FM Transmitter Oscillator

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FM Transmitter/ Oscillator

• By Isaiah Lucas
• Michael Chrisco

Mesamunefire_at_aol.com Michael
Ilucas_at_yahoo.com Isaiah
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Table of Contents

• Abstract
• Introduction
• Motivation
• Device Integration
• Experimentation
• Pictures of Devices Used
• Results and Analysis
• Conclusions
• References
• Demonstration
• Questions

3
Abstract

• FM transmitter circuit built
• Background information and how the circuit works
  will be explained
• Explanation about the experimentation process
  and results
• Conclusions and questions on the FM circuit

4
Introduction

• For the last 50 years, FM radio popular with
  people for radio stations.
• In order to FM radio to work, need transmitter
  and receiver.

5
Motivation

• Desire to make a fully functional circuit and
  soldiering experience
• Connect to computer and have whole house have
  custom music.

6
Device Integration

• Putting FM transmitter together
• Circuit diagram Circuit board

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Device Integration continued

• Completed circuit

8
Experimentation

• Two experiments were made with circuit
• Three different devices were used to create
  inputs for circuit
• Used two different radios at different places

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Pictures of Devices Used

• Piezo speaker Larger speaker

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Pictures continued

• Laptop
• Laptop connection

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Results and Analysis

• The piezo speaker too small of signal to be of
  use to circuit.
• The larger speaker had stronger signal but lacked
  clarity in sound.
• Laptop connection had strong signal and clarity
  in sound.
• In all three experiments, both radios picked up
  the signal at near equal clarity.

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Results continued

• Problems that arose
• After about a period of 5 minutes, wires to
  battery burnt out twice.

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Conclusion

• Radio circuit is great at using other electronic
  source for input.
• Problems with speakers and if used with circuit,
  need to be high quality.
• Cant use the circuit for more than 5 minutes or
  risk damaging the power supply wires.

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References

• http//radio.about.com/od/unitedstatesradiohistory
  /United_States_Radio_History.htm
• http//whatis.techtarget.com/definition/0,sid9_gci
  214073,00.html
• http//www.home.agilent.com/USeng/nav/-536902257.0
  /pc.html?CSGroupRELATED
• http//members.ispwest.com/sheldon/MAY-1.jpg
• http//www.ebaumsworld.com
• Jenson, J. A User Guide to Engineering. Pearson/
  Prentice Hall., Upper Saddle, NJ, 2006

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Demonstration

• We will now demonstrate the FM transmitter using
  a video and the laptop.

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Questions