Articles in this series:
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Techno Talk (August 2020)
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Techno Talk (August 2020)
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Techno Talk (September 2020)
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Techno Talk (September 2020)
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Techno Talk (October 2020)
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Techno Talk (October 2020)
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(November 2020)
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(November 2020)
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Techno Talk (December 2020)
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Techno Talk (December 2020)
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Techno Talk (January 2021)
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Techno Talk (January 2021)
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Techno Talk (February 2021)
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Techno Talk (February 2021)
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Techno Talk (March 2021)
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Techno Talk (March 2021)
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Techno Talk (April 2021)
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Techno Talk (April 2021)
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Techno Talk (May 2021)
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Techno Talk (May 2021)
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Techno Talk (June 2021)
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Techno Talk (June 2021)
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Techno Talk (July 2021)
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Techno Talk (July 2021)
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Techno Talk (August 2021)
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Techno Talk (August 2021)
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Techno Talk (September 2021)
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Techno Talk (September 2021)
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Techno Talk (October 2021)
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Techno Talk (October 2021)
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Techno Talk (November 2021)
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Techno Talk (November 2021)
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Techno Talk (December 2021)
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Techno Talk (December 2021)
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Communing with nature (January 2022)
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Communing with nature (January 2022)
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Should we be worried? (February 2022)
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Should we be worried? (February 2022)
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How resilient is your lifeline? (March 2022)
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How resilient is your lifeline? (March 2022)
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Go eco, get ethical! (April 2022)
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Go eco, get ethical! (April 2022)
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From nano to bio (May 2022)
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From nano to bio (May 2022)
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Positivity follows the gloom (June 2022)
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Positivity follows the gloom (June 2022)
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Mixed menu (July 2022)
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Mixed menu (July 2022)
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Time for a total rethink? (August 2022)
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Time for a total rethink? (August 2022)
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What’s in a name? (September 2022)
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What’s in a name? (September 2022)
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Forget leaves on the line! (October 2022)
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Forget leaves on the line! (October 2022)
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Giant Boost for Batteries (December 2022)
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Giant Boost for Batteries (December 2022)
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Raudive Voices Revisited (January 2023)
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Raudive Voices Revisited (January 2023)
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A thousand words (February 2023)
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A thousand words (February 2023)
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It’s handover time (March 2023)
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It’s handover time (March 2023)
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AI, Robots, Horticulture and Agriculture (April 2023)
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AI, Robots, Horticulture and Agriculture (April 2023)
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Prophecy can be perplexing (May 2023)
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Prophecy can be perplexing (May 2023)
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Technology comes in different shapes and sizes (June 2023)
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Technology comes in different shapes and sizes (June 2023)
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AI and robots – what could possibly go wrong? (July 2023)
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AI and robots – what could possibly go wrong? (July 2023)
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How long until we’re all out of work? (August 2023)
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How long until we’re all out of work? (August 2023)
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We both have truths, are mine the same as yours? (September 2023)
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We both have truths, are mine the same as yours? (September 2023)
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Holy Spheres, Batman! (October 2023)
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Holy Spheres, Batman! (October 2023)
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Where’s my pneumatic car? (November 2023)
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Where’s my pneumatic car? (November 2023)
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Good grief! (December 2023)
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Good grief! (December 2023)
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Cheeky chiplets (January 2024)
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Cheeky chiplets (January 2024)
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Cheeky chiplets (February 2024)
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Cheeky chiplets (February 2024)
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The Wibbly-Wobbly World of Quantum (March 2024)
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The Wibbly-Wobbly World of Quantum (March 2024)
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Techno Talk - Wait! What? Really? (April 2024)
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Techno Talk - Wait! What? Really? (April 2024)
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Techno Talk - One step closer to a dystopian abyss? (May 2024)
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Techno Talk - One step closer to a dystopian abyss? (May 2024)
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Techno Talk - Program that! (June 2024)
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Techno Talk - Program that! (June 2024)
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Techno Talk (July 2024)
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Techno Talk (July 2024)
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Techno Talk - That makes so much sense! (August 2024)
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Techno Talk - That makes so much sense! (August 2024)
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Techno Talk - I don’t want to be a Norbert... (September 2024)
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Techno Talk - I don’t want to be a Norbert... (September 2024)
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Techno Talk - Sticking the landing (October 2024)
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Techno Talk - Sticking the landing (October 2024)
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Techno Talk (November 2024)
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Techno Talk (November 2024)
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Techno Talk (December 2024)
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Techno Talk (December 2024)
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Techno Talk (January 2025)
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Techno Talk (January 2025)
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Techno Talk (February 2025)
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Techno Talk (February 2025)
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Techno Talk (March 2025)
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Techno Talk (March 2025)
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Techno Talk (April 2025)
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Techno Talk (April 2025)
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Techno Talk (May 2025)
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Techno Talk (May 2025)
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Techno Talk (June 2025)
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Techno Talk (June 2025)
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Techno Talk (July 2025)
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Techno Talk (July 2025)
Items relevant to "180-230V DC Motor Speed Controller":
Articles in this series:
Articles in this series:
-
Precision Electronics, Part 1 (November 2024)
-
Precision Electronics, Part 1 (November 2024)
-
Precision Electronics, Part 2 (December 2024)
-
Precision Electronics, Part 2 (December 2024)
-
Precision Electronics, Part 3 (January 2025)
-
Precision Electronics, part one (January 2025)
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Precision Electronics, part one (January 2025)
-
Precision Electronics, Part 3 (January 2025)
-
Precision Electronics, part two (February 2025)
-
Precision Electronics, Part 4 (February 2025)
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Precision Electronics, Part 4 (February 2025)
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Precision Electronics, part two (February 2025)
-
Precision Electronics, part three (March 2025)
-
Precision Electronics, part three (March 2025)
-
Precision Electronics, Part 5 (March 2025)
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Precision Electronics, Part 5 (March 2025)
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Precision Electronics, Part 6 (April 2025)
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Precision Electronics, Part 6 (April 2025)
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Precision Electronics, part four (April 2025)
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Precision Electronics, part four (April 2025)
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Precision Electronics, part five (May 2025)
-
Precision Electronics, Part 7: ADCs (May 2025)
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Precision Electronics, part five (May 2025)
-
Precision Electronics, Part 7: ADCs (May 2025)
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Precision Electronics, Part 8: Voltage References (June 2025)
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Precision Electronics, part six (June 2025)
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Precision Electronics, part six (June 2025)
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Precision Electronics, Part 8: Voltage References (June 2025)
-
Precision Electronics, part seven (July 2025)
-
Precision Electronics, part seven (July 2025)
Items relevant to "Repurposing the Mains Power-Up Sequencer":
Articles in this series:
Items relevant to "Intelligent Dual Hybrid Power Supply,.Part 2":
Articles in this series:
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Practical
Electronics
Volume 54. No. 7
July 2025
ISSN 2632 573X
Contents
Projects and Circuits
Compact OLED Clock/Timer by Tim Blythman
14
This handy, portable, rechargeable device combines a clock, timer and stopwatch and
can display different time zones. It has an internal crystal and incorporates a WiFi time
source, so it is always accurate, even if a leap second occurs.
180-230V DC Motor Speed Controller, part one by John Clarke
34
High-voltage DC motors are commonly used in lathes, treadmills, industrial conveyor
belts and similar equipment. This Speed Controller can control such a motor over a
wide range of speeds, from very slow to maximum, maintaining a constant speed.
Repurposing the Mains Power-up Sequencer by John Clarke
52
Generators and inverters are not always powerful enough to run more than one highcurrent appliance at a time. The Mains Power-Up Sequencer from the February &
March issues can be programmed to do that automatically.
Intelligent Dual Hybrid Power Supply, part two by Phil Prosser
64
Our new Dual Hybrid Supply uses switchmode and linear regulators, so it has very
quiet outputs. They can be used independently or together in series or parallel, all
controlled through a single easy-to-use digital interface.
Series, Features and Columns
The Fox Report by Barry Fox
Robotic mowers are a labour saver, but they take some effort to set up properly.
4
Circuit Surgery by Ian Bell
6
Topics in digital signal processing – Implementing DSP on a microcontroller, part two.
Techno Talk by Max The Magnificent
24
HITL used to stand for hardware-in-the-loop. Now, HITL also stands for human-in-theloop, where human judgement is added to automated systems.
Max’s Cool Beans by Max The Magnificent
Weird & Wonderful Arduino Projects, part 7: predictably random.
26
Precision Electronics, part seven by Andrew Levido
44
Last month, we covered the various sources of analog-to-digital and digital-to-analog
conversion errors. This month, we will focus on analog-to-digital converters (ADCs)
and, as usual, we’ll include a practical example.
Audio Out by Jake Rothman
57
Pretty much all linear amplifier circuit designs these days use the standard long-tailed
pair (LTP) at their input. There’s another way to do it, though, using a complementary
cascode. That method has some advantages, so I decided to give it a try.
Regulars and Services
Made in Australia & the UK.
Written in Britain, Australia,
the USA and Ireland.
Editorial
ChatGPT can analyse circuit diagrams
Reader services – Editorial and Advertising Departments
Subscribe to Practical Electronics and save money
Practical Electronics Back Issue DOWNLOADS – 2024 now available!
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
2
3
33
51
76
79
80
Read everywhere.
© Silicon Chip Publications Pty Ltd 2025
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 2025 issue of Practical Electronics will be
published on Thursday, 3rd of July 2025 (see p80).
Practical Electronics | July | 2025
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