Practical
Electronics
olume . o.
June 2021
I
Contents
Projects and Circuits
Touchscreen Wide-range RCL Box – Part 1 by Tim Blythman
Our new Touchscreen Wide-range RCL Box not only gives you a range of
resistances and ca acitances ut also inductances all at your fingerti
16
oadies est ignal enerator by John Clarke
This test oscillator is ideal for testing balanced and unbalanced inputs on
ro essional sound e ui ent. t s s all rugged very orta le and easy to use.
24
Concreto
ea er ystem by Allan Linton-Smith
hese enclosures are stoc standard concrete uilding loc s
find at very lo cost in ust a out every hard are store. ntrigued
30
eries
the ty e you ll
ead on
eatures and Columns
he o
e ort by Barry Fox
Online health – the good, the bad and the ugly
te ie i .co
ic o the onth lan lu lein
8
echno al by Mark Nelson
Bad science and good
10
et or by Alan Winstanley
his onth the longter e ect o loc do n and technology on here e or
legacy e ory devices and a round u o the latest e citing s ace ne s.
12
ic
art
tart by Mike Tooley
a ing sense o inductors
36
Io Cric et by Md. Khairul Alam
art
o
ade easy or everyone
Audio Out by Jake Rothman
icro hone rea lifier or ocoder
42
48
art
a e it with icromite by Phil Boyce
art
nternet connection ith an
i i
odule
art
Circuit urgery by Ian Bell
Transformers and LTspice – Part 1
58
a s Cool eans y ax The agnificent
lashing
s and drooling engineers
art
62
Wireless for the Warrior
u scri e to Practical Electronics and save money
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PE Teach-In 8
PE Teach-In 9
irect oo
ervice
uild your li rary o care ully chosen technical oo s
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ervice
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Classified ads and Advertiser inde
e t month highlights of our ne t issue of Practical Electronics
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egulars and ervices
Made in the UK.
Written in Britain, Australia,
the US and Ireland.
Read everywhere.
© Electron Publishing Limited 2021
Copyright in all drawings, photographs, articles,
technical designs, software and intellectual property
published in Practical Electronics is fully protected,
and reproduction or imitation in whole or in part are
expressly forbidden.
The July 2021 issue of Practical Electronics will be
published on Thursday, 3 June 2021 – see page 72.
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