Practical
Electronics
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Practical Electronics
Electron Publishing Limited
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01273 777619
Mob 07973 518682
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Email pe<at>electronpublishing.com
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Advertisement offices
Practical Electronics Adverts Tel
01273 777619
1 Buckingham Road
Mob 07973 518682
Brighton
Email pe<at>electronpublishing.com
East Sussex BN1 3RA
Editor
Matt Pulzer
General Manager
Louisa Pulzer
Digital subscriptions Stewart Kearn Tel 01202 880299
Online Editor
Alan Winstanley
Web Systems
Kris Thain
Publisher
Matt Pulzer
Print subscriptions
Practical Electronics Subscriptions
PO Box 6337
Bournemouth BH1 9EH
Tel
01202 087631
United Kingdom
Email pesubs<at>selectps.com
Technical enquiries
We regret technical enquiries cannot be answered over the
telephone. We are unable to offer any advice on the use, purchase,
repair or modification of commercial e uipment or the incorporation
or modification of designs published in the maga ine. e cannot
provide data or answer queries on articles or projects that are
more than fi e years old.
Questions about articles or projects should be sent to the editor
by email: pe<at>electronpublishing.com
Projects and circuits
All reasonable precautions are taken to ensure that the advice and
data given to readers is reliable. We cannot, however, guarantee
it and we cannot accept legal responsibility for it.
A number of projects and circuits published in Practical Electronics
employ voltages that can be lethal. You should not build, test,
modify or renovate any item of mains-powered equipment unless
you fully understand the safety aspects involved and you use an
RCD (GFCI) adaptor.
Component supplies
We do not supply electronic components or kits for building the
projects featured, these can be supplied by advertisers. We
advise readers to check that all parts are still available before
commencing any project in a back-dated issue.
Advertisements
Although the proprietors and staff of Practical Electronics take
reasonable precautions to protect the interests of readers by
ensuring as far as practicable that ad ertisements are bona fide
the magazine and its publishers cannot give any undertakings
in respect of statements or claims made by advertisers, whether
these advertisements are printed as part of the magazine, or in
inserts. The Publishers regret that under no circumstances will
the magazine accept liability for non-receipt of goods ordered, or
for late delivery, or for faults in manufacture.
Volume 49. No. 2
February 2020
ISSN 2632 573X
Editorial
Happy New Year
Welcome to 2020 and a brand new Practical Electronics. I do hope
Christmas treated you well and you’re all set for a bumper year of
unmissable projects and your favourite columns.
This issue sees the second part of a particularly ambitious and
interesting project – the Audio Digital Signal Processor (DSP). If
audio and advanced PICs are your thing, then this really is a mustbuild. But the fun doesn’t stop there, because to some extent this is
a misnamed project. It is actually a set of general-purpose building
blocks for numerous digital signal processing applications. We
will be reusing it for future projects totally unrelated to audio – for
example, a DIY reflow soldering oven/PID temperature controller.
It’s a fascinating collection of DSP circuits – just the project to test
you over the long winter nights!
It’s launched!
Yes, at long last our new shop is up and running (see this month’s
Net Work). Huge thanks go to our web systems manager, Kris
Thain, plus the unstinting support of Alan Winstanley. In many
ways a smoothly running web shop is a bit like a sophisticated,
but low component component PIC circuit. On the surface there
isn’t much to see, but under the bonnet a great deal of hard work
has gone into the apparent simplicity. Again, thank you Kris and
Alan. We’ve had lot of orders so – I think! – it is basically working
well, but do get in touch if you have any problems.
PDF download passwords
One area where we have had a little difficulty is with usernames/
passwords for those of you who buy Practical Electronics as a
downloadable PDF. It is vital to understand that for historical
reasons the shop and the download system are entirely separate.
Your username/password for one is not the same as for the other.
You set up the username/password for the shop, but we issue you
with the password for downloads. This is not satisfactory and we
are working to change to something seamless – please bear with us
just a little longer as we move to a single unified system.
From all of us at Practical Electronics, have a great 2020!
Matt Pulzer
Publisher
Transmitters/bugs/telephone equipment
We advise readers that certain items of radio transmitting and
telephone equipment which may be advertised in our pages
cannot be legally used in the UK. Readers should check the law
before buying any transmitting or telephone e uipment as a fine
confiscation of e uipment and or imprisonment can result from
illegal use or ownership. The laws vary from country to country;
readers should check local laws.
Practical Electronics | February | 2020
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