Elektor Electronic #402 - June 2010.pdf

(22050 KB) Pobierz
rl-
rl
atrrFllrl!!l
June zoro
AUS$t3.9o
-
NZ$r6.9o -
SAR99.95
Lq.6S
+
WHAT
Free
Audio Measuring
Software
Jro-uuheels
#:ar
electronics
OBD2
Simulator
iProgrammable
DIYRFID
r'
home-brew
tags
r'
wireless
electricity
I
nte
rSceptre
Exte
nsion
Board
lllll[|1[llllllllililllil
opens
doors
(and
portsl
for
you
ffi
I
EASYAUNO
$MPIY
EASI1Y
6YEARS OF DEVELOPMENT
SYSTEM
IMPROVEMENT
ffiffiffiffi
.j
rne
[asyAURt"6
GET
IT NOW
www.m ikroe.com
EasyAVR'"6
microcontrollers
using
a
PC
includes anrdn.bOard
programrner
pffOfiding
an
interface
for
programming
' '
AVR@
compilers
AVRprog" programmer
ExpERTENcE
rHE
EAsE
oF
cREAnNG
youR
owN
ELEcrRoNtc
DEVtcE
wtrH
Milrrotlekttoni[a
t:
D
EVEL.P
rvi
ENr
-"
::":::tT
:::?:
your
concepts tly
quicker.
The
RS
EDP.
No
other
plotform
cqn
mqke
EMBEDDED
DEVETOPMENT
PTATFORM
rswww.com/edp
08457
2Ol2Ol
T&M
is
everywhere
lf
you
lool<
at
a
thousand electronic
cir-
gektor
Colophon
Who's who at
Elektor magazine.
8
10
cuits, which
is
time
consuming but pain-
less
by
browsing,
say,
ten volumes
of
Elel<tor,
it's
not
too difficult to pinpoint
an aspect of
test and measurement
in
at
least
five hundred.
ln some
cases,
it's
there
right
in
front
of you:
the audio
amplifier requiring
an
ammeter
to
set up
the quiescent current
in
the final
stage;
the
latest
microcontroller
board
with
12-bit
ADC
channels
to
hool<
up sensors
Elel<tor
Foundation Awards
zoro
News &
New Products
A
monthly
roundup
of
all
the
latest
electronics
land.
in
(which
are'totally'
measurement); or
the
linear power
supply
with
its
current
sensing resistors
somewhere
telling
the
control
circuit when
to
shut down the
output
voltage.
ln
other
cases,
you
have
to
thinl<
harder
to
identify the "T&M" factor
in
a
circuit
or
publication,
and
you
might
be
inclined
to
say
"none
in
this one"
with
some
confidence.
But
do not
forget your intui-
tion
as a
powerful instrument for
lots
of
measurements of
the
unscientific
type.
Personally
I
can never resist
gauging the
temperature
a
power
transistor
or
a
volt-
age
regulator
is
running
on its
heatsinl<,
simply
by
first sniffing the
air
above
the
heatsinl<
and
then
-
just
maybe
-
touch-
ing
the
surface
with
my
finger.
No
Ptroo
probes or
lR
gun
thermometer required
-
anything running
above
4o
celcius
or
so
is
ever so easy
to
spot.
Another
meas-
urement completed
to
prevent
trouble
arising
-
coarse
but
okay.
ln
this
edition
of
Elektor
T&M
is
all
over
the
place
-
in
OBD,
too.
Your car
is
constantly measuring
a
hundred
or
so
parameters
to
checl<
for faults
and
if
one
occurs, flags an
error
code
for
reading out
through
the
OBD
interface.
lf
you're
an
astute Elektor
reader
then
surely
you'll want
to
use
the
Elel<tor
OBD
analyser
for
that
purpose
-
after
all,
you
don't
want
to
be
taken for
a
ride
byJoe
from
the
garage
down
the
blocl<.
With
this
month's
OBD
Mini Simulator
(page
r8)
it's
not
necessary
anymore
to
plug
into
a
lot of
cars
with the
Engine
Failure
light
on,
just
to
convince
yourself
that
your
OBD
analyser
is
worl<ing
properly, or indeed
to
learn
to
worl<
with
it.
Safety
is
not
just
in
numbers but
in
measurement
results
too.
Jan
i6
Energy
from
the lnternet,
Water and
lCs
We discovered some
unexpected
sources
of
electrical
energy you,
too,
might want
to tap into
to
help
save
the
planet.
r8
OBDz
MiniSimulator
A chicl<en
and
egg problem
ended:
this
simulator will tell for
sure
if
your
OBD
analyser
is
worl<ing
properly
-
with
no car
a
'$
-dsl
I
rou
nd.
24
Wireless
Electricity
meets
RFID
An end
to the
myth
held up by
professionals saying you
can't
mal<e
your
own
RFID
readers, personalized tags,
or
an
RFID
system
to transfer
energy.
32
High
Speed
Flash
Trigger
Here's how
the
Elektor ATMr8 board
tal<es
control of ultra-fast photo flashing for
events
requiring
high
time
resolution.
36
DMX5rz
Control lnterface
Based
on
a
Cypress
PSoC
powerhouse
this
DMX5rz
controller
has a mass
of
functionality
and
a sleel<
user
interface, too.
43
Two
USB
scopes and
one not
so
U5B
oscilloscopes
are
USB
allthe
rage.
This
month
E-LABs
examined three
instruments,
one
low
cost,
one
high
end, and one
with
no
USB
and no
PC
connected
-
yes,
it's
stand alone!
46 Audio teamworl<
to
provide
assistance
with distortion
measuTements
E-LABs
were called
in
on
a
few
high-spec
audio amplifiers.
Some quirl<y results!
48
Buiting, Editor
Measuring
for
Free
Why
buy expensive
test equipment
if
4
o6-:r,-l
elel(tor
CONTENTS
18
OBDz
Mini
Simulator
little
uncomfortable
especially
if
you
52
Volume
35
f
une
2o1o
no.4o2
your
PC, a
good
soundcard and
some
free software
are
just
fine
for many
measurements
in
the
audio
frequency
range?
OBD
testing on
a real vehicle
can
be a
don't
have
the
option
of worl<ing
in
a
garage. The
Minisim simulates the
signals
that
you
would
normally expect
to
encounter when you plug
an
OBD
analyser
into yourvehicle's
OBDz
connector.
This allows you
to carry
outtesting
and de-
velopment
of
a
new
analyser design
from
the
comfort
of
your own
lab bench.
LiPo
AutoBalancer
Here
we get
to
grips
with
zs,
3s
and
4s
Lithium
Polymer
battery
pacl<s
and
the
need
to
balance
their charging
process.
58
lntersceptre
opens
doors (and
ports!)
for you
convenient
prototyping of
soph
isticated
m
icrocontrol
ler
applications
becomes
a
reality
with
this
multi-platform
extension
board.
Fast,
24
Wireless
Electricity
meets
RFID
64
Starry
Night
This
unique
celestial slide show displays
the major constellations
using an
MSP43o
RFID
tags
based
on
the
EM4roz chip are cheap, even
in
small
quantities,
and
readily available. ln
this project we
use a
small
printed circuit
board
with
the
EM4o95 reader
lC
mounted
on
it, which
allows you
to
transfer
the
data
from
the
RFID
tag to
an
ATMr8
test
board. The reader board
can
also
be used
to
mal<e
an
RFID
reader using
an
ATtinyz3r3.
microcontroller.
Fully confi
gurable
and
expandable
it's
sure
to
be
a
talking
point.
68
Alternative
HiFi Power
Supplies
dirt
cheap
switch-mode power
supplies
from
China
Here
we
examine
if
those
etc. are
any
good for
serious
audio
applications.
36
DMX5rz
Control lnterface
The DMX5rz
protocol
is
a professional standard
for controlling lighting
equi-
pment.
However,
truly
general-purpose DMX
driver
interfaces
are
far
from
cheap. This
circuit
provides
a
wide variety
of
outputs
and
is
based on
a
Cypress
PSoC
device
that
supports
visual
configuration.
This
mal<es
it very
easy
to gene-
rate
the
desired
setup for
lighting
systems.
71
My
Friend
the
Accelerometer
accelerometer
device
onto
a loudspeal<er
cone, add
a
suitable
preamplifier
and
you
have
a
tool
ofthe
trade for
advanced
acoustic
measurements.
Ed
Simon explains.
Sticl<
an
74
Design
Tip:
Mini
dice
A
PIC
and
a
few
LEDs
make
a
dice
circuit
that
does really
well
in
terms
of
randomness.
76
48
Measuring
for
Free
Most of you
will
be aware
that
an oscilloscope and
a
function
generator
are
required
for
in-depth investigation
of
electronics circuits.
However, using
a
PC
and some free
software
you can
have
this functionality for low
frequency
measurements,
without
having
to buy'real'
test
equipment.
77
Hexadol<u
Our
monthly
puzzle
with
an
electronics
touch.
Retronics: elel<terminal (r978)
Regular
feature
on
electronics 'odd
&
ancient'.
Series
Editor:
Jan
Buiting
84
Coming
Attractions
Next
month
in Elektor magazine
elektor
o6-zoro

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin