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Practical
Electronics
Volume 52. No. 9
September 2023
ISSN 2632 573X
Contents
Projects and Circuits
GPS-Synchronised Analogue Clock by Geoff Graham
This GPS Clock Driver converts an ordinary wall clock into a highly accurate
timepiece that will keep exact time (within seconds).
18
Mini LED Driver by Tim Blythman
Here’s a handy, small, low-cost module that can drive relatively large 12V white
LEDs from a USB or 5V DC power source.
28
Wide-Range OhmMeter – Part 2 by Phil Prosser
34
This auto-ranging ohmmeter will measure just about any resistance – from a handful of
milliohms to many megohms! Now it’s time to build and test it!
Series, Features and Columns
Techno Talk by Max The Magnificent
We both have truths, are mine the same as yours?
8
The Fox Report by Barry Fox
Cures for online pain and frustration
10
Net Work by Alan Winstanley
Reports on broadband router choices and advice about choosing quality mains
adaptors. Plus, aspects of DC connectors and USB charging are discussed.
12
Make it with Micromite by Phil Boyce
Part 49: PicoMite Smart Light Controller – Part 4
41
Max’s Cool Beans by Max The Magnificent
Arduino Bootcamp – Part 9
44
Audio Out by Jake Rothman
Discrete audio op amp – Part 1
50
Circuit Surgery by Ian Bell
Gyrators
58
Electronic Building Blocks by Julian Edgar
Playing with Bose
63
Regulars and Services
Made in the UK.
Written in Britain, Australia,
the US and Ireland.
Wireless for the Warrior
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NEW! Practical Electronics back issues DOWNLOADS – 2022 now available!
Reader services – Editorial and Advertising Departments
Editorial
Super-accurate analogue clock… Gyr… what?... Need a book? – Part 2
Exclusive Microchip reader offer
Win a Microchip Integrated Graphics and Touch (IGaT) Curiosity Evaluation Kit
PE Teach-In 8
PE Teach-In 9
Teach-In bundle – what a bargain!
Practical Electronics PCB Service
PCBs for Practical Electronics projects
Classified ads and Advertiser index
Next month! – highlights of our next issue of Practical Electronics
2
4
6
7
7
9
27
33
67
68
71
72
Read everywhere.
© Electron Publishing Limited 2023
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 October 2023 issue of Practical Electronics will be
published on Thursday, 7 September 2023 – see page 72.
Practical Electronics | September | 2023
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