Practical
Electronics
Volume 52. No. 6
June 2023
ISSN 2632 573X
Contents
Projects and Circuits
Arduino Programmable Load by Tim Blythman
16
This Programmable Load uses an Arduino shield that is easy to understand, build
and operate. It can be controlled manually or automated to suit your application.
500W Power Amplifier – Part 3 by John Clarke
To finish our 500W Amplifier we add the power supply and assemble all the
modules and parts in the enclosure, wire it up and check that it works properly.
21
High-Power Buck-Boost LED Driver by Tim Blythman
There are some very bright, low-cost LED panels available, and this project is
the answer to the question, ‘how do I drive them?’.
32
CJMCU-7620 Gesture Recognition Module by Jim Rowe
40
Experiment with sensing and recognising gestures made with your hands using this
small, relatively low-cost module that can be hooked up to an Arduino or Micromite.
Series, Features and Columns
Techno Talk by Max The Magnificent
Technology comes in different shapes and sizes
8
Net Work by Alan Winstanley
This month’s Net Work examines practical problems with online payments, and
investigates some ‘dark patterns’ that try to manipulate our online behaviour.
10
Max’s Cool Beans by Max The Magnificent
Arduino Bootcamp – Part 6
45
Circuit Surgery by Ian Bell
Comparator circuits
51
Make it with Micromite by Phil Boyce
Part 47: A PicoMite Smart-light Controller – Part 2
56
Audio Out by Jake Rothman
Potentiometer scratching – Part 1
63
PE hands-on product review by Julian Edgar
EEVBlog 121GW multimeter
66
Regulars and Services
Made in the UK.
Written in Britain, Australia,
the US and Ireland.
Wireless for the Warrior
Subscribe to Practical Electronics and save money
NEW! Practical Electronics back issues DOWNLOADS – 2022 now available!
Reader services – Editorial and Advertising Departments
Editorial
Powerful projects… Scratching a living from audio… Looking for a meter?
Exclusive Microchip reader offer
Win a Microchip Microchip CryptoAuth Trust Platform Development Kit
PE Teach-In 8
Teach-In bundle – what a bargain!
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
2
4
6
7
7
9
20
39
62
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 July 2023 issue of Practical Electronics will be
published on Thursday, 1 June 2023 – see page 72.
Practical Electronics | June | 2023
1
| 
