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Edition 4/2018
|
July & August 2018
|
www.elektormagazine.com
lektor
labs
magazine
Q
(almost)
everything
you wanted to
know about
Soldering
Experimental
Doppler Radar
Nixie
Bargraph
Thermometer
High-tech look with a
vintage Nixie tube
or how to build your own speed trap
POV Fidget
Spinner
User-programmed
illuminated text strings and animations
IoT Security Suite
Making the Complex Simple
The IoT Security Suite for the SAMA5D2 MPU enables rapid and easy use of its advanced
security features, such as ARM® TrustZone® technology and hardware cryptography,
without a long learning curve. The suite covers the security requirements for IoT
device manufacturers in a single, easy-to-use package. It supports storing, encrypting,
decrypting and exchanging keys between devices and applications, and its easy-to-use
APIs save you time.
Features
Trusted Boot
– Root of Trust (RoT) verified startup
Firmware Protection
– Encryption and execution of authenticated firmware
Trusted Device ID
– Unique device certificate tied to the RoT
Secure Storage
– Secure storage of keys, certificates and data
Secure Communications
– Authenticated device pairing and IoT cloud communications
Secure Firmware Update
– Securely upgrade firmware remotely
Download the IoT Security Suite Evaluation Kit (free) to get started.
SAMA5D2 Xplained Ultra
Evaluation Board
(ATSAMA5D2-XULT)
www.microchip.com/SAMA5D2
The Microchip name and logo and the Microchip logo are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. ARM and Cortex are registered trademarks of ARM Limited (or its subsidiaries)
in the EU and other countries. All other trademarks are the property of their registered owners. © 2018 Microchip Technology Inc. All rights reserved. DS60001511A. MEC2201Eng01/18
Elektorlabs Magazine
Edition 4/2018
Volume 44, No. 490
July & August 2018
(continued from: Elektor Magazine)
ISSN 1757-0875
(UK / US / ROW distribution)
www.elektor.com
www.elektormagazine.com
Elektorlabs Magazine, English edition
is published 6 times a year by
Elektor International Media
78 York Street
London W1H 1DP
United Kingdom
Phone: (+44) (0)20 7692 8344
Head Office:
Elektor International Media b.v.
PO Box 11
NL-6114-ZG Susteren
The Netherlands
Phone: (+31) 46 4389444
Fax: (+31) 46 4370161
Elektor Labs at the hub
It’s both pleasing and rewarding to observe not just the growing number of users of the
Elektor Labs website, but also the impressive quality of projects submitted from all over
the world. One noticeable example is the ESP32 Design Contest organised jointly by Elek-
tor and Espressif, which resulted in a flurry of tech-creative ideas. In the future we should
have more such initiatives. Be it with or without sustenance from the electronics industry,
what counts to us is strong interaction between community members, underpinning the
role of Elektor Labs as a serious development platform with appreciable added value.
With a larger volume of project ideas posted on the Elektor Labs website, more “high-
flyers” are available to our labs staffers for enhancing and perfecting into tried & tested
products eventually supplied to you in the form of a PCB, kit, module, or a piece of
software.
Besides honing rough diamonds, Elektor Labs will increasingly test and select products
picked from the rapidly evolving electronics market, and present their verdict to you.
These independent tests can be found in the magazine alongside the Full Monty on all
Labs-approved projects.
All of these new developments and more have prompted us to rename
Elektor Magazine
to
ElektorLabs Magazine.
And so do justice to the central role of Elektor Labs within our
organisation. Our original by-line: Learn – Design – Share now has rectification built in to
suggest a steady flow of current — check the symbols on the front cover! As always we
welcome your response to the changes to your favourite publication.
Memberships:
Please use London address
E-mail: service@elektor.com
www.elektor.com/memberships
Advertising & Sponsoring:
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Phone: +49 170 5505 396
E-mail: margriet.debeij@eimworld.com
www.elektor.com/advertising
Advertising rates and terms available on
request.
Jan Buiting, Editor-in-Chief
Copyright Notice
The circuits described in this magazine are for domes-
tic and educational use only. All drawings, photographs,
printed circuit board layouts, programmed integrated
circuits, disks, CD-ROMs, DVDs, software carriers, and
article texts published in our books and magazines
(other than third-party advertisements) are copyright
Elektor International Media b.v. and may not be repro-
duced or transmitted in any form or by any means,
including photocopying, scanning and recording, in
whole or in part without prior written permission from
the Publisher. Such written permission must also be
obtained before any part of this publication is stored
in a retrieval system of any nature. Patent protection
may exist in respect of circuits, devices, components
etc. described in this magazine. The Publisher does
not accept responsibility for failing to identify such
patent(s) or other protection. The Publisher disclaims
any responsibility for the safe and proper function
of reader-assembled projects based upon or from
schematics, descriptions or information published in or
in relation with Elektor magazine.
The Circuit
Editor-in-Chief:
Translators:
Jan Buiting
David Ashton, Jan Buiting, Martin Cooke,
Ken Cox, Arthur deBeun, Andrew Emmerson, Tony
Marsden, Mark Owen, Julian Rivers
Membership Manager:
Raoul Morreau
Denis Meyer, Jens Nickel
Laboratory Staff:
Thijs Beckers, Clemens Valens, Ton Giesberts, Luc
Lemmens, Jan Visser
Graphic Design & Prepress:
Giel Dols
Publisher:
Don Akkermans
International Editorial Staff:
Mariline Thiebaut-Brodier
© Elektor International Media b.v. 2018
www.eimworld.com
Printed in the Netherlands
www.elektormagazine.com
July & August 2018
3
This Edition
Volume 44 – Edition 4/2018
No. 490
July & August 2018
48
Regulars
11 Elektor Connexions
12 Questions and Answers
(almost) everything you need to know
about… Soldering.
26 Err-lectronics
Corrections, Feedback and Updates on
projects published.
43 Peculiar Parts, the series
GI AY-3-8500 Video Game IC.
58 Homelab Helicopter
Remarkable items spotted for the home
electronics enthusiast.
72 Tips & Tricks
Door alarm mod detects water.
84 Elektor Store Highlights
Two ‘Scopes and the IoT.
Nixie Bargraph
Thermometer
High-tech look
with a vintage Nixie tube
30
98 Elektor Labs Pipeline
106 Retronics: Introduction to
Microprocessor Technology
with the Kosmos CP1 (1983)
Every journey begins with a single step.
110 Elektor Ethics:
A Zettabyte for Total Control
and keeping everyone in the dark.
112 Elektor Store
114 Hexadoku
The original Elektorized Sudoku.
Nixie tubes are always fascinating. Nowadays they are
mostly used for clock displays, such as the project in
the May/June 2016 issue of Elektor [1]. The ‘Nixie’
bargraph tubes for analogue readout in the form of a
column of light are less well known. Strictly speaking,
they are not Nixie tubes because they do not display
numerals, but they have the same warm retro allure
because they are also filled with neon gas. The
thermometer described here uses a Russian IN-9
tube and is a nice alternative to the usual
clock projects.
Features
10 Repair to Wi-Fi Card
with MHF4 SMD Connector
On installing a more capable Wi-Fi module
than the module fitted to the machine as
standard.
Projects
6 Simple Pitch Follower
Music made easy.
(almost) everything
you wanted to know
about...
56
electronica
Fast Forward 2018
The winning start-up, two years on.
Soldering
82 ESP32 Design Contest 2018
The Winners
A big Thank You! to all of you who accepted
this challenge and made this contest a
success.
15 Digital Calliper Readout with Platino
Upgrade your lathe.
22 DAB on a Dongle Stick
Free software turns cheap DVB-T USB sticks
into DAB radios.
4
July & August 2018
www.elektormagazine.com
lektorlabs
magazine
62 Elektor SDR Shield 2.0 (1)
Experimental
Doppler Radar
POV Fidget Spinner
Rotating Animations
Reception and tuning
with this versatile new device.
69 Stencil Frame for Reflow Soldering
Save money the DIY way.
74 POV Fidget Spinner
Rotating animations.
86 Heating Monitor using ESP8266
Keep tabs on your energy usage.
or how to build your own speed trap
92 Chirpie Chirpie… Cheepit
Microcontroller programming
with audio files.
100 Laser Time Writer
Sand Clock modified into LTW.
Actually fidget spinners are totally out, but the one described here is DIY
and it and can display user-programmed illuminated text
strings and animations. That might be enough to get
a bit of attention this summer.
Next Editions
74
12
30 Nixie Bargraph Thermometer
High-tech look with a vintage Nixie tube.
Elektorlabs Magazine 5/2018
VHDL Course • Analogue Alternating Linear LED Fader
• Function Generator • GPS-based 10-MHz Reference •
VFD Clock •Short-Seeker •74xx TTL LED Clock • Remem-
bering the SN76477 • Cute temperature controller • DIY
solder station • and more.
ElektorLabs Magazine edition 5 / 2018 covering September &
October is published around 23 August 2018. Delivery of printed
copies to Elektor Gold Members is subject to transport.
Contents and article titles subject to change.
Elektor Business Edition 4/2018
Elektor Business Edition issue 4 / 2018 has a focus on
Automotive.
Contributions come from companies, re-
search institutions as well as private authors, covering
professional approaches to analogue and digital auto-
motive electronics and technologies. Plus you’ll find fresh
instalments of all the EBE regulars like Infographics,
Operation Marketing, Our Business, and Business Store.
Elektor Business Edition issue 4 / 2018 is published in print on 12
June 2018 to Elektor Gold members, and Elektor Green members
as a pdf download. The edition is also available for purchase at
www.elektormagazine.com.
38 CAN Bus Debugging Tool
CAN 2GO: easy to use and low-cost.
44 Elektor RPi Audio DAC and Volume
Control Tweaks & Updates
Thanks all for asking and contributing.
48 Experimental Doppler Radar
or how to build your own speed trap.
www.elektormagazine.com
July & August 2018
5

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