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Design And Construction Of 20watts Wireless Public Address System
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1.3 JUSTIFICATION
Over the ages, science and
technology has been developing with new inventions in various fields;
including the increase in modifications on existing technology all
gearing towards improving effectiveness and reliability of equipment and
achieving to a great degree miniaturization and optimal cost.
This
project is backed by my interest in the area of electronics and
communication, and having been groomed to a great extent with
introductions into the various fields of electrical and electronics
engineering, with the knowledge in principles of telecommunications,
telecommunication engineering,
basic electronics and lab practice. I
chose to combine basic electronics and lab practice. I chose to combine
all these ideas in embarking on this project to develop
a special system that utilizes all the above stated knowledge in one system; “the public address systemâ€.
This
system makes use of radio communication system, it utilizes radio
frequency to achieve all its set objectives, like data communication in
the operation of wireless communication between the transmitter and the
receiver.
This system is intended to provide a fast and reliable
means of communication in small venues such as school auditoriums,
churches, and small bars.
1.4 SCOPE OF THE PROJECT
This system is
for public address; it has an estimated power rating of 20watts. For
power supplies, it uses a 220/12Vac transformer for the receiver,
amplifier and loudspeaker units. It has a power On/Off button with
volume control.
1.5 SYSTEM BLOCK DIAGRAM
Fig 3: Block diagram of a public address system
The
system is made up of the transmitter which is incorporated in the
microphone; and the receiver unit, the tone control and mixer unit, the
audio amplifier unit and the loudspeaker.
1.6 PROJECT WORK ORGANISATION
The
various stages involved in the development of this project have been
properly put into six chapters to enhance comprehensive and concise
reading. In this project thesis, the project is organized sequentially
as follows:
Table 1 : Project work organization
INTRODUCTION
LITERATURE REVIEW
SYSTEM DESCRIPTION AND IMPLEMENTATION
CIRCUIT DESIGN AND ANALYSIS
CONSTRUCTION AND TESTING
CONCLUSION/RECOMMENDATION
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ABSRACT - [ Total Page(s): 1 ]It has become inevitable that there would be communication and due to the inherent limitation of the human voice, the public address system came to being. A public address or “P.A SYSTEM†is an electronic amplification system with a mixer ,amplifier and loudspeakers, used to reinforce a given sound , e.g a person making a speech, pre-recorded music ,or message and distributing the sound throughout a venue . The voice signal is passed through a microphone , which converts the sound en ... Continue reading---
