Silicon ChipNet Work - December 2021 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Subscriptions: PE Subscription
  4. Subscriptions: PicoLog Cloud
  5. Back Issues: PICOLOG
  6. Publisher's Letter
  7. Feature: The Fox Report by Barry Fox
  8. Feature: Techno Talk by Mark Nelson
  9. Feature: Net Work by Alan Winstanley
  10. Project: Easy-to-build Digital AM/FM/SW Receiver by Charles Koslna
  11. Project: Balanced Input and Attenuator for the USB by Phil Prosser
  12. Project: Mini Digital Volt/ Amp Panel Meters by Jim Rowe
  13. Feature: Max’s Cool Beans by Max the Magnifi cent
  14. Feature: KickStart by Mike Tooley
  15. Feature: Circuit Surgery by Ian Bell
  16. Feature: AUDIO OUT by Jake Rothman
  17. Feature: Electronic Building Blocks by Julian Edgar
  18. PCB Order Form
  19. Advertising Index

This is only a preview of the December 2021 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 This month’s Net Work brings you the latest topical news about technology and trends from the world of the Internet and beyond. A sk an Amazon shopper the checkout phase I pressed the Smile button in Firefox, the Smile donation was triggered. Readers might need to double-check this in their own browser. It costs nothing to make a seamless donation this way, so if you are a regular Amazon shopper Google’s Glass for Enterprise is a micro heads-up display that Amazon’s Smile and have a charitable builds on earlier models. Another service offered by Amazon. cause in mind, why Fast forward to today, and Google co.uk, which is less well advertised, not check if the charity has signed up is Amazon Smile, where Amazon will to Amazon Smile and activate this Glass is alive and kicking in the form of a wearable enterprise version for automatically donate a small portion option on your account. use in industry and commerce. The (0.5%) of your eligible purchases to Smart glass heads-up fascinating Android-powered Glass Enyour chosen charity, at no extra cost to Readers with long memories would terprise has 3GB of memory and 32GB yourself. The listed (UK) charities must have to go all the way back to Net of Flash memory, dual-band Wi-Fi, be registered with the Charities ComWork, October 2013 to find a story an 8MP camera, a 640 × 480 micro mission and signed up to the Amazon about Google Glass, an innovation that screen, a mono speaker, three nearSmile programme. I had no problem brought hands-free data to users in the field beam-forming microphones, and locating a smaller, less well-known form of a tiny head-up display carried plenty more besides. Google Glass is charity that I’ve adopted following a on a spectacle frame. finding new roles in logistics, producfamily event this year. Amazon says Google Glass was a tiny projector tion, maintenance and medicine as a it has donated nearly £11m ($14 m) to fitted to one arm of special lens-free way of presenting data and information date in the UK alone, and nearly £230m glasses, which sported a tiny acryl- to its wearers, leaving them hands-free ($315m) worldwide. So far, mine has ic prism that acted as a micro screen to get on with their job. For example, benefitted by the grand sum of 46p, that users could focus on with their a repair technician could view mabut it’s a start! operative eyeball. I wrote that Google chinery diagrams ‘on screen’ in real The latest mobile Amazon ShopGlass would enable the wearer to check time without having to thumb through ping apps for iOS and Android are their phone through Bluetooth, access a manual or scroll through a laptop Amazon Smile-aware, so simply the web or connect to Wi-Fi, check or tablet. A YouTube walk-through tap on ‘Amazon Smile’ within the navigation directions on a display (https://youtu.be/5IK-zU51MU4) shows Programmes & Features menu or Setor interact with the device’s built-in that when coupled with augmented tings to enable it. Desktop PC users camera. Sound was transmitted through reality software, these devices could can donate by shopping at smile. a bone-conducting transducer. Perhaps assist humans with all manner of roles amazon.co.uk (it’s important to start consumers weren’t ready for this quan- in the future. A tantalising taster of from this URL when shopping). A tum leap in Internet paraphernalia, as how this might work is shown at: Smile bookmark button can also be the product quietly disappeared, but https://youtu.be/dVzfYDaWbZc dragged onto the web browser menu not before Google gleaned a lot of pracFor everyday Internet users who fancy bar; I discovered once or twice that if tical know-how from the project prior the idea of wearable smart glasses, there I’d forgotten to enter smile.amazon. to re-purposing it for industry. are a few choices in this emerging market. co.uk when starting out, then if during Ray-Ban recently launched its first generation ‘Stories’ smart glasses in a variety of classic Ray-Ban styles. Priced at £299, they come in various colours as well as polarised and graduated lenses (prescription lenses are also available), and they connect via Bluetooth to an app hosted on the wearer’s smartphone. The Amazon Smile will donate 0.5% of eligible purchases to your choice of charity, at no extra glasses are mainly intended to capture cost to you. Note the ‘Smile’ bookmark button. what the Amazon logo – often seen on cartons that drop onto our doorstep – means to them and they invariably say, ‘it’s a smiley’. However, Amazon’s strapline was at one time, Everything from A to Z and the ‘smile’ is actually an arrow pointing from A to Z in the word ‘Amazon’. See the interesting timeline of Amazon’s logo development at: https://bit.ly/pe-dec21-amz 12 Practical Electronics | December | 2021 may be enough to finally tempt some TV stick-in-the-muds onboard, with packages starting from £13 a month (variable) for the 43-inch package, with Netflix bundled in for 18 months. There are reams of small print worth digesting, and more details are at: www.sky.com/glass (Left) Ray-Ban’s Stories smart sunglasses connect to a Facebook app to record images and video clips; (Right) The ‘Capture’ LED warns those close by that the RayBan glasses are recording. photos, 30-second video clips or carry audio from phone calls. Ray-Ban Stories smart glasses integrate tightly with Facebook, via the Facebook View app. Someone else’s spectacles secretly recording you might feel a bit creepy, and Facebook goes to some lengths to highlight the privacy aspects of these devices and remind wearers of their responsibilities. Facebook’s over-simplified privacy policy covering these devices is at: https://bit.ly/pe-dec21-fb The policy flags up the tiny ‘capture’ LED that supposedly warns anyone in the immediate vicinity that the glasses are recording. However, if it’s under bright sunlight (they are sunglasses after all), the capture LED may not be noticeable at all – as Facebook says, ‘[the capture LED is so] you won’t catch anyone near you off guard.’ More details are at: https://bit.ly/pe-dec21-rb As an alternative, audio brand Bose offers their ‘Audio sunglasses’ with built-in sound but none of the smart gadgetry, see further details here: https://bit.ly/pe-dec21-bose Amazon.com is marketing its $250 second-generation Echo Frames Smart Glasses (not yet available in the UK) with microphones (but no cameras) for use with Alexa, and they are also available with prescription lenses. Amazon’s blurb can’t resist having a dig: ‘Designed to protect your privacy – Amazon is not in the business of selling your personal information to others. Microphones are designed to respond to the voice of the person wearing the frames and turn off with the double-press of a button.’ Amazon also sells a few obscure brands of smart glasses that include a camera, such as ‘OHO 4K Ultra HD Water Resistance Video Sunglasses, Sports Action Camera with Built-in Memory’. now benefit from a new class of wearable technology. The Orcam MyEye is a small scanner device that clips magnetically onto the side of spectacles, and will OCR text and convert it to speech. It’s demonstrated here: https://youtu.be/bbEEmc0xtvw This technology is eye-wateringly expensive though: the RNIB (Royal National Institute for the Blind) website lists MyEye at £3,500 + VAT. A lower-cost, handheld device is the Orcam Read, which has laser guides designed to help with reading. It may appeal to those with dyslexia or anyone whose eyeballs and brain are simply suffering from ‘reading fatigue’. Street prices are around £1,500. More details are at: orcam.com Aibo – not such a good boy? As wearable technology continues to improve and costs fall, smart glasses with built-in cameras will eventually become more commonplace. Privacy infringement is likely to become a concern too, and some smart devices have already fallen foul of privacy regulations, including Sony’s $3,000 Aibo robot dog. The sensor-packed pooch cleverly uses facial recognition to train it to behave differently around familiar people, which was enough to cause the state of Illinois to ban the purchase or use of Aibo by its residents, citing infringement of the state’s Biometric Information Privacy Act. Sky without its sky-based signal Taxing times One of the claims commonly voiced today is that tech corporations such as Amazon, Facebook, Google and eBay should somehow ‘pay more tax’, as they are often criticised for paying minimal tax on the billions of dollars’ worth of trade they generate in any particular country. It’s a reasonable point to make, and after an initial outcry, these firms now ‘book’ sales more ethically (in our case, to UK-sourced trade, rather than shifting sales abroad in an effort to reduce their tax bills) and they are eager to state that they comply fully with local tax codes. As the Internet started to evolve, the world grew smaller which created all kinds of problems for governments wanting to levy taxes on digital trade, where no physical goods actually crossed borders. From the taxman’s point of view, how do you treat the sale of advertising or digital marketing if the sales office is in London or Dublin, but the buyer is somewhere in Europe? Where is the digital service actually ‘produced’? As one solution to raising badly needed tax revenues, some countries including France and the UK implemented a Digital Sales Tax (DST), a headline-grabbing gesture that was immediately rebuffed by the US, which threatened to retaliate for supposedly targeting US tech giants (a stance they hold to this day). More than half of Europe is still working towards introducing their own DST. A 2% DST was introduced in the UK in 2020 aimed at ‘soft’ sales of search engine services, social media advertising and the like, but not consumer Internet sales. eBay chose not to pass this tax on to Ever since flatbed scanners first hit the streets, OCR (optical character recognition) software has been available to computer users and text-to-speech programs can convert the digitised results into audio. Visually impaired persons or those having reading difficulties can Meanwhile, satellite broadcaster Sky is launching a new streaming service called Sky Glass, comprising a Sky-brand 4K UHD ‘carbon neutral’ flat screen package offering 43-inch, 55-inch and 65-inch screen sizes in a range of five chassis colours. Voice control is built in and there are three HDMI ports. It signifies Sky’s gradual move away from satellite towards broadband-based delivery – Sky’s new all-in-one screens are a dish-free and box-free service Sky Glass is an all-in-one 4K UHD streaming package and require Wi-Fi or wired Eth- that does away with a satellite dish and set-top ernet. This self-contained screen box. It come in various sizes and chassis colours. Practical Electronics | December | 2021 13 Text-to-speech Amazon’s $1,000 Astro bot is an Alexa on wheels – but for US customers only for the time being. advertisers, but other tech firms have added it to their bills. The problem of taxing profits from online trade is something the OECD has been grappling with for years, as it is only by international co-operation that the issue will finally be settled. In September a multinational agreement was finally hammered out – engineered by the US – to raise corporation tax globally to a minimum 15%, which is less than many countries already levy anyway. The EU is still considering its own tax policies to address what it calls the ‘fair taxation of the digital economy’. Expect more clamouring that high-tech multinationals pay ‘the right amount of tax’ and news about an EU directive before the year end. Until then, it’s business as normal as far as the US tech giants are concerned. Alexa gets some wheels With the festive season looming, Amazon has been busy with some intriguing new product launches, many focused on home security. As a sign of things to come, their forthcoming Astro The Ring ‘Always Home Cam’ drone will patrol a single-storey property and relay video. Amazon has opened its first ‘4 Star’ store outside the US – in Kent, England. ‘household robot for home monitoring’ has Alexa built in and includes a 6-month free trial of the property monitoring service Ring Protect Pro. Astro will obey your commands, follow you around, patrol your premises, send an alarm and perform many other useful tasks on the go. It is likely to cost $1,000 and is yet to be listed by Amazon UK. Some early reviewers muse that it might infringe privacy, or fall down stairs! (For more details, see: https://youtu.be/sj1t3msy8dc) Amazon.com is also soft-launching its Ring-brand ‘Always Home Cam’ security camera drone intended for domestic indoor use on a single storey; it flies along custom flight paths that users ‘train’ it to follow, and (naturally) it plays streaming video on an app. Currently, Always Home Cam is available by invitation only in the US. Amazon UK introduced Echo Show 15, a 15.6-inch, 1080p Full HD flat panel display and 5MP camera (with built-in privacy shutter) that can be wall-mounted or placed on a counter using an optional stand. It features a redesigned home screen, more customisation and promises all-new Alexa experiences. The self-contained laptop-size screen is optimised for ‘family organisation’ and could be the next best thing to a smart TV in the kitchen, Amazon reckons, as it supports Prime Video and Amazon’s Drop-In video calling. It has debuted at £239.99. Pre-order from Amazon.co.uk The company has also chosen Britain to open its first non-foods ‘4 Star’ store outside the US, in Bluewater, Greenhithe, Kent. The store will sell a special selection of products that average an Amazon 4-star rating, but it does not use ‘Just Walk Out’ technology used in Amazon Fresh stores (see PE, August 2021). A new ‘4-star’ option has been glimpsed in Amazon’s shopping app showing a QR code that might offer buyers faster in-store checkouts. Aviation Spirit In other news, electrically powered flight took a step towards reality on 15 September when Rolls-Royce announced a successful record-breaking test flight of its new all-electric airplane, the Spirit of Innovation (noting that the figurine adorning Rolls-Royce cars is the ‘Spirit of Ecstasy’, see: https://bit.ly/pe-dec21-rr1). The electric plane first taxied in March and finally left the ground at a UK Ministry of Defence site in Britain last month. Its aerodynamics are redolent of a Rolls-Royce Merlin-powered Spitfire fighter plane, but in place of a Spitfire’s aviation-spirit-fuelled piston The Spirit of Innovation, an electric aircraft produced by Rolls-Royce takes its maiden flight in England. 14 Practical Electronics | December | 2021 originally sailed from this (then tiny) inlet port in north-east Lincolnshire, England to Holland. The town recently celebrated 400 years of the Mayflower’s voyage. Pylon upgrade Mayflower AI is an autonomous, crewless vessel packed with AI technology designed for marine research. engine is a 400kW powertrain containing the world’s most power-dense battery pack ever built for an aircraft, says Rolls-Royce. The Spirit of Innovation forms part of Rolls-Royce’s ACCEL programme, short for ‘Accelerating the Electrification of Flight’. You can follow progress at: https://bit.ly/pe-dec21-rr2 America’s GE is also investing in electric flight, partnering with NASA and MagniX USA in a new $260m EPFD (Electric Powertrain Flight Demonstration) project, with commercial passenger transport ultimately in mind. Speed control The automotive press has become very excitable about the forthcoming implementation of automatic speed limiter systems in new cars but, happily, Net Work readers already know about them! The September 2019 issue (p.13) forewarned that Intelligent Speed Assistance (ISA) could eventually find its way into cars, and ISAs (also known as ASLs) are now mandated for new vehicle sales from July 2022. A combination of GPS or traffic sign recognition cameras may be used to force a vehicle to slow down to comply with prevailing speed restrictions. Despite Brexit, it’s expected that the UK will fall in line with these European safety regulations, though it will be many years before ISAs have any impact on casualty rates. Backed by the resources of IBM working with other marine partners, the crewless Mayflower AI ship is an autonomous vessel and proving ground for AI-powered marine research. With no crew to worry about, Mayflower’s designers were able to concentrate on packing the vessel’s hull with AI technology instead. During some early trials, problems with its hybrid solar-boosted powertrain were highlighted, so Mayflower returned to dry dock in Plymouth, England for improvements. You can follow the vessel’s developments and view dashboard data at: https://mas400.com/ Our friends in America might be interested in https://bit.ly/pe-dec21-mf as, in actual fact, the Pilgrim fathers Artist impression of the T-pylon test line at National Grid’s training academy, the first new design for an electricity pylon in Great Britain for nearly a century. Practical Electronics | December | 2021 The first new electric pylon design in Britain for more than 100 years has been erected by contractors Balfour Beatty for National Grid in Somerset, England. The new T-Pylon reduces a pylon’s footprint compared with traditional lattice towers commonly populating the British countryside. (Landowners and farmers receive an annual ‘way leave’ rental for hosting pylons and pipelines on their land, in case you ever wondered). The new design is a single pole with T-shaped arms carrying diamond-shaped cable arrays, and some of the new pylons also contain a time capsule laid by local schoolchildren containing, of course, Covid-19 face masks and lateral flow tests for posterity. Finally, an interesting footnote to my item in the September issue (page 14) about Virgin Orbit’s satellite-launching service based on their specially adapted jumbo jets, and the controversial Nord2 gas pipeline running between Russia and Germany (PE, October 2021, p.13). A fascinating article published on Theaviationgeekclub.com describes a period in the 1990s when the US tried its best to buy three Soviet Tu-160 Blackjack strategic bombers that were being disposed of by the Ukrainian Air Force. The US badly wanted to ensure they did not find their way back to Russia, and US companies had also won contracts for scrapping military hardware that had become a financial burden for Ukraine. It turns out, according to author Dario Leone, that three Tu-160 bombers were pencilled in for purchase by America’s Platforms International Corp in 1999 who, it was said, [ostensibly] intended to convert them into launch platforms for Pegasus Launch Vehicles to place satellites into low-earth orbit. The more things change, the more they stay the same: an added irony is that Ukraine needed the money because it was deeply in debt to Russia because of unpaid gas bills. You can read the full article at: https://bit.ly/pe-dec21-tu160 The Northrop Grumman Pegasus project pre-dates the Virgin Orbit 747 satellite launcher and Wikipedia has an item at: https://bit.ly/pe-dec21-ngp See you next month for more news and updates from Net Work! The author can be reached at: alan<at>epemag.net 15