Telephone Projects for the Evil Genius

385 Pages·2009·6.07 MB·english

by  Thomas Petruzzellis

Evil Genius Series
Bike, Scooter, and Chopper Projects for the Evil Genius
Bionics for the Evil Genius: 25 Build-It-Yourself Projects
Electronic Circuits for the Evil Genius: 57 Lessons with Projects
Electronic Gadgets for the Evil Genius: 28 Build-It-Yourself Projects
Electronic Games for the Evil Genius
Electronic Sensors for the Evil Genius: 54 Electrifying Projects
50 Awesome Auto Projects for the Evil Genius
50 Model Rocket Projects for the Evil Genius
51 High-Tech Practical Jokes for the Evil Genius
Fuel Cell Projects for the Evil Genius
Mechatronics for the Evil Genius: 25 Build-It-Yourself Projects
MORE Electronic Gadgets for the Evil Genius: 40 NEW Build-It-Yourself Projects
101 Outer Space Projects for the Evil Genius
101 Spy Gadgets for the Evil Genius
123 PIC® Microcontroller Experiments for the Evil Genius
123 Robotics Experiments for the Evil Genius
PC Mods for the Evil Genius
Programming Video Games for the Evil Genius
Solar Energy Projects for the Evil Genius
Telephone Projects for the Evil Genius
22 Radio and Receiver Projects for the Evil Genius
25 Home Automation Projects for the Evil Genius
Telephone Projects
for the
Evil Genius
TOM PETRUZZELLIS
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DOI: 10.1036/0071548440
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This book is dedicated to my first grandson Giovanni.
May he dream big dreams and see them realized.
Wishing him a long, interesting, and enjoyable life!
About the Author
Tom Petruzzellis is an electronics engineer with 30 years’experience, currently working with the geophysical
field equipment department at the State University of New York-Binghamton. He has written extensively for
industry publications such as Electronics Now and Modern Electronics, and is the author of numerous
McGraw-Hill bestsellers, including Electronics Sensors for the Evil Genius.
vi
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Contents
Introduction xi Phone Line-in-Use Relay 131
Controller
Acknowledgments xiv
Single Phone Line Status Light 134
Two-Line Phone Status Indicator 137
1 Telephone History 1
Smart Phone Light 141
2 How the Telephone Works 6 Telephone Line Vigilant 145
3 Identifying Electronic Components 13 15 Telephone and Phone Line Testers 150
Simple Telephone Line Tester 151
4 Reading Schematics 20
Off-Line Telephone Tester 153
5 Electronic Parts Installation 28 Telephone Line Tester 157
and Soldering Telephone Line Simulator 159
6 Telephone Privacy Guard 39 16 FM Telephone Transmitter 166
7 Modem Protector 42 17 Telephone Project 173
8 Telephone Amplifiers and Projects 46 18 Talking/Musical Telephone Ringer 187
Magnetic Phone Pickup 47
19 Telephone Tollsaver 195
Direct Connect 52
20 Infinity Bug/Transmitter Project 204
9 Phone Recorder Switch Project 55
21 Radio Phone Patch 213
10 Telephone Conferencer Unit 61
22 Telephone Phone Intercom 221
11 The Frustrator 67
23 Speaker-Phone Project 231
12 Hold Circuits and Projects 75
Telephone Hold and Line-in-Use 78 24 Telephone Scrambler 241
Basic Music-on-Hold 80
25 Telephone Tattletale 251
Universal Hold Circuit 84
26 DTMF Telephone Controller 261
Automatic Music-on-Hold 89
Project
13 Telephone Ringer Projects 98
27 The BASIC STAMP Microcontroller 275
Silent Cellular Phone Ringer 100
Remote Telephone Ringer 105 28 DTMF Touch-Tone Generator/Decoder 282
Telephone Ring Detector 111 Display
Wireless Telephone Ringer 117
29 Caller-ID/Blocker Project 294
Telephone Ring Generator 126
30 Page-Alert 311
14 Phone Line Status Circuits and 121
Alarm Switch/Sensor Module 321
Projects
Temperature/Voltage Level 323
Phone In-Use Indicator 124
Module
Cut Phone Line Detector 128
vii
31 Tele-Alert Project 328 Appendix: Electronic Parts Suppliers 364
Motion Module 339
Index 367
Listen-in Module 344
32 Remote Temperature Monitor 348
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Introduction
Since its inception in 1876, the telephone has This book will appeal to both electronics neophytes
captured the imagination of people around the and seasoned circuit builders of all ages.
world. From its simple origins, the telephone has
Once you open up this book you will realize that
evolved from the humble device it once was to the
the common telephone and telephone lines can be
modern cell phone or satellite phone. The
used in a variety of ways to support many different
telephone has fundamentally and instantaneously
types of projects that you perhaps never knew
changed the human race’s ability to communicate
existed. You will explore the basics of the
over long distances. Today, not only can we
telephone, and learn how to build an electronic
communicate via the human voice but we can
telephone and a telephone modem/line protector,
rapidly send scientific and health data, pictures,
as well as remote ringer circuits, line use
and information between any two people or
indicators, a telephone intercom, speaker-phone, a
organizations on earth in just a few seconds by
telephone transmitter, and a telephone listening
picking up the phone and dialing the party at the
device, just to name a few projects.
other end. The development of the telephone has
The book is broken down into 32 chapters.
progressed at such a rapid rate in the last 50 years
Chapter 1 discusses a bit of telephone history,
alone that it is truly amazing what can be done
while Chapter 2 describes how a conventional
with the telephone in our modern lives;
telephone functions. Chapter 3 shows readers how
and it is now mostly taken for granted.
to identify components; this chapter is particularly
Our new book titled Telephone Projects for the
useful for newcomers to electronics or for younger
Evil Genius is a fun and informative project book
readers. Chapter 4 delves into reading schematics,
which we hope will spark your imagination and
and you will learn the difference between a
creative abilities. If you are interested in learning
schematic and a pictorial diagram, as well as
about the history of the telephone, and how a
how components are connected and work with
telephone operates, or if you want to know how a
one another. Next, Chapter 5 shows the reader
telephone remote control functions and how to
how to install components on circuit boards and
remotely control things around your home or
how to solder. Every electronic hobbyist should
office, or perhaps, if you would like to know how
know how to solder well before attempting
to build a remote telephone listening device, then
electronic projects.
you will definitely want to read on.
Chapter 6 begins the actual project section of the
This telephone project book was written for the
book and presents a device called the privacy guard.
general electronics enthusiast as well as for
The privacy guard prevents other persons around
telephone enthusiasts and experimenters alike.
the house from listening to your telephonecalls.
ix
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