Silicon ChipTechno Talk - July 2020 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Subscriptions: PE Subscription
  4. Subscriptions: PicoLog Cloud
  5. Publisher's Letter: Publisher's Statement
  6. Publisher's Letter
  7. Feature: Techno Talk by Mark Nelson
  8. Feature: Net Work by Alan Winstanley
  9. Back Issues: Net Work by Alan Winstanley
  10. Project: Speech Synthesiser with the Raspberry Pi Zero by Tim Blythman
  11. Project: AD584 Precision Voltage References by Jim Rowe
  12. Project: AM/FM/CW Scanning HF/VHF RF Signal Generator by Andrew Woodfield
  13. Project: High-current Solid-state 12V Battery Isolator by Bruce Boardman
  14. Feature: Circuit Surgery by Ian Bell
  15. Feature: AUDIO OUT by Jake Rothman
  16. Feature: Make it with Micromite by Phil Boyce
  17. Feature: PICn’Mix by Mike Hibbett
  18. Feature: Max’s Cool Beans by Max the Magnificent
  19. Feature: Electronic Building Blocks by Julian Edgar
  20. PCB Order Form
  21. Advertising Index

This is only a preview of the July 2020 issue of Practical Electronics.

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Articles in this series:
  • Techno Talk (July 2020)
  • Techno Talk (July 2020)
  • Techno Talk (August 2020)
  • Techno Talk (August 2020)
  • Techno Talk (September 2020)
  • Techno Talk (September 2020)
  • Techno Talk (October 2020)
  • Techno Talk (October 2020)
  • (November 2020)
  • (November 2020)
  • Techno Talk (December 2020)
  • Techno Talk (December 2020)
  • Techno Talk (January 2021)
  • Techno Talk (January 2021)
  • Techno Talk (February 2021)
  • Techno Talk (February 2021)
  • Techno Talk (March 2021)
  • Techno Talk (March 2021)
  • Techno Talk (April 2021)
  • Techno Talk (April 2021)
  • Techno Talk (May 2021)
  • Techno Talk (May 2021)
  • Techno Talk (June 2021)
  • Techno Talk (June 2021)
  • Techno Talk (July 2021)
  • Techno Talk (July 2021)
  • Techno Talk (August 2021)
  • Techno Talk (August 2021)
  • Techno Talk (September 2021)
  • Techno Talk (September 2021)
  • Techno Talk (October 2021)
  • Techno Talk (October 2021)
  • Techno Talk (November 2021)
  • Techno Talk (November 2021)
  • Techno Talk (December 2021)
  • Techno Talk (December 2021)
  • Communing with nature (January 2022)
  • Communing with nature (January 2022)
  • Should we be worried? (February 2022)
  • Should we be worried? (February 2022)
  • How resilient is your lifeline? (March 2022)
  • How resilient is your lifeline? (March 2022)
  • Go eco, get ethical! (April 2022)
  • Go eco, get ethical! (April 2022)
  • From nano to bio (May 2022)
  • From nano to bio (May 2022)
  • Positivity follows the gloom (June 2022)
  • Positivity follows the gloom (June 2022)
  • Mixed menu (July 2022)
  • Mixed menu (July 2022)
  • Time for a total rethink? (August 2022)
  • Time for a total rethink? (August 2022)
  • What’s in a name? (September 2022)
  • What’s in a name? (September 2022)
  • Forget leaves on the line! (October 2022)
  • Forget leaves on the line! (October 2022)
  • Giant Boost for Batteries (December 2022)
  • Giant Boost for Batteries (December 2022)
  • Raudive Voices Revisited (January 2023)
  • Raudive Voices Revisited (January 2023)
  • A thousand words (February 2023)
  • A thousand words (February 2023)
  • It’s handover time (March 2023)
  • It’s handover time (March 2023)
  • AI, Robots, Horticulture and Agriculture (April 2023)
  • AI, Robots, Horticulture and Agriculture (April 2023)
  • Prophecy can be perplexing (May 2023)
  • Prophecy can be perplexing (May 2023)
  • Technology comes in different shapes and sizes (June 2023)
  • Technology comes in different shapes and sizes (June 2023)
  • AI and robots – what could possibly go wrong? (July 2023)
  • AI and robots – what could possibly go wrong? (July 2023)
  • How long until we’re all out of work? (August 2023)
  • How long until we’re all out of work? (August 2023)
  • We both have truths, are mine the same as yours? (September 2023)
  • We both have truths, are mine the same as yours? (September 2023)
  • Holy Spheres, Batman! (October 2023)
  • Holy Spheres, Batman! (October 2023)
  • Where’s my pneumatic car? (November 2023)
  • Where’s my pneumatic car? (November 2023)
  • Good grief! (December 2023)
  • Good grief! (December 2023)
  • Cheeky chiplets (January 2024)
  • Cheeky chiplets (January 2024)
  • Cheeky chiplets (February 2024)
  • Cheeky chiplets (February 2024)
  • The Wibbly-Wobbly World of Quantum (March 2024)
  • The Wibbly-Wobbly World of Quantum (March 2024)
  • Techno Talk - Wait! What? Really? (April 2024)
  • Techno Talk - Wait! What? Really? (April 2024)
  • Techno Talk - One step closer to a dystopian abyss? (May 2024)
  • Techno Talk - One step closer to a dystopian abyss? (May 2024)
  • Techno Talk - Program that! (June 2024)
  • Techno Talk - Program that! (June 2024)
  • Techno Talk (July 2024)
  • Techno Talk (July 2024)
  • Techno Talk - That makes so much sense! (August 2024)
  • Techno Talk - That makes so much sense! (August 2024)
  • Techno Talk - I don’t want to be a Norbert... (September 2024)
  • Techno Talk - I don’t want to be a Norbert... (September 2024)
  • Techno Talk - Sticking the landing (October 2024)
  • Techno Talk - Sticking the landing (October 2024)
  • Techno Talk (November 2024)
  • Techno Talk (November 2024)
  • Techno Talk (December 2024)
  • Techno Talk (December 2024)
  • Techno Talk (January 2025)
  • Techno Talk (January 2025)
  • Techno Talk (February 2025)
  • Techno Talk (February 2025)
  • Techno Talk (March 2025)
  • Techno Talk (March 2025)
  • Techno Talk (April 2025)
  • Techno Talk (April 2025)
  • Techno Talk (May 2025)
  • Techno Talk (May 2025)
  • Techno Talk (June 2025)
  • Techno Talk (June 2025)
  • Techno Talk (July 2025)
  • Techno Talk (July 2025)
Silly stuff for the silly season Techno Talk Mark Nelson In these troubled times we all need a chuckle or two, so I thought we might examine some of the bizarre electronic products put on sale by some zany sellers. Or maybe they are deadly serious and it’s their customers who are the outlandish ones. You be the judge while I entertain you with some playful teasing. W ith high summer nearly upon us, how about some gardening ideas for electronicists? If that sounds crazy or off-topic, I invite you to consider a new twist to your ‘practical electronics’ hobby. It could even open your mind to a totally different outlook on ‘mindfulness’. Back in 2018, a BBC television documentary broke the news that the Prince of Wales regularly communicated with the plants in his garden. ‘I happily talk to the plants and trees, and listen to them,’ explained Prince Charles, adding that talking to plants kept him ‘relatively sane’. What the plants said back to him was not revealed – for obvious reasons – but now you can find out (in a manner of speaking). I make the qualification, ‘in a matter of speaking’, because garden plants do not exactly speak, but ‘sing’ instead. Perhaps, disappointingly, they do not sing out loud in an audible kind of way (be grateful; you might not like their choice of music). Neverthless, you can now buy several different biofeedback devices that fully enable you to ‘listen to the music of plants’. It’s only a matter of time before someone reverse-engineers one of these gizmos and works up a DIY project for this magazine. Sales pitch Probably the slickest and glitziest sales pitch is that of Data Garden (www. datagarden.org), which invites you to ‘connect to nature through sound’ by way of its Plantwave technology. Plantwave uses electronic hardware that is paired wirelessly from a pot plant using a mobile app to translate biodata from plants into music played from your phone. The positively lush website explains that the company also makes immersive plant music installations for museums and festivals, produces interspecies concerts (pairing musical artists with plants) and leads guided meditation providing wellness services with plant music. Even more ambitious is Music of the Plants (www.musicoftheplants.com), which uses high-conductivity electrodes connected to your favoured plant to Practical Electronics | July | 2020 drive a music synthesiser – offering a choice of root note (!) and a choice of scale (major, minor, harmonic minor, pentatonic, blues, Dorian, Phrygian, Lydian, healing, Japanese folk, Chinese, Damanhurian, Native American, Indian, Arabic, Persian or chromatic). Even better, their gadgets are encased in attractive bamboo-wood housings. Another eco-friendly bamboo-wood gadget is Plants Play (www.plantsplay. com). Branded with the slogan ‘Nature Live’, this is a wearable device that allows you to listen to the music generated by plants and trees. Through two electrodes settled on the leaves, Plants Play converts electrical plant variations into musical notes, and sends them by Bluetooth on your smartphone. Fundamentally similar is the Canadian PLANTchoir product (https://plantchoir. com), except this also allows you to record the music that your garden friends generate. Pitched for both domestic and business use, the product is promoted as being suitable for garden centres and floral shops, yoga and pilates studios, massage therapy studios, as well as acupuncture, chiropractic and other therapeutic settings. Other beneficiaries include day spas, medi-spas, nail and hair salons, together with day care, and Montessori and primary school establishments. Fabulous! But I must warn you that serene wellness comes at a price and you’re looking at three-digit price tags. Spoiler warning Is this explosion of wellness for real or is it all a load of bovine byproduct? Thanks to the HowStuffWorks website, I can reveal it’s utter tosh (https:// bit.ly/pe-jul20-daisy). This sober assessment quotes plant physiologist Dr Monica Gagliano, associate professor in the School of Biological Sciences at the University of Western Australia, as saying: ‘Simply put, the machines that translate the ‘biofeedback’ of plants into music have nothing scientific about them — the whole story has nothing to do with science or the sound of plants.’ For the techies among us, she adds: ‘The apparatus used in many of these instances is a simple multimeter measuring the electrical impedance of the plant. The multimeter then transforms those electrical signals into notes using a sound chip, like those sound cards in your computer, which is how the sounds make sense to our human ears.’ What a disappointing let-down! Electrical spaghetti More plant husbandry matters now, or maybe that should be more ‘market garden’ related than ‘domestic back garden’. No matter – the subject is ‘spaghetti’ and as soon as anyone mentions spaghetti, my mind flits immediately to the superb BBC Panorama report on a bumper Swiss spaghetti harvest, narrated by the authoritative Richard Dimbleby (father of David and Jonathan). To see what I mean, take a peep at: https://youtu.be/ tVo_wkxH9dU and only afterwards view https://youtu.be/MEqp0x6ajGE. You really must do this if you didn’t see it when it was broadcast back in 1957. Say the same word ‘spaghetti’ to many electronicists and they will reply: ‘Oh yes, systoflex!’.This was a rather inflexible (and sticky!) kind of fabric tubing impregnated with something like shellac varnish that you used to slip over exposed wiring and component leads before far more flexible coloured neoprene or PVC plastic tubing replaced it. Dedicated restorers of vintage wireless receivers either use something similar made of polyester and sold by CPC as ‘braided sleeving’ or else buy shoelaces and remove the inner filling. But was its name systoflex or sistoflex? Apparently both – according to the 15 January 1909 edition of The Electrician magazine, the firm of Spicer Brothers had just introduced its ‘Sistoflex’ trademarked product range of insulating materials, which subsequent advertisements mentioned as including flexible insulated tubing. However, the alternative spelling with a ‘y’ appears in British wireless magazines as early as 1926, so who made Systoflex and how did they get away with using such a similar-sounding name? I have no idea but maybe readers can come to the rescue! 9