PP-2001-11.pdf

(8425 KB) Pobierz
ELECTRONIC CIRCUITS, ROBOTICS,
INTERNET
TECHNOLOGY
.poptronics.com
MEP
2001
NOVEMBER
nit
merty
Popular Electronics
ancifiectropiic
-±11-Ji_31
I
in
%46
g
See
Cfrcti
'9e
57
it
TCUIT
IrD
±_r)
PUOI
CA ION
Patch
youtte
one
in19
the
Net
with
the
Watcher
onstruct thi
chkintesito
-
1
fdryour
benc
Letters
Regarding
Pyramids
Probing High-Voltages
Safely
IR-Sensor
Equipped
Robots
High-Quality
Printers
The
Origins
of
Stealth
Technology
#EXE1Offi-.1
f**CI-R
T
LOT
ff1:7-1312
P
ft2113160HP1SSIED007#
$4.99
U.S.
.50
CA
ROBERT DANN
S515
RED
RAIN
PATH
PIHY
P238
2002
COLutlarH.
21048-2C73
Bring
A
Robot
Available
Exclusively
at:
www.bn.com
To
112,1
BARNES
&NOBLE
BOOKSELLERS
BUILD
YOUR
MID
ROBOT
KIT
learn
Pre
Id
BMW
RN Program
rear
Owe
i,r.te.Contreltd
Beb1
pod M.
Drwemmd
hr
iBStroctiun lar
PLUS
cola
1re9'emme9l
41.14
ß
s
Iactums
CO
®R
ROMII
October
2001
ISBN
0
-07- 138787
-0
$59.95
Electronics
Build
Your Own
Robot
Kit
TAB
Created by Myke
Predko
and
Ben
Wirz
This
incredibly simple -to -build robot will provide
you
with hours
of
enjoyment
and
a
great platform
on
which
to develop more
sophisticated applica-
tions.
The
9
-volt
battery powered
robot
is
driven
by dual
electric
motors
and
controlled
by
a
Microchip
PIC16C505
PlCmicro Microcontroller. With
two light sensors
and
wire
"feelers" the
robot
is
pre
-programmed with
the
following
"behaviors"
built
-in:
Random Movement, change
forward direction
when
an
object
is
encountered
"Photovore"
Seek
out light
"Photophobe"
Avoid Light
Follow Wall
"Maze
Solver"
-
-
-
Along with its basic
control,
the
robot
can
be
also
be
controlled
by
the
infrared remote control included
in
the kit.
With
the
addition
of
a
BASIC
STAMP BS2
Microcontroller
(not included) customized applications
can
easily
be
built.
The
software
code
for
the Basic Stamp
applications
is
included
on an
accompanying
CD
-ROM along
with assembly instructions
and
schematic
and
block diagrams.
99
inexpensive robotics
projects...
The
Robot
Builder's
Bonanza, 2E
Gordon McComb
This updated bestseller features fascinating field- tested
projects and modular organization to
make it easy
to invent
and
build
your own
robots.
You
will find this heavily illus-
trated guide provides everything required to get started.
2001
753
pages
ISBN 0-
07- 136296 -7
microcontrollers...
PIC
Microcontroller
Project
Book
The easy
way to master
Explore the
world
of the nearly
human...
Robots,
Androids, and Animatrons,
12
Incredible Projects
You
Can
Build,
2E
John lovine
Presenting
a
new
edition that details building
12
exciting
robots,
including walker robots, solar
ball
robots,
speech
-controlled robots,
and
much more!
Ideal
for
the
first
time robot builder or
the advanced
hobbyist.
October
2001
275 pages
John lovine
Offers hands -on
directions
for
putting
Microchip's
RISC
-
based
chips with
up
to
8K
of memory to work. Starting
with simple projects and experiments, this book
leads
you
gradually into sophisticated
programming techniques.
2000.272
pages
ISBN
0- 07-
135479-4
$24.95
$29.95
ISBN 0-
07- 137683 -6
ThRobot
$19.95
Builder's
Bonanza
MICROCONTROLLER
PROJECT
BOOK
14110.11111
KIM
KW
New
edition
Mc
Hill
Grave
BARNES&NOBLE
BOOKSELLERS
www.bn.com
CIRCLE
143 ON
FREE INFORMATION CARD
A
Division of
The
McGraw
Hill
Companies
1MM
Ele
otronics®
THE MAGAZINE
FOR
THE
HANDS -ON ELECTRONICS ACTIVIST!
FEATURES
TALK
TO
THE
WORLD
FOR FREE!
Let
the
EchoBuster and iPatcher connect
you
to
the
world through
the
Internet.
John
Carter
and James
Heidenreich
cs
November
2001, Vol.
2,
No.
11
ular
Electronics
33
OP
-AMP AND COMPARATOR CHECKER
Construct
a
handy testing board
for
your
chips.
Charles Hansen
43
PRODUCT
REVIEWS
GIZMO®
See the
latest handheld
GPS
units, DVD players,
home -theater
power
distributors,
and
more.
7
HANDS
ON
REPORT
DTI's
3-D
LCD Display creates real depth three-dimensional imaging
on
your
desktop.
11
DEPARTMENTS
PROTOTYPE
Read all about
an
electronic drowning- detection system that
can save lives.
12
TECHNOSCOPE
Get
the
skinny
on
fiber
optics.
Elizabeth Jamison
21
SURVEYING THE DIGITAL DOMAIN
Let's
examine
the
various optical storage options, as well
as
broadband
access.
Reid Goldsborough
23
PEAK COMPUTING
Printers are dropping
in
price and rising
in
performance.
Ted
Needleman
26
SCIENCE:
FACT OR FICTION
Wading through the
conspiracies surrounding
the
Montauk and Philadelphia projects.
Brooke
A.
Berlin
28
O
&A
Readers come before
the
Electronic Guru
for answers.
Dean
Huster
47
ROBOTICS WORKSHOP
The
navigational
use
of contactless-angular
sensors
is
discussed.
Scott
M.
Savage
51
SERVICE
CLINIC
Using simple circuits
to
protect
your test equipment during high- voltage probing.
Sam
Goldwasser
54
BASIC CIRCUITRY
Get
a
'load" of
these battery- testing circuits.
Charles Rakes
57
AND
MORE
EDITORIAL
LETTERS
NEW
GEAR
YESTERDAY'S
NEWS
1
2
3
5
16
NEW
LITERATURE
POPTRONICS SHOPPER
ADVERTISING
INDEX
FREE
INFORMATION CARD
31
63
90
90A
Poptronics
(ISSN
526 -3681) Published
monthly
by
Gernsback Publications,
Inc.
275
-G Marcus
Blvd., Hauppauge,
NY
1788.
Second -Class postage paid at Hauppauge,
NY
and
at addi-
tional mailing
offices.
One
-year,
twelve
issues,
subscription rate
U.S.
and possessions
$24.99, Canada $33.15 (includes
G.S.T.
Canadian
Goods
and
Services Tax Registration
No.
R
I25I66280),
all
other
countries
$33.99.
Subscription orders
payable
in U.S.
funds only,
International
Postal
Money
Order or
check drawn on
a
U.S.
bank.
U.S.
single
copy price $4.99.
Copyright
2001
by
Gernsback Publications,
Inc.
All
rights reserved. Hands -on Electronics
and
Gizmo trademarks
are
registered
in U.S.
and Canada by
Gernsback Publications,
Inc.
Poptronics trademark
is
registered
in U.S.
and Canada
'Sy
Poptronix,
Inc. and
is
licensed
to
Gernsback Publications,
Inc.
Printed
in
U.S.A.
Postmaster:
Please send
address changes
to
Poptronics, Subscription Dept.,
P.O.
Box 459,
Mount Morris,
IL
61054 -7629
1
A
stamped
self- addressed
envelope must accompany
all
submitted manuscripts
and
/or
artwork or
photographs
if
their
return
is
desired should they
be
rejected. We
dis-
claim
any
responsibility
for
the
loss
or
damage
of
manuscripts
and
/or artwork
or
photographs while
in
our
possession
or
otherwise.
As
a
service
to
readers, Poptronics publishes available
plans
or information
relating
to newsworthy
products, techniques,
and scientiFic
and
technological developments.
Because
of
possible variances
in
the quality
and
cordition
of materials
and
workmanship
used by
readers, Poptronics disclaims
any
responsibility for
the
safe
and
proper
functioning of
reader-built
projects
based
upon
or from
plans
or information
published
in
this
magazine.
1
Poptronics®
Larry
Steckler,
EHF,
CET,
Editorial_
mailto: popeditor@gernsback.com
editor
-in
-chief
and
publisher
EDITORIAL DEPARTMENT
Chris
La
Morte,
managing
editor
Evelyn
Rose,
assistant
editor
Brooke A. Berlin,
editorial
assistant
Maybe
It
Was
A
Mistake
To
Think...
Maybe
it
was mistake to
think that
the
readership wouldn't
mind
some-
thing
a
little off the scale, such as
"Radio Signals and The Great
Pyramid." They would
not
grow
into
an
anger -fueled fervor
and
erupt
into
cries
of
outrage.
It
was to
be
a
catalyst plopped
into the
soup
of
mundane electronics.
CONTRIBUTING
EDITORS
Reid
Goldsborough
Sam
Goldwasser
Dean
Huster
John
!ovine
Elizabeth
Jamison
Ted
Needleman
Charles
D.
Rakes
Scott
M. Savage
Teri
Scaduto
PRODUCTION
DEPARTMENT
Ken
Coren,
production director
Kathy
Campbell,
production
manager
Michele
L.
Musé,
prepress specialist
Stuff
like:
"Hey
it
runs
on a
9
-volt battery.
It
only costs three dollars. When
you
press this switch
it
beeps and this knob controls
how fast
it
beeps.
What's that?
What does
it
do? Oh;
it
beeps."
Get the point?
So,
I
ART DEPARTMENT
Russell
C.Truelson,
art director
Michele
L.
Musé,
graphic
artist
CIRCULATION
DEPARTMENT
Gina Giuliano,
circulation
manager
REPRINT DEPARTMENT
Maria
Menichetti,
Reprint Bookstore x235
BUSINESS
AND
EDITORIAL
OFFICES
Gernsback Publications,
Inc.
275 -G
Marcus
Blvd.
Hauppauge, NY
1788
1
631-592-6720
Fax:
631-592-6723
President:
Larry Steckler
Vice-President:
Adria
Coren
Vice -President:
Ken
Coren
threw
it
into
the
mix. Oh,
and mix
it
did.
The
calls came
in
steady
the letters, too. Did you know most retired
engineers
have the
same
ver-
nacular
as
eighteenth century pirates? They called
me names;
they called
the
author
names; they asked leading questions. Luckily my military train-
ing
taught
me how to
maintain
my
bearing
in
times
of
interrogation. The
sit-
uation grew grim, but there was
a
lesson
learned
vocal
demographic
of
the readership
likes
their electronics straight
up.
That
is,
they don't want
any
tie
between Physics and "New Age pseudo-science."
All
they want are
components
and electricity.
According
to them,
the projects better follow
all
known laws
of physics.
If
the authors plan
on
breaking standards, then they
better
have hard data
backing
up
their claims
and
be
willing
to
share
all
their findings
with the masses. Unless these readers
can build
it
"for
real,"
they don't want
to read
about
it.
-
-a
SUBSCRIPTION
CUSTOMER
SERVICE/
ORDER ENTRY
800 -827 -0383
7:30 AM
-
8:30
PM EST
And here
is
the verdict:
Unless
I
hear
otherwise, that "stuff" won't
be
seen
in
these
parts
no more, ya
hear!
It
would
be such
a
pleasure
if
everyone could open
a
copy
of
Poptronics,
browse through the table
of
contents, and exclaim, "Awesome! Just what wanted!"
Well, we
can't
make
all
the people
happy, all
the time..
Needless
to
say,
won't ignore
my
core readership and dismiss them
as big,
mean skeptics
(you big,
blue
"Meanies!
").
In
closing,
let
me say
thanks. Thanks for the feedback
in
this grand
PLL we call
Poptronics.
I
I
Advertising
Sales
Offices
listed
on page
90
Cover
by
Michele
Lyn Musé
other news... "Robotics Workshop"
has
opened
its
doors once again.
This time Scott
M.
Savage
has the helm, and
he
plans
to
show our read-
ers
a
thing or two about robotics.
Mr.
Savage joins
the rest
of
our colum-
nists who
have
brought
you
a
wonderful November
issue. Kick back,
and crack
us
open.
It's
time for some electronics
-the
kind
hope
you
In
I
like.
VISIT
US
ON
THE INTERNET
AT:
www.gernsback.com
or www.poptronics.com
some
of the equipment
and
circuitry
described
in
POPTRONICS
may
relate
to
or
be
covered
by
U.S.
patents. POPTRONICS disclaims
any
liability
for
the infringement
of
such
patents
by
the
making, using,
or
selling
of
such
equipment
or
circuitry,
and suggests
that
anyone
interested
in
such
projects consult
a
patent attorney.
Since
Salutations,
(4
Christopher
La
Morte
Managing Editor
2
LETTERS
mailto: letten@gernsback.com
Corrections
for
"Radio
Signals
and The
Great
Pyramid"
"Limestone
is
a
sedimentary rock."
"
Poptronics
shouldn't
print
speculative
manuscripts without
prima-facie
evidence."
Next
time,
I
will get
corporate
to
spring
for
an
airline
ticket
so
I
can verify prototypes
that
are
in operation.
Well,
seriously folks;
here
are
just
a sprinkling
of
letters
that
seemed
to
materialize
from
the
aether
onto
my
desk.
For
the record,
I
believe
this
is
the
highest
volume
of
feedback ever received in
such
a short period
of
time.-
Editor
entists,
inventors,
and
even some
interesting
hobbyists.
Thanks
for
the feedback.
I
under-
stand
your
dismay
on
the
"Pyramid"
article.
We
meant
no
harm.-
Editor
Non
-Fiction
Goes
Fiction
I
am
writing about the preposterous
story about the
Great
Pyramid
in
the
September
issue
of
Poptronics.
I
assume you
will
get
a
lot
of
letters about
this one.
You say
the
author
writes
non-
fiction
books. Since this
article
is
not
factual,
isn't it
fiction?
It
is
so
outrageous
that
it
wouldn't
do even for an April
issue.
Pseudo
-Science Disappoints
I
have
been
a
loyal
reader
for
five
years.
Every
month I'm
always
glad to
receive
your periodical
and enjoy
shar-
ing
it with the
VT
students where
I
work.
Unfortunately, your article "Radio
Signals and
the
Great
Pyramid"
by B.K.
Bayles
wasn't up to standard.
To
suggest,
even with reservations,
that
"the
pas-
sages in
the
Great
Pyramid were pur-
posely
constructed
in
order
to provide
a
current
path for
massive
amounts
of
energy"
shocked
me.
The
evidence
doesn't support
this
silly
theory. Please
don't
let the need for new subscribers
entice you into
printing
pseudo-
science.
How
Sandia
National
Labs and NASA
can be in
the
same issue
with
B. K.
Bayles,
I
don't
know.
Poptronics,
please
come
back,
I
miss
you.
I
really enjoy
your current
selection
The
article abounds with
outstanding
errors,
besides
a
lot
of
weird imagina-
tion. Some examples
follow.
Paramagnetism
of
stones
has
nothing
to
do
with only
specific
heat
existing
at
or
above
76
is
not
measured
in
degrees
anyway.
Limestone
is
not
an
igneous
rock!
The
°F-
described. "Sandstone rock
will
contain
dirt
and
minerals"
-well
it
had better,
since
that
is
what it
is
made
of!
Etc.,
etc.
"Radio frequency
is
20Hz-
20kHz,"
is
true,
but
it
is
rarely
thought
of
in such
a
low-
frequency range,
and
it
really
has
no
obvious
upper
limit.
Skin effect at such
low
frequencies
is
at best only
a
concept.
What
is
meant
by
using alternating cur-
rent
instead
of
direct current to
"carve"
stone?
The
fantastic
story
says
to
follow
along with
Fig.
2,
but
from there onward
references
are
to
lettered
things
while
Fig.
2
has
only
numbered things. It
seems
you only
printed part of
a
longer
story
as
there
are large
gaps
in
its
attempt
at
logic. Plus,
I
never
did find
out
how the
thing
becomes an
alternate
source
of
energy.
My question
is,
why
did
you waste
so
many pages
of
Poptronics
on such
garbage
??
imprinted magnetism
of
a
rock
does
not
tell its age.
Sandstone
is
not
formed
as
KENNETH
E.
STONE
Cherryvale, KS
Perhaps
I
felt that
the readers would
be
whipped into a
frenzy of
discussion
on
the
topic
of
energy
production using photovoltaic
means. Actually,
this did happen in
some
instances.
However,
other
people seemed
to
be
insulted
and
lashed
out.
That
reminds
me...1
have
to
go
smack my
weather man!
Thanks
for
the feedback,
sir-Editor
KEEP
IN
TOUCH
We
appreciate letters
from our
readers. Comments, suggestions,
questions,
bouquets, or brickbats
...
we
want
to
hear from
you
and find
out what you
like
and
what
you dis-
like.
If
there
are
projects
you
want
to
see or
articles
you
want to
submit
we
want
to know
about them.
You
can write via snail
mail to:
-
of departments; Iovine,
Goldwasser,
Rakes,
and
others
are
doing
a
fine job.
Please
consider adding one more
depart-
ment-biography.
Hugo
Gernsback often
looked
into the
lives
of
uniformed tech-
nicians in
both
the
civilian and
military
arenas.
Why not
bring
back this
tradi-
tion,
and once
a
month
interview
a
sci-
entist, engineer, or technician to
see
what their
job
is
like
and
where they
think the
future
will
bring
us.
Just
a
Letters
Poptronics
275
-G
Marcus
Blvd.
Hauppauge,
NY
11788
Sending letters
to
our subscription
address increases the time
it
takes
to
respond
to
your letters,
as the mail
is
forwarded
to
our editorial offices.
Our
e
-mail
address
can
be
found
at the top of the
column.
Of course,
e
-mail
is
fast.
All of
our
columnists
can
be
reached through the e-mail address-
es at
the head
of
each column.
And
don't forget
to
visit our Web
site:
www.gernsback.com.
Scientific
Exceptions
I
am
a
regular subscriber
to
Poptronics
and
count
on it
providing
me
with scientific knowledge.
I
enjoy
it
very much.
However,
I
take exception to the
September
2001 issue,
which devoted
eight
pages
of
rambling -on about
"Radio
Signals and
the
Great
Pyramid."
I
began to question the author's scientif-
ic
acumen when,
in
the second sentence,
she
talked
about "energizing the
pas-
sages
of
the
Great
Pyramid with radio
signals to
build
a
triode amplifier
and
generate electricity."
I
tried to read
carefully
a
number of
paragraphs thinking
that
I
might
be
missing something.
I
could
not
find any
logic anywhere. Even
the diagram
thought.
Keep
up the
good work.
D.
E.
CHADBOURNE,
CET
Ray
Brook,
NY
That
is
an
excellent idea,
sir.
I
think
the
readers would
enjoy
brief
biographies
of
sci-
3

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin