Home / Computer Engineering / The design and construction of mini radio broadcast transmitter and audio console using frequency modulation (fm) with power rating of 1 watt

The design and construction of mini radio broadcast transmitter and audio console using frequency modulation (fm) with power rating of 1 watt

 

Table Of Contents


<p> </p><p>Title page</p><p>Approval page</p><p>Declaration </p><p>Dedication</p><p>Acknowledgement</p><p>Abstract</p><p>Table of content</p><p>List of diagram/figures</p><p>Introduction</p><p><b>

Chapter 1

</b></p><p><b>TRANSMITTER FUNDAMENTALS AND TYPES OF MODULATION</b></p><p>1.1 Transmitters fundamental</p><p>1.2 Modulations (analog and digital)</p><p>1.3 Amplitude modulation</p><p>1.4 Frequency modulation</p><p>1.5 Method of fm</p><p>1.6 Modulation overview</p><p>1.61 &nbsp; Basic reactance modulator</p><p>1.62 Theory of reactance modulator </p><p>1.70 Types of reactance modulator</p><p>1.7.1 Varacto diode modulator</p><p><b>

Chapter 2

</b></p><p><b>AMPLIFIER EXPLANATIONS</b></p><p>2.10 Amplifier explanations</p><p>2.20 Class of amplifier</p><p>2.21 Class of amplifier</p><p>2.22 Class B amplifier </p><p>2.23 Class AB amplifier</p><p>2.24 Class c amplifier</p><p>2.30 Oscillators</p><p>2.31 Types of oscillators </p><p><b>

Chapter 3

.0 </b></p><p><b>TRANSMISSION LINE</b></p><p>3.10 FUNDAMENTALS</p><p>3.30 Types of transmission lines</p><p>3.31 Rectangular wave guide</p><p>3.32 Circular wave guide </p><p>3.33 Ridge Wave guide</p><p>3.34 Optical fiber</p><p><b>

Chapter 4

</b></p><p><b>POWER SUPPLY</b></p><p>4.1 Stages of power supply</p><p>4.2 &nbsp;Audio console power supply</p><p>4.3 Transmitter power supply design</p><p><b>

Chapter 5

</b></p><p><b>AUDIO CONSOLE UNIT</b></p><p>5.1 Audio console transducer</p><p>5.2 Audio console pre-amp stage</p><p>5.3 Audio console power amp stage</p><p>5.4 Audio console control/mixer</p><p>5.5 The operation of the audio console</p><p><b>CHAPTER 6 </b></p><p><b>TRANSMITTER AND ANTENNA DESIGN</b></p><p>6.1 Oscillator stage design for transmitter</p><p>6.2 Buffer/power amplifier design</p><p>6.3 Tank circuit design</p><p>6.4 Antenna design</p><p>6.41 Types of antenna and application</p><p>6.42 &nbsp; &nbsp;Antenna matching network</p><p>6.43 &nbsp; &nbsp;Antenna design</p><p><b>CHAPTER 7 </b></p><p><b>COMPONENT DESCRIPTION AND CONSTRUCTION </b></p><p>7.10 &nbsp; &nbsp;LM 386-power amplifier</p><p>7.11 Capacitor</p><p>7.12 Transistor</p><p>7.2 &nbsp; Specification</p><p>7.3 Construction and soldering</p><p>7.4 Precautions taken during soldering</p><p>7.5 Troubleshooting</p><p>7.6 Transmitter strip board</p><p>7.7 Audio console strip board</p><p><b>RECOMMENDATION</b></p><p><b>CONCLUSION</b></p><p><b>REFERENCE:</b></p><p><b>LIST OF FIGURES AND DIAGRAM</b></p><p>Fig 1.4 &nbsp;Information signal</p><p>Fig 1.62 &nbsp;Reactance modulator circuit</p><p>Fig 1.7 &nbsp;Reactance modulator elements</p><p>Fig 1.7 Diagram of transistor reactance modulator</p><p>Fig 1.8 Varactor diode modulator</p><p>Fig 2.1 &nbsp;Amplifier configuration</p><p>Fig 2.21 Class a wave form representation</p><p>Fig 2.22 Voltage current characteristic of class b amp</p><p>Fig 2.3 Block diagram of an oscillator</p><p>Fig 3.2 Balanced line</p><p>Fig 3.22 Unbalanced wire – line</p><p>Fig 3.3 &nbsp;Method of wave propagation in a waveguide</p><p>Fig 3.31 Te10 mode in a rectangular waveguide</p><p>Fig 3.32 &nbsp;Circular waveguide</p><p>Fig 3.33 &nbsp;Rectangular waveguide/ ridge</p><p>Fig 3.4 Optical fiber cable</p><p>Fig 4.1 Power supply block diagram</p><p>Fig 4.2 Audio console power supply regulator</p><p>Fig 4.3 Transmitter power supply </p><p>Fig 5.2 &nbsp;Audio console pre-amp</p><p>Fig 5.3 Audio console power amp</p><p>Fig 5.4 Audio console control/ mixer</p><p>Fig 6.1 Oscillator stage</p><p>Fig 6.2 Buffer amp/power amp</p><p>Fig 6.3 Tank circuit</p><p>Fig 6.42 Antenna matching network</p><p>Fig 7.1 LM 386 (power amp)</p><p>Fig 7.11 Capacitor</p><p>Fig 7.12 Transistor</p><p>Bill of quantity </p><p>Block diagram of audio console</p><p>Block diagram of transmitter</p><p>Audio console schematic</p><p>Transmitter schematic</p><p>Transmitter casing </p><p>Audio console casing</p> <br><p></p>

Project Abstract

<p> </p><p>The early transmitter for radio broadcasting is so big and bulky that they do occupy numerous spaces. The circuitries are mainly designed with valves, which are big in sizes.</p><p> With the advent of semiconductor materials such as transistors electronic equipment are now becoming miniaturized such that small transmitters are now becoming handy and compact.</p><p> In line with this we choose to design a complete radio broadcasting equipment tat is compact and existence of semiconductor materials.</p><p> The system units are of two categories namely audio console for the processing and mixing of musicals is basically a condenser microphone. </p><p> The transmitter unit is where the center frequency is provided. All these were designed to be in compact and small manner. This project is aimed at serving a community using a small and compact radio broadcasting equipment with a power watt of 1 watt a community of 1 kilometer in radius should be covered comfortable and the audio production very clear unlike the common noisy FM microphone project.</p> <br><p></p>

Project Overview

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