Practical
Electronics
Volume 52. No. 7
July 2023
ISSN 2632 573X
Contents
Projects and Circuits
MIDI Spectral Sound Synthesiser by Jeremy Leach
16
This advanced synthesiser is a full-blown instrument capable of forming rich, detailed
sounds. It’s easy to build and can be hooked up to any MIDI-compatible device.
Multimeter Checker/Calibrator by Tim Blythman
29
It’s amazing how handy even the cheapest multimeters can be – but, are they
accurate? This project can verify their accuracy, calibrate them and adjust for drift.
MOS Air Quality Sensors by Jim Rowe
We investigate some of the currently available metal oxide semiconductor sensor
modules, what they offer and how to use/interface them with an Arduino Uno.
Series, Features and Columns
36
Techno Talk by Max The Magnificent
AI and robots – what could possibly go wrong?
8
The Fox Report by Barry Fox
Got a sec?
10
Net Work by Alan Winstanley
Reports on Internet-enabled weather station, some ‘dark patterns’ in PC software
and flags up more online services that have been shelved by their providers.
12
KickStart by Mike Tooley
Part 12: Your first ‘scope
42
Circuit Surgery by Ian Bell
Diode power circuits and ideal diode controllers
51
Max’s Cool Beans by Max The Magnificent
Arduino Bootcamp – Part 7
56
Audio Out by Jake Rothman
Potentiometer scratching – Part 2
62
Regulars and Services
Wireless for the Warrior
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Reader services – Editorial and Advertising Departments
Editorial
Check your meter
Exclusive Microchip reader offer
Win a Microchip Explorer 16/32 Development Board
PE Teach-In 9
Practical Electronics PCB Service
PCBs for Practical Electronics projects
Classified ads and Advertiser index
Next month! – highlights of our next issue of Practical Electronics
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50
70
71
72
Made in the UK.
Written in Britain, Australia,
the US and Ireland.
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 August 2023 issue of Practical Electronics will be
published on Thursday, 6 July 2023 – see page 72.
Practical Electronics | July | 2023
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