Volume 1 Issue 12 October 1999.pdf

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Copyright © 1999 Wimborne Publishing Ltd and
Maxfield & Montrose Interactive Inc
EPE Online, Febuary 1999 - www.epemag.com - XXX
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12 issues od EPE ONline(JUL-1999 through JUN-2000)
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Copyright © 1998 Wimborne Publishing Ltd and
Maxfield & Montrose Interactive Inc
EPE Online,October 1999- www.epemag.com
Copyright
©
1999, Wimborne Publishing Ltd
and Maxfield & Montrose Interactive Inc.,
PO Box 857, Madison, Alabama 35758, USA
All rights reserved.
:$51,1*
The materials and works contained within
EPE Online
— which are made available
by Wimborne Publishing Ltd and Maxfield & Montrose Interactive Inc — are
copyrighted. You are permitted to download locally these materials and works and to
make one (1) hard copy of such materials and works for your personal use. International
copyright laws, however, prohibit any further copying or reproduction of such materials
and works, or any republication of any kind.
Maxfield & Montrose Interactive Inc and Wimborne Publishing Ltd have used their
best efforts in preparing these materials and works. However, Maxfield & Montrose
Interactive Inc and Wimborne Publishing Ltd make no warranties of any kind, expressed
or implied, with regard to the documentation or data contained herein, and specifically
disclaim, without limitation, any implied warranties of merchantability and fitness for a
particular purpose. Because of possible variances in the quality and condition of
materials and workmanship used by readers,
EPE Online,
its publishers and agents
disclaim any responsibility for the safe and proper functioning of reader-constructed
projects based on or from information published in these materials and works.
In no event shall Maxfield & Montrose Interactive Inc or Wimborne Publishing Ltd be
responsible or liable for any loss of profit or any other commercial damages, including
but not limited to special, incidental, consequential, or any other damages in connection
with or arising out of furnishing, performance, or use of these materials and works.
Copyright © 1999 Wimborne Publishing Ltd and
Maxfield & Montrose Interactive Inc
EPE Online, October 1999 - www.epemag.com - 936
PROJECTS AND CIRCUITS
INTERIOR LAMP DELAY
-
by Steve Challis
Don’t you just hate being pluged into darkness when the car door shuts?
Here’s a solution! Plus lights on alarm and battery saver
940
946
950
958
MAINS CABLE DETECTOR
-
by Robert Penfold
This simple Starter Project detects mains cables by sensing their “hum”
QWL LOUDSPEAKER SYSTEM -
by John Dix
Enjoy superb hi-fi sound at a fraction of the cost of an equivalent commercial
speaker system
INGENUITY UNLIMITED
-
hosted by Alan Winstanley
Shoestring MW Radio ; Auto Supply Crowbar
MICRO POWER SUPPLY
-
by Andy Flind
Supplies a well-regulated +/-5V even if your battery’s nearly flat!
960
SERIES AND FEATURES
INTERFACE
by Robert Penfold
More on serial interfacing your PC
986
965
974
963
990
996
PRACTICAL OSCILLATOR DESIGNS - 4 Negative resistance oscillators
Working examples and circuit info for hands-on constructors.
PIC16F87x MINI TUTORIAL
-
by John Becker
Practical guidance on using the new PIC microcontroller family.
NEW TECHNOLOGY UPDATE
-
by Ian Poole
Sensing electron spin-directions increases hard disk densities
CIRCUIT SURGERY
-
by Alan Winstanley and Ian Bell
Low Voltage 555; Digital Panel Meters; Sound Levels and Decibels
NET WORK - THE INTERNET PAGE
surfed by Alan Winstanley
Explore New Options (MSIE 5.0); 1984 And All That; Looking Ahead
REGULARS AND SERVICES
EDITORIAL
NEWS
-
Barry Fox
highlights technology’s leading edge. Plus everyday
news from the world of electronics.
addresses general points arising.
The essential guide to component buying
938
998
1004
1002
READOUT
-
John Becker
for
EPE Online
projects.
SHOPTALK -
with David Barrington
Copyright © 1999 Wimborne Publishing Ltd and
Maxfield & Montrose Interactive Inc
EPE Online, February 1999 - -www.epemag.com --XXX
EPE Online, October 1999 www.epemag.com 937
TIME FLIES LIKE A FRUITBAT…
It was only as we were putting this October 1999 issue to bed that we realized that this was
the twelfth issue of
EPE Online
– that’s right, we’ve now been up and running for an entire year!
To be honest we don’t know where the time has gone – it seems like only a couple of weeks
ago that we started working on our first issue (November 1998). Our personal theory is that
everyone is given 24 hours-worth of “time particles” to get them through each day, but that
some swine is absconding with half of ours.
If this is the case, then someone out there is basking in the glow of having 36 hours to play
with in each day, while we’re left desperately trying to get everything done in only 12 hours! Of
course this may not be the best theory in the world, but it would certainly explain the way things
seem to work around here …. but we digress …
INNOVATIONS
Since we started
EPE Online,
you will have noticed that we are constantly evolving and
improving our web site and our web-delivered capabilities. Well following requests from a
number of readers, this month we feature something new – from now on the
EPE Online Library
will contain postscript files of the copper foil master patterns for our printed circuit boards, which
will be tremendously useful for those of you who like to make your own circuit boards.
KONRAD ZUSE
Konrad Zuse was one of the all-time greats in early computing, yet thus far he has remained
largely unknown outside his native Germany. At the end of this month, there is going to be a
Konrad Zuse Colloquium & Z23 Dedication in Mountain View, California. At the same time,
Konrad Zuse is going to be made a Fellow of the Computer Museum History Center.
For the last two months we have been working with Konrad’s eldest son – Horst Zuse – to
bring you a world-exclusive article on Konrad Zuse's life and work. This article, which can be
found at the
EPE Online
web site at
www.epemag.com
features many hitherto unpublished
photographs and images from Horst’s private collection. Now be honest, you don’t get this sort
of treat with any other magazine, do you?
Copyright © 1999 Wimborne Publishing Ltd and
Maxfield & Montrose Interactive Inc
EPE Online, October 1999 - -www.epemag.com - -XXX
EPE Online, October 1999 www.epemag.com 938

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