESULTS
• CONSTRUCTION PROCEDURE AND TESTING
• INSTALLATION OF THE COMPLET DESIGN 
• CASING AND PACKAGING
• ASSEMBLING OF SECTIONS
• TESTING OF SYSTEM OPERATION
• PROBLEM ENCOUNTERED

CHAPTER FIVE

• COST OF ANALYSIS
•  CONCLUSION
•  RECOMMENDATION
• REFERENCES

 

CHAPTER ONE
1.0                                                     INTRODUCTION
Electronic inter communication is the process of exchanging information between individuals over relatively long distance by the use of electronic system connected together by communication cables or the instrument cable or satellite links. A telephone system and an intercom system can be used to achieve intercommunication.
In the department of Electrical/Electronics Engineering, Institute of Management and Technology, Enugu, there exists the need for intercommunication between all the offices in the department so as to enable the smooth running of activities. Where by information and ideas are exchanged between the individuals concerned just at the press of a button. To achieve this kind of situation and economical means of electronic communication was considered.
Thus the intercom system was chosen so as interconnect the four offices earlier specified. Other offices can also be attached/ connected to the system as time goes on since the is room for modification. One may ask why the telephone system not considered since it is also another system of intercommunication. The telephone system is equally better but less appropriate since it requires a dedicated line form NITEL who charges bills accordingly. The intercom system only makes use of the physical communication cables interlinking the handsets concerned. Also, the telephone system requires PABX system (Private Automatic Box Exchange) for effective communication between the concerned telephone sets. The PABX is a high capacity telephone switching equipment that automatically connects a call to the desired route or extension number. It equally handles both external call and internal call. The telephone set or system is more appropriate for a whole educational complex or company. It is not appropriate to use the telephone for the connectivity of few offices as this under-utilizes the capacity of the PABX since they are designed to handle high capacity of lines. Bearing cost in mind, the 4-way intercom units is cheaper to construct when compared to the cost of procuring wireless intercom.
By embarking on the 4-way intercom, this believed that an efficient communication gadget or communication link between the offices shall be achieved.

1.2                                          AIM AND OBJECTIVES OF THE PROJECT
The main aim of this work is to design a device that can be used to communicate among four individuals in different parts of the home/office/industries and in the case of emergency. The objectives of the study are:

i. To build the system prototype

ii.To communicate among four individuals in different parts of the home/office/industries and in the case of emergency.

iii. To eliminate communication charges.

1.3                                      SIGNIFICANCE OF THE PROJECT
Yelling throughout the house or office can be an annoying and inconvenient way to communicate. Using an intercom system in your home or office can save time and provide a more effective communication channel. The home intercom system provides functions ranging from convenience to security. Conversations can be held between individuals in different parts of the home and in the case of injury or emergency.
1.4                                          PROBLEM OF THE PROJECT

• When using an intercom system, anyone in the room of the sender or recipient of the message can hear the conversation. Communication might have to be repeated if static or poor sound quality exists in the intercom.
• An intercom is an electronic communications system within a building or group of buildings. They are generally composed of fixed microphone/speaker units which connect to a central control panel.
• This circuit is based upon theoretical calculations and may require practical changes to be made while implementing the circuit in hardware.
• This is designed for loudspeakers with low range and hence cannot be used at large buildings.
• This requires a changeover switch.

1.4                                        LIMITATION OF THE PROJECT
There are other different types of intercom but this particular work is limited only to a 4-way type of intercom and the circuit is powered with 12v supply.

1.5                                       APPLICATION OF THE PROJECT
This device may find a place in pre-schools, old folk homes, boy scout/girl guide halls, churches, kids tree houses/fortresses, or maybe even more serious uses such as small offices, factories, workshops and many other applications.

1.6                             PURPOSE OF THE PROJECT
(1) The main purpose of this project is to construct a communication device that will allow communication of four different people within a particular domain, like offices homes, warehouse.
(2) To build a telephone that will transmit signal via a medium at no cost.
(3) To immensely help the engineering students understand the technology behind four way simple intercom and its practical development.

1.7                                    SCOPEOF PROJECT
The scope of this project work design of simple two way intercom system is to limited to the design, construction and test on a two station simple intercom system with specification that; I. The demodulator should operate with a minimum distortion while producing an adequate output
II. The small signal amplifier must provide an undistorted signal into the buffer amplifier to be able to drive a speaker of 8 ohms impedance.
III. A 12 volt d.c power supply is to be design and employed to power the simple intercom for operation at each station.
IV. Result shall fully be discussed while suggestions for further study made.

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 a four-way wired intercom. In this chapter, the background, significance, objective limitation and problem of a four-way wired intercom were discussed.
Chapter two is on literature review of a four-way wired intercom. 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.

CHAPTER FIVE
5.1                                                       CONCLUSION
An intercom is an independent voice communication system used within a building or a vehicle and is permanently mounted. Intercoms can be simplex where only one party talks and the other listens, or can be duplex where both the parties can talk and listen.
In this work, four way intercom circuit using four speakers and a changeover switch such that when one is used for listening, other is used for speaking and vice-versa.
This intercom circuit is a four way intercom circuit which is used for the dual purpose of sending as well as receiving signals. Three loudspeakers are used in conjunction with a DPDT switch such that when one of the speakers is used for talking, the other is used for listening. Ringing signal from a astable multivibrator is coupled to the collector of a transistor. This transistor amplifies the signal from the loudspeaker (used for listening). This audio signal is amplified and then again power of this signal is amplified to drive another speaker. Here a push pull amplifier is used as a power amplifier.

5.2                                   RECOMMENDATION
An intercom (intercommunication device), talkback or doorphone is a stand-alone voice communications system for use within a building or small collection of buildings, functioning independently of the public telephone network. Intercoms are generally mounted permanently in buildings and vehicles. Intercoms can incorporate connections to public address loudspeaker systems, walkie talkies, telephones, and to other intercom systems. Some intercom systems incorporate control of devices such as signal lights and door latches.
This project is designed to be used in homes, offices or industries, or wherever there is need for communication among people in the same home or building. And should be used and maintain by a qualified personnel.

 

---

CHAPTER TWO: The chapter one of this work has been displayed above. The complete chapter two of "design and construction of a 4 way inter-communication system" is also available. Order full work to download. Chapter two of "design and construction of a 4 way inter-communication system" consists of the literature review. In this chapter all the related work on "design and construction of a 4 way inter-communication system" was reviewed.

CHAPTER THREE: The complete chapter three of "design and construction of a 4 way inter-communication system" is available. Order full work to download. Chapter three of "design and construction of a 4 way inter-communication system" consists of the methodology. In this chapter all the method used in carrying out this work was discussed.

CHAPTER FOUR: The complete chapter four of "design and construction of a 4 way inter-communication system" is available. Order full work to download. Chapter four of "design and construction of a 4 way inter-communication system" consists of all the test conducted during the work and the result gotten after the whole work

CHAPTER FIVE: The complete chapter five of "design and construction of a 4 way inter-communication system" is available. Order full work to download. Chapter five of "design and construction of a 4 way inter-communication system" consist of conclusion, recommendation and references.

 

---

To "DOWNLOAD" the complete material on this particular topic above click "HERE"

Do you want our Bank Accounts? please click HERE

To view other related topics click HERE

To "SUMMIT" new topic(s), develop a new topic OR you did not see your topic on our site but want to confirm the availiability of your topic click HERE

Do you want us to research your new topic? if yes, click "HERE"

Do you have any question concerning our post/services? click HERE for answers to your questions

---

For more information contact us through any of the following means:

Mobile No :+2348146561114 or +2347015391124 [Mr. Innocent]

Email address :engr4project@gmail.com

Watsapp No :+2348146561114

---

COUNTRIES THAT FOUND OUR SERVICES USEFUL

Australia, Botswana, Canada, Europe, Ghana, Ireland, India, Kenya, Liberia, Malaysia, Namibia, New Zealand, Nigeria, Pakistan, Philippines, Singapore, Sierra Leone, South Africa, Uganda, United States, United Kindom, Zambia, Zimbabwe, etc
Support: +234 8146561114 or +2347015391124

Watsapp No :+2348146561114

Email Address :engr4project@gmail.com

---

FOLLOW / VISIT US VIA: