Elektor Electronic #395 - November 2009.pdf

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[
Analogue
•
Digital
•
Microcontrollers & Embedded
•
Audio
•
Test & Measurement
]
November 2009
AUS$ 13.90 - NZ$ 16.90 - SAR 99.95
£ 4.65
www.elektor.com
Electronic Component
Ordering
Retail’s gone e-tail
R32C Web Server
Networking module for HTTP,
e-Mail, FTP and much more
Light Therapy Box
Blue LEDs combat winter blues
Solder Station ‘Plus’
With integrated DVM
R48
mikroElektronika
SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD
Refresh — not just the
readout
Those of you with an eye for detail will
not have failed to notice that Elektor
looks, well, different this month. After
an analytical look at the existing page
layout we decided to go for a less clut-
tered design without hairlines, slightly
thicker lines, solid bars, shadows around
boxes — to mention just a few styling
elements. A new type font and an even
tidier cover should give the magazine a
fresh lease of life.
Your initial response might be “don’t
bother, I read all your stuff anyway”.
That’s highly appreciated, but there are
more changes afoot at Elektor than just
cosmetic touches to the monthly prin-
ted product. At a deeper level, we would
like the magazine to remain up to date
in terms of technology while keeping
up the quality level our customers have
come to appreciate over so many years.
Quite some time and effort was spent
recently on the above issues and a
number of conclusions reached. Here’s
a quick summary of the main goals
we hope to achieve: 1) Elektor should
provide clearer pointers into the subject
matter covered (see the five main areas
we’ve defined in the text bar above
the logo); 2) members of the editorial
team should increasingly speak out
on their personal fortes, interests and
preferences (they already do in Editorial
Board meetings); 3) the Elektor Lab has
a central role in respect of the technical
quality of the articles and consequently
gets a central position in the magazine
(‘E-Labs Inside’ section a.k.a the blue
pages); 4) new online activities (to be
launched later this year) should bet-
ter serve the various communities out
there; 5) all these changes should be
transparent from, as well as under-
scored by, the magazine pages, hence
the restyling as of this, your very own
November 2009 issue.
Will you change along?
Wisse Hettinga
Elektor International Editor in Chief
6
Colophon
Corporate information on Elektor magazine.
8
News & New Products
A monthly roundup of all the latest in
electronics land.
14 Where (in the World) Can You Get It?
A who/what/where story on contempo-
rary ordering of electronic components.
20 R32C Webserver
Cheerfully supports http, email, ftp and
more.
28 ATM18 BASIC Computer
AVR micro simulates vintage home PCs
like the ZX81.
32 Arduino + Theremin = Theremino
The legendary hand operated instrument
now cast in Arduino.
36 New Developments in Class D
Look, reduced EMI and no output filter!
38 Solder Station ‘Plus’
A commercial low-power solder iron gets
real temperature control.
43 AVR, dB and LDR collide
at D/A Junction
Some components just don’t get along
very well.
44 CAD in the Elektor Lab
The introduction and use of Altium by our
design staff.
45 Sine Wave Service
A very old project
gets lab support all the way.
11-2009
elektor
CONTENTS
20 R32C Webserver
A small add-on module for the application board from our September 2009 is-
sue combines a TCP/IP chip plus Ethernet interface, a network connection with
built-in transformer and status LEDs. This handy combination makes it child’s
play to implement a web server and many other Internet applications without
getting involved in complexities such as TCP/IP protocol.
Volume 35
November 2009
no. 395
48 Light Therapy Box
Blue LEDs fight SAD a.k.a. the Winter
Blues.
52 Driver-free USB Interface
Data harvesting with the Elektor ECIO and
an HID.
56 IGLOO Nano & Icicle FPGA kits
A review of two really cool products from
Actel.
60 The World’s Smallest Electric Motor
32 Arduino + Theremin = Theremino
This tiny oscillator circuit, when coupled with the software running on the Ar-
duino microcontroller board, has a huge range of potential applications, allo-
wing proximity-based control of any other circuit or system.
How an Elektor reader made it into the
Guinness Book of World Records.
64 AVR-Max Chess Computer
A minimalist homebrew chess computer.
67 Booster for Audio Signals
A simple project to crank up bass and
treble levels.
38 Solder Station ‘Plus’
Twenty pounds or so would probably buy you a simple soldering station but it
would not give you the same satisfaction as one that you built yourself and be-
sides it would not have the energy control or DVM features of this design with
its in-built microcontroller.
70 USB Mouse using R8C/13 Starter Kit
Tom Thumb encounters a Mouse
called USB.
74 Hexadoku
Our monthly puzzle
with an electronics touch.
76 Retronics:
Klystrons type 2K25 and 2K56
48 Light Therapy Box
During the winter many people suffer from Seasonal Affective Disorder (SAD),
which is commonly known as the Winter Blues. With the help of blue light the-
se symptoms can be reduced. The blue-light generator described here has a
built-in timer and is perfect for this task.
Regular feature on electronics ‘odd &
ancient’.
84 Coming Attractions
Next month in Elektor magazine
elektor
11-2009

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