Practical
Electronics
Volume 53. No. 8
August 2024
ISSN 2632 573X
Contents
Projects and Circuits
LC and ESR Meter by Steve Matthysen
16
This enhancement to our Wide-Range Digital LC Meter (June 2019) adds capacitor
ESR measurement – useful for diagnosing faulty equipment because increasing ESR
over time is one of the most common ways electrolytic capacitors fail.
WebMite by Geoff Graham with firmware by Peter Mather
28
What happens when the PicoMite meets the web? Find out with this powerful project
that combines a Raspberry Pi Pico with MMBasic, Wi-Fi and Internet connectivity.
We put it to good use in this month’s Watering System Controller
WebMite-based Watering System Controller by Geoff Graham
34
This advanced Watering System Controller does it all. It can change the watering
schedule depending on the seasons, check the weather forecast before watering and
alert you to a burst pipe or blocked sprinkler. Best of all, it’s easy to set up and use.
Series, Features and Columns
Techno Talk by Max The Magnificent
That makes so much sense!
8
Net Work by Alan Winstanley
10
Reports on passkeys to improve online security and eliminate password logins, plus
the transfer of data to a new phone – some hints and tips.
Circuit Surgery by Ian Bell
Topics in digital signal processing – the frequency domain
44
Audio Out by Jake Rothman
Switching in audio equipment – Part 3
48
Max’s Cool Beans by Max The Magnificent
Arduino Bootcamp – Part 20
52
Teach-In 2024 – Learn electronics with the ESP32 by Mike Tooley
Part 6 – the ESP32 as a Wi-Fi Access Point
60
Wireless for the Warrior
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Reader services – Editorial and Advertising Departments
Editorial
Exciting news!
Exclusive Microchip reader offer
Win a Microchip PolarFire SoC Discovery Kit
PE Teach-In 9
Teach-In bundle – what a bargain!
PE Teach-In 8
Classified ads and Advertiser index
Practical Electronics PCB Service
PCBs for Practical Electronics projects
Next month! – highlights of our next issue of Practical Electronics
2
4
6
7
7
Regulars and Services
9
27
33
43
69
70
72
Made in the UK.
Written in Britain, Australia,
the US and Ireland.
Read everywhere.
© Electron Publishing Limited 2024
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 September 2024 issue of Practical Electronics will be
published on Thursday, 1 August 2024 – see page 72.
Practical Electronics | August | 2024
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