Practical
Electronics
Volume 51. No. 12
December 2022
ISSN 2632 573X
Contents
Projects and Circuits
Hummingbird Audio Amplifier by Phil Prosser
This miniature amplifier is nimble, small in size but strong, delivering up to 60W
into 8Ω or 100W into 4Ω.
16
USB Cable Tester – Part 2 by Tim Blythman
Our USB Cable Tester, introduced last month, is ideal for going through piles of
cables and sorting them out – a great first step in diagnosing a fault!
28
SMD Trainer Board by Tim Blythman
36
This simple SMD Trainer project is a great way to practice soldering a variety of
surface-mount devices.
Series, Features and Columns
Techno Talk by Mark Nelson
Giant Boost for Batteries
8
The Fox Report by Barry Fox
From virtual reality to virtue signalling
10
Net Work by Alan Winstanley
12
This month’s Net Work focuses on some energy-saving and monitoring resources,
as well as looking ahead to the future of nuclear fusion.
SMD Soldering Tips & Tricks by Tim Blythman
This article accompanies our SMD Trainer project and provides a lot of detail
to help you become an SMD soldering master.
41
Audio Out by Jake Rothman
Universal single op amp board (optimised for audio electronics) – Part 1
48
Circuit Surgery by Ian Bell
Electronically controlled resistance – Part 4
54
Make it with Micromite by Phil Boyce
Part 42: PicoMite Fingerprint Reader – Part 1
58
Max’s Cool Beans by Max The Magnificent
Flashing LEDs and other engineering temptations – Part 34
62
Regulars and Services
Made in the UK.
Written in Britain, Australia,
the US and Ireland.
Wireless for the Warrior
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Editorial
Soldering surface-mount devices
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PE Teach-In 9
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PE Teach-In 8
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PCBs for Practical Electronics projects
Classified ads and Advertiser index
Next month! – highlights of our next issue of Practical Electronics
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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 January 2023 issue of Practical Electronics will be
published on Thursday, 1 December 2022 – see page 72.
Practical Electronics | December | 2022
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