Practical
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East Sussex BN1 3RA
Editor
Matt Pulzer
General Manager
Louisa Pulzer
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Alan Winstanley
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Publisher
Matt Pulzer
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Technical enquiries
We regret technical enquiries cannot be answered over the
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rep ir or modifi io o ommer i l e ipme or e i orpor io
or modifi io o de i
p li ed i
em
zi e We
o
provide data or answer queries on articles or projects that are
more
fi e e r old
Questions about articles or projects should be sent to the editor
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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.
Volume 51. No. 3
March 2022
ISSN 2632 573X
Editorial
Something for everyone
Welcome to the March 2022 issue – another packed magazine with
something for readers of all levels and interests. I do get asked
from time to time why there are so few projects for beginners. It’s a
good question, and I suppose the answer is the one all editors fall
back on – there’s only so much space in each issue. However, I do
understand that electronics can be a bit intimidating for beginners
and some of our larger, more involved projects do require
experience and knowhow. With that in mind, this month we have
a couple of nice projects that should appeal to readers just starting
out in electronics. The Busy Loo Warning design has many uses
– not just the one on the tin – and is an excellent introduction to
project building. Likewise, Julian Edgar’s Laptop Speakers article
demonstrates that you don’t need super expensive drivers and an
apprenticeship in joinery to make a good, simple pair of speakers.
Both of these projects are thoroughly recommended.
Blast from the past – Part 2
In the February issue, I asked if anyone remembered – or even
kept – some of the ‘giveaways’ that used to be supplied with
PE/EE/EPE. What a great response! – I don’t have the space to
thank all of you personally, but I particularly enjoyed hearing
from Mike Cowlishaw (Constructor’s Guide and wire-bender
template); Ashley Cundy (green PE PCB/pin-out ruler plus two
other goodies); and Mike Hill, who wrote, ‘I’ve never used the tool
rack (Patent Pending!), but the wire-bending gauge for use with
perfboard must be the most useful free gift ever. It is dated 1976.’
I don’t think I’ve seen Mike’s wire-bending gauge before, but it’s a
great idea – see the orange ‘triangle’ below. Perhaps someone could
resurrect it with a 3D printer?
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
e
ri
r pr i
le
d er i eme
re o 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.
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
e ore
i
r
mi i or elep o e e ipme
fi e
o fi
io o e ipme
d or impri o me
re l rom
illegal use or ownership. The laws vary from country to country;
readers should check local laws.
Practical Electronics | March | 2022
Looking for a job in the Isle of Wight?
Last, we take the occasional job ad, and this month there is an
opportunity in the Isle of Wight – see page 17. I only mention it
here because I went on holiday there a couple of years ago and it’s
a fabulous place. Have a look if you want to combine electronics
with a beautiful location in southern England.
Keep well and stay healthy
Matt Pulzer
Publisher
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