Practical
Electronics
Volume 51. No. 10
October 2022
ISSN 2632 573X
Contents
Projects and Circuits
SMD Test Tweezers by Tim Blythman
This clever little device can measure the values of SMD resistors and capacitors,
plus show diode and LED orientations and measure their forward voltages.
16
Tele-com by Greig Sheridan and Ross Herbert
22
Do you have a classic Bakelite phone with a real bell that generates a fantastic ring
sound? Now you can hear it again and speak to someone at the other end!
Touchscreen and Remote Digital Preamp with Tone Controls – Part 2
by Nicholas Vinen and Tim Blythman
e introduced our ne
igital rea lifier last onth. o
e ll go through
the construction and testing procedures.
33
Self-Contained 3.8GHz Digital Attenuator by Jim Rowe
This digitally programmable RF attenuator module with a built-in microcontroller
can attenuate RF signals from 1MHz to 3.8GHz by 0-31dB in 1dB steps.
38
Techno Talk by Mark Nelson
Forget leaves on the line!
8
The Fox Report by Barry Fox
A farcical system
10
Net Work by Alan Winstanley
A round-up of topical technological issues and trends from the UK and around the
world – from whole-home mesh wireless systems to the latest email clients.
12
Circuit Surgery by Ian Bell
Electronically controlled resistance – Part 2
41
Make it with Micromite by Phil Boyce
Part 40: Simple PicoMite GPS tracker
46
a s Cool eans y ax The agnificent
Flashing LEDs and other engineering temptations – Part 32
50
Audio Out by Jake Rothman
Transformers in audio – Part 3
54
Series, Features and Columns
KickStart by Mike Tooley
art
etting to gri s ith lo
o er o erational a
lifiers
Electronic uilding loc s by Julian Edgar
Selecting and Using Actuators – Part 1
64
Wireless for the Warrior
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Made in the UK.
Written in Britain, Australia,
the US and Ireland.
Read everywhere.
© Electron Publishing Limited 2022
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 November 2022 issue of Practical Electronics will be
published on Thursday, 6 October 2022 – see page 72.
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