Silicon ChipNet Work - August 2023 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Subscriptions: PE Subscription
  4. Subscriptions
  5. Back Issues: Hare & Forbes Machineryhouse
  6. Publisher's Letter: Interested in robots?
  7. Feature: How long until we’re all out of work? by Max the Magnificent
  8. Feature: The Fox Report by Barry Fox
  9. Feature: Net Work by Alan Winstanley
  10. Project: Wide-Range OhmMeter by Phil Prosser
  11. Project: 0-110dB RF Attenuator for Signal Generators by Charles Kosina
  12. Project: SPY-DER A 3D-PRINTED DIY ROBOT by Arijit Das
  13. Project: Universal Battery Charge Controller by John Clarke
  14. Feature: PAS CO2 Air Quality Sensor Module by Jim Rowe
  15. Feature: Circuit Surgery by Ian Bell
  16. Feature: Max’s Cool Beans by Max the Magnificent
  17. Feature: AUDIO OUT by Jake Rothman
  18. Feature: Make it with Micromite by Phil Boyce
  19. PCB Order Form
  20. Advertising Index

This is only a preview of the August 2023 issue of Practical Electronics.

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Articles in this series:
  • (November 2020)
  • Techno Talk (December 2020)
  • Techno Talk (January 2021)
  • Techno Talk (February 2021)
  • Techno Talk (March 2021)
  • Techno Talk (April 2021)
  • Techno Talk (May 2021)
  • Techno Talk (June 2021)
  • Techno Talk (July 2021)
  • Techno Talk (August 2021)
  • Techno Talk (September 2021)
  • Techno Talk (October 2021)
  • Techno Talk (November 2021)
  • Techno Talk (December 2021)
  • Communing with nature (January 2022)
  • Should we be worried? (February 2022)
  • How resilient is your lifeline? (March 2022)
  • Go eco, get ethical! (April 2022)
  • From nano to bio (May 2022)
  • Positivity follows the gloom (June 2022)
  • Mixed menu (July 2022)
  • Time for a total rethink? (August 2022)
  • What’s in a name? (September 2022)
  • Forget leaves on the line! (October 2022)
  • Giant Boost for Batteries (December 2022)
  • Raudive Voices Revisited (January 2023)
  • A thousand words (February 2023)
  • It’s handover time (March 2023)
  • AI, Robots, Horticulture and Agriculture (April 2023)
  • Prophecy can be perplexing (May 2023)
  • Technology comes in different shapes and sizes (June 2023)
  • AI and robots – what could possibly go wrong? (July 2023)
  • How long until we’re all out of work? (August 2023)
  • We both have truths, are mine the same as yours? (September 2023)
  • Holy Spheres, Batman! (October 2023)
  • Where’s my pneumatic car? (November 2023)
  • Good grief! (December 2023)
  • Cheeky chiplets (January 2024)
  • Cheeky chiplets (February 2024)
  • The Wibbly-Wobbly World of Quantum (March 2024)
  • Techno Talk - Wait! What? Really? (April 2024)
  • Techno Talk - One step closer to a dystopian abyss? (May 2024)
  • Techno Talk - Program that! (June 2024)
  • Techno Talk (July 2024)
  • Techno Talk - That makes so much sense! (August 2024)
  • Techno Talk - I don’t want to be a Norbert... (September 2024)
  • Techno Talk - Sticking the landing (October 2024)
  • Techno Talk (November 2024)
  • Techno Talk (December 2024)
  • Techno Talk (January 2025)
  • Techno Talk (February 2025)
  • Techno Talk (March 2025)
  • Techno Talk (April 2025)
  • Techno Talk (May 2025)
  • Techno Talk (June 2025)
Net Work Alan Winstanley Our Net Work columnist observes how Chinese EV makers are queuing up to conquer Europe, AI is becoming ever more humanlike and there’s news of NASA’s ambitions to return soil samples from Mars. R ecently an old, abandoned shipping container holding three Tesla Roadster cars made 13 years ago, was found at a Chinese quayside. The Teslas were reportedly destined for a start-up EV maker to be dismantled and their technology copied, but the EV maker had gone bust and the cars, worth $2m today, were being auctioned off. China’s nascent car makers have seized every opportunity to get a toehold in the global car market, having started by grabbing some well-known brand names. The famous British marque Rover became ‘Roewe’ under Chinese ownership and, as a sign of how rapidly its owners Shanghai Motor (SAIC) have evolved since then, their range now covers everything from a tiny all-electric car (the Roewe Clever), up to some monstrouslooking SUVs, such as the RX-9: https://bit.ly/pe-aug23-ro1 Their website showcases a wealth of vehicle design and production that is seemingly limitless. You can take a virtual tour of these brittle-looking cars online, and the Google Lens app on a smartphone is great for translating Chinese web text into English – see: https://bit.ly/pe-aug23-ro2 Until the 1980s, car ownership in China was unthinkable: according to the Christian Science Monitor, in 1985 the average was one passenger car per six million people. In December 2020’s Net Work I wrote how Chinese-owned SAIC had grabbed the British MG brand to market its own Chinese-built cars, describing themselves as a ‘94-yearold start-up’. As predicted, thanks to their keenly priced EVs, the MG brand has enjoyed stellar growth, both in Britain and overseas. Fast forward 2½ years to today and, according to SMMT statistics, MG has sold in The luxury HiPhi X has TI (Texas Instruments) 2023 about 32,000 units, or micromirror-controlled headlights and on-road night4.1% of the UK car market time warnings. share, 2½ times more than Renault (13,000), with volumes approaching those of mainstream Vauxhall cars (39,000). Tesla sold 18,600 cars, after disrupting the market with major price cuts. Despite the decline of British car brands, we can still claim that Britain’s MG saloons contained the first mainstream digital dashboard nearly 40 years ago, see: https://youtu.be/gH8orI8jdCA HiPhi’s sophisticated dashboard is dominated entirely – preceded only by the dire by three HD screens for managing the car’s controls. and best forgotten electronic dash on the 1976 Aston Martin Hi Phives Lagonda, a favourite of oil sheiks at There’s more to come: back in April, UK Government officials met in Shanghai the time. 1556 FR ABS IP54 enclosures Learn more: hammfg.com/1556 ! w ne Contact us to request a free evaluation sample. uksales<at>hammfg.com • 01256 812812 12 Practical Electronics | August | 2023 A tiny electric Light Utility Vehicle (LUV) has been proposed by Sweden’s Luvly AB. It would be assembled from kits in microfactories. with the CEO of Chinese luxury car maker HiPhi, a brand owned by Chinese group Human Horizons that I mentioned briefly in June’s issue. HiPhi has ambitions to sell their ultra-sophisticated high-end electric cars in Europe, and they ‘expressed hope to see HiPhi cars on the UK streets soon’. Tomorrow’s technology is heading our way and these premium cars show what’s now possible today. The cars are crammed with tech, including LED matrix headlights directed by 2.6 million individually-controlled Texas Instruments digital micromirror devices (DMDs – see: https://bit.ly/pe-aug23-ti), electronic technology that shapes the beam and makes today’s car headlights seem like acetylene-burning carbide lamps in comparison. From what I can gather, their ‘night-vision imaging’ LED lights project warning signs onto the road surface, with features like ‘intelligent pedestrian tracking’, which detect bystanders waiting to cross. Naturally, the dash is dominated by digital screens and the feature list is out of this world. Under the heading of ‘Too silly’, though, must come the idea that its LED matrix lamps can download and display text, emojis and animations. Whether it complies with UK road regulations is doubtful; an early taster is at: https://youtu.be/ mAkIXVnH7sU and you can sign up for news or see more about the HiPhi-X at: www.hiphi.com/hiphi-x This inexorable shift towards electric propulsion is creating a sea-change in the auto market, hampered in Britain by the usual infrastructure problems and bottlenecks. BYD (Build Your Dreams, see Net Work, May 2023) has shifted Practical Electronics | August | 2023 just 84 of their electric Atto 3 SUVs so far, according to SMMT figures. But this EV builder is huge in Asia and has big plans to conquer Europe with their next cars, called the Dolphin and the Seal. The GWM (Great Wall Motor) Ora ‘Funky Cat’ described 18 months ago (see Net Work, January 2022) has sold just 258 so far this year, but Ora has already set its sights on expansion, with a so-far unnamed premium saloon coming in 2024. Some teaser shots are at: https://gwmora.co.uk/nextgwmora/ Dealer appeal New brands like BYD and Ora are slowly and carefully building up a dealership network and, judging by MG’s success, they are in it for the long term. Here in the UK, it feels like owners of fossil-fuelled cars are becoming an endangered species, with all manner of ‘green’ policies making car ownership difficult and increasingly unrewarding; yet EVs are still expensive and, for many, remain impractical to use. Prices of used EVs are finally starting to recover, says Autocar, yet 29 of the top 30 biggest used car price drops in the last six months were still electric vehicles, according to the trade site Car Dealer. Cars are being seen more as ‘white goods’, Heycar’s CEO Karen Hilton is quoted as saying: brand loyalty in Britain is fast disappearing and cars are now being purchased simply because customers ‘need one’, showing little regard to the badge on the hood. This trend will be manna from heaven for Chinese car makers trying to expand into the market. The Internet has played a major role in skewing the way cars are bought and sold. Instead of trawling round showrooms and grabbing brochures, websites such as Heycar, Cinch and Cazoo have sprung up selling cars online, all polished up nicely to look like new. Personally, I find it incredible that consumers would buy an expensive car at arm’s length without trying it first, reassured only by a money-back guarantee – but some people really do. This idea backfired on Cazoo, who over-expanded into Europe and has since shut down all its overseas sales operations. However, not even Rolls-Royce produces a printed brochure now, but when I played with their ‘online configurator’ I was greeted with a ‘Something went wrong’ pop-up that redirected me to a ‘2D Experience’ instead. Even Rolls-Royce gets online sales wrong sometimes. At the other end of the scale, another emerging segment is the ‘NEV’ or Neighbourhood Electric Vehicle, tiny electric cars and mini-trucks capable of no more than 25 mph for zipping round town, though these have yet to appear in Britain (where new urban 20mph speed limits and punitive emissions charges are proving highly unpopular). The Ed and I were just joking about how a flat-pack car would be good for use around town, when news arrived of a concept EV that is just that – a brilliant idea from Sweden (where else?). The ‘Luvly O’, which is the brainchild of Luvly AB, is classed as an ‘LUV’ or light utility vehicle. Designed from the start to be lightweight but tough and safe, the tiny, spartan two-seater has urban life firmly in mind and would be ideal for nipping around congested towns. The Luvly O aims to be 13 The Mars Sample Return Mission (MSR) would see samples of Martian rocks and sediment return to Earth for analysis, ten years from now. (Image: NASA/JPL-Caltech) Bing Chat is a conversational system integrated with Microsoft’s search engine that allows users to talk to its AI chatbot rather than simply filling out search queries. (Bing Chat’s own definition of itself.) sustainable and fully recyclable and uses just two small batteries giving a range of 60+ miles. Naturally, it would communicate with a Luvly app on the driver’s smartphone. Unlike Chinese NEVs, the Luvly O could indeed be delivered as flat packs, IKEA style, although not to the end-user (no confusing instructions to deal with, then!), but in kit form to regional microfactories for local assembly. The vehicle – if it ever sees production – is a few years away yet and would cost about €10,000 (£8,600). You can sign up for newsletters and find more details at: www.luvly.se Artificial sweeteners Artificial intelligence (AI) is never far from the news and there’s no escaping the impact that AI now has on mundane everyday activities. There aren’t enough expensive human beings (or phone lines) to offer us a personal customer service anymore, so many of us have been conditioned into using online ‘chat’ instead. Terminal-style chat may be awkward and robotic but there might at least be a human being at the other end, maybe halfway round the world or working from home in a bedroom somewhere. Humanoid chatbots are increasingly relying on AI to try holding intelligent conversations with us, 14 and a lot of AI-crafted content is now indistinguishable from human-generated material. The paradox is that, in trying to emulate a human response, AI-powered chat seems to de-humanise the experience even more. The advent of ChatGPT – an OpenAI chatbot programmed to converse naturally – has caught the public’s imagination and has been covered extensively by others. You can try it at: https://chat.openai.com – note that the site openly admits that it may sometimes generate wrong information and harmful or biased content. Intelligent chatbots do have their uses though, and when they work efficiently, they can save time and hassle – for example, when I used their own chatbot to close an OpenAI account. Elsewhere, Microsoft is finally killing off Cortana, its unloved and largely forgotten voice assistant. Having already abandoned mobile applications, Cortana as a standalone app will silently disappear from Windows 10 and 11 towards the end of this year, a measure Microsoft quietly announced in an earlier bulletin, see: https://tinyurl.com/mr323r4e In its place, new AI-powered search technology is being used that gives Bing search results an altogether friendlier, chatty style. I must admit that using Bing’s AI in Microsoft Edge to search the web makes a pleasant change from punching in search phrases and trawling mindlessly through pages of hyperlinks and paid-for ads. Waiting in the wings is Windows Copilot, a centralised AI tool coming to Windows 11 that promises to ‘help people easily take action and get things done’. Bing and ChatGPT plugins will be embedded into the Windows OS, and Windows Copilot promises (at last) to offer plain English AI-generated answers to our everyday questions, acting like a more intelligent Help screen. Copilot is already making its way into Microsoft Office 365. Is there life on Mars? Back in Net Work, October 2020, I wrote that NASA had launched a space mission to Mars hoping to fly a small helicopter called Ingenuity in the very thin Martian atmosphere, which has just 1% of the Earth’s density. This feat would be the first such powered flight made on another planet. The helicopter’s mothership, called Perseverance, is a mobile laboratory bristling with sophisticated geological test equipment and it landed successfully on Mars in February 2021. Ingenuity was then released to fly ahead as a ‘scout’ for Perseverance. Although Ingenuity was expected to fly just five missions as a proof-of-concept demonstrator, the hovering craft has exceeded all expectations and has now celebrated more than 50 successful flights, travelling a total of nearly 12km. NASA engineers have learned how to exploit gruelling weather patterns, for example, to let frozen components thaw out in the sun again, after the helicopter has taken a nap in hibernation mode. The fascinating story of some of Ingenuity’s perilous journeys is recounted by NASA engineers at: https://bit.ly/pe-aug23-nasa Looking to the future, an even greater challenge is that of returning Martian soil samples to Earth, and for this NASA has partnered with ESA, the European Space Agency, as part of the highly ambitious Mars Sample Return (MSR) project. The scale of the technology needed is astonishing: samples of Martian rocks and sedimentary deposits, contained in small tubes, would be gathered together at a location on Mars Practical Electronics | August | 2023 Virgin Galactic’s twin-bodied space carrier plane VMS Eve releases the VMS Unity space plane on a successful test flight prior to going commercial. (Image: Virgin Galactic) and a craft called the Sample Return Lander would eventually land with extreme precision nearby. The lander would contain a small rocket – the two-stage Mars Ascent Vehicle (MAV) – into which the sample tubes would be loaded by a Perseverance-type rover, helped by two Sample Recovery Helicopters. Ten such soil sample tubes have already been curated by Perseverance, patiently awaiting their collection some time in the distant future. In another space programme first, the MAV rocket would then be launched from Mars back into orbit, to rendezvous with an Earth Return Orbiter (ERO) launched separately from Earth by the European Space Agency. It would be the first interplanetary spacecraft to capture an object orbiting around another planet and make a full round trip to Mars and back again. For this to happen, NASA’s Capture, Containment, and Return System (CCRS) would ‘capture the Martian sample container in orbit, double-seal it in a clean vessel, and integrate it into the Earth Entry System, which would safely return the samples to Earth’s surface’, NASA says. The feasibility of this highly ambitious programme will be scrutinised by an independent review board this year. If it goes ahead, a target of the early 2030s has been slated for the MAV launching from the red planet, carrying its priceless Martian booty back to Earth. I hope a future Net Work writer will be able to report on its success, but in the meantime you can learn more at: https://mars.nasa.gov/msr Galaxy Invader In other space news: sadly, Virgin Orbit’s efforts to re-finance its 747-based LEO launcher were unsuccessful, leaving the bankrupt company with no choice but to break up and sell off the company’s assets – proof that space is still hard to do. There is better news from Virgin Galactic’s space tourism programme, though (Net Work, July 2021), as the company has successfully completed a spaceflight of its twin-bodied carrier plane ‘mothership’, the VMS Eve, in readiness for the company’s first commercial flight. After being transported into the upper atmosphere by the plane, the re-usable orbital spaceplane will reach an altitude of 80km, carrying its passengers and crew. The craft then folds in two, Terrington Components • Project boxes designed and manufactured in the UK. • Many of our enclosures used on former Maplin projects. • Unique designs and sizes, including square, long and deep variaaons of our screwed lid enclosures. • Sub-miniature sizes down to 23mm x 16mm, ideal for IoT devices. MADE IN BRITAIN www.terrington-components.co.uk | sales<at>terrington-components.co.uk | Tel: 01553 636999 Practical Electronics | August | 2023 15 Under construction: Sierra Space’s Dream Chaser is the world’s only winged commercial spaceplane, set to supply their privately owned Orbital Reef space station. offering passengers a glimpse of space and the planet below, before gliding back to earth. Meanwhile, US manufacturer Sierra Space is a commercial space company currently constructing what will be the world’s only winged commercial spaceplane, the ‘Dream Chaser’. The craft is intended to resupply the International Space Station, and would land back on Earth on ‘compatible airport runways’. (Fun fact: NASA’s original 1980s Space Shuttle missions would land back on airstrips either in Florida or California, but one backup emergency landing site was none other than Doncaster Sheffield airport in England, which had one of the longest runways in the country. My parents were married in Finningley church, by the same RAF runway.) The first Dream Chaser space plane was successfully powered up for the first time at the end of May. Sierra Space is also building the backronym-titled LIFE habitat (Large Integrated Flexible Environment), described as a ‘modular, three-storey commercial habitation and science platform designed for low-earth orbit’. The Dream Chaser spaceplane and the LIFE platform are key elements in their proposed ‘Orbital Reef’ space station, the first commercially owned and operated private space station, described as a ‘mixed-use business park in lowearth orbit’, being developed by Sierra Space and Blue Origin, the space corporation owned by Jeff Bezos. It is slated Amazon Kuiper’s smallest and lowest-cost satellite Internet terminal will measure just seven inches square. 16 to be operational by 2027. As they say, remote working will never be the same again, and you can learn more about the Orbital Reef at: www.sierraspace.com Finally, this month, on the LEO broadband front, in a market dominated by SpaceX’s Starlink service, Amazon’s long-overdue Kuiper program has finally received the green light from the US Federal Trade Commission. The service, first mentioned four years ago in Net Work, will eventually see a constellation of some 3,200 LEO satellites launched in 77 missions, to beam Internet services back down to earth. It will harness Amazon Web Services (AWS), their managed cloud-computing platform, which is used by everyone from small operators all the way up to the UK Government. Amazon expects to start building five satellites a day in its own facility and is compelled to have at least half of the satellite constellation operational by July 2026. The aim is to start connecting early adopters by the end of 2024 and a range of terminals will be offered. The fastest service is expected to offer a speed of 1Gbps for high-bandwidth users, but a small 7-inch array may suit home users or travellers. That’s all for this month’s Net Work – you’ll find all the above links ready-made for you in the Net Work blog on the PE website at: www.electronpublishing.com The author can be reached at: alan<at>epemag.net Practical Electronics | August | 2023