Silicon ChipNet Work - February 2020 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Subscriptions: PE Subscription
  4. Publisher's Letter
  5. Feature: The Fox Report by Barry Fox
  6. Feature: Techno Talk by Mark Nelson
  7. Feature: Net Work by Alan Winstanley
  8. Project: Audio DSP by Design by Phil Prosser , Words by Nicholas Vinen
  9. Project: Motion-Triggered 12V Switch by Nicholas Vinen
  10. Project: USB Keyboard and Mouse Adaptor for Micros by Tim Blythman
  11. Project: Stamp-sized digital audio player by Jim Rowe
  12. Project: Colour Maximite Computer
  13. Feature: Circuit Surgery by Ian Bell
  14. Feature: Practically Speaking by Mike Hibbett
  15. Feature: Using Stepper Motors by Paul Cooper
  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. Feature: Electronic Building Blocks by Julian Edgar
  20. PCB Order Form
  21. Advertising Index

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

You can view 0 of the 80 pages in the full issue.

Articles in this series:
  • Techno Talk (February 2020)
  • Techno Talk (February 2020)
  • Techno Talk (March 2020)
  • Techno Talk (March 2020)
  • (April 2020)
  • (April 2020)
  • Techno Talk (May 2020)
  • Techno Talk (May 2020)
  • Techno Talk (June 2020)
  • Techno Talk (June 2020)
  • 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)
Net Work Alan Winstanley This month, the big news is the launch of our new online shop. It’s a significant upgrade from our previous virtual store and lays the foundation for a whole new web presence for Practical Electronics. R egular readers will be aware that about a year ago your favourite hobby electronics magazine came under the fine stewardship of a new publisher; namely, our editor Matt Pulzer. Matt works tirelessly to bring readers and subscribers a monthly journal crammed with plenty of electronic projects, theory and tutorials – enough to keep the most industrious hobbyist very busy during the forthcoming winter season! Our website at https://www.epemag. com is the place to go to learn more about the current edition, or to download any source code files relating to that month’s issue. The website has served us well since its launch back in 2012 but, as it was built purely on ‘static’ HTML, it presents challenges in terms of navigation and scalability, and there is the need to improve usability on portable devices like tablets and Chromebooks too. Our online presence is therefore receiving a well-overdue makeover using modern web design, navigation and hosting techniques. This task has been under way for quite some time under the tutelage of our new web systems manager Kris Thain, who is the latest addition to the PE staff line-up. New shop A key stage of our website redevelopment was successfully reached last November, when we launched a completely redesigned shopping cart to introduce convenient new design features along with a fresh new look. You can still buy back issues, books, CDROMs and more, and we ship worldwide as usual. You can also phone through an order or snail mail it to us with a GBP cheque payable to ‘Practical Electronics’. Existing customers’ details have been migrated to the new shopping cart, so regular users of the PE Online Shop should be able to log in as before. Details of our subscription options (printed copy, PDF download or Pocketmags edition) are provided as well. Last, an important reminder: subscribers to the print edition now click through to our new subscription 12 Work on redesigning and modernising the PE website and Online Shop is well under way. Come and take a look! service provider – Select – who can set you up with a direct debit, so you don’t need to remember to renew every year. At the same time, we’re also modernising our downloads system with a slick new service: monthly source code .zip files will be hosted in the Online Shop as a free download, though you will need to create an online account if you don’t already have one. Download histories are then stored and accessible in your personal account, enabling you to keep track of them in the future. A limit of three downloads of any one .zip file is allowed, but we would like to re-assure readers that we’ll always try to help out if another copy is needed later down the line. Just drop me an email. It’s an exciting time for Practical Electronics as we endeavour to modernise our web presence. Everything is being handled by the PE team in-house and we’re working hard to provide customer services, consolidate a new online store, bring in legacy magazine resources and more material under a fresh new banner. For now, we’d like to thank readers for being patient while work on our web presence is ongoing. We’re almost there – the occasional missing image will be filled in, pages will be duly populated and links to legacy material will be updated. Shop till you drop After Black Friday and last November’s ‘Cyber Monday’ online shopping binge, Amazon announced that its Cyber Monday turnover had been the largest single shopping day in its corporate history. Amazon’s fashion arm did well too, boasting record-breaking sales: ‘Best-sellers included Carhartt Men’s Acrylic Watch Hat and Champion Men’s Powerblend Fleece Pullover Hoodie,’ Amazon declared triumphantly (which explains the Ed’s new attire). Independent traders selling in Amazon’s stores got a slice of the cake too; they sold more merchandise on Cyber Monday than in any other 24-hour period in Amazon’s history, the firm said. One thing I must admit to, dear readers, is that I finally buckled under the Black Friday pressure and found myself enrolled in Amazon’s Prime package at £7.99 a month. The ‘perks’ of Prime membership have been drilled into us and it must be said that Amazon’s Practical Electronics | February | 2020 website, a Fire TV Stick and the Amazon app on a smart TV all picked up my Prime membership faultlessly. It has been said that our behaviour changes when we subscribe to services this way: since we are now paying for a subscription, we may as well use it, though Amazon will refund fees (on application) if Prime is not used in any particular month. Although many Amazon Prime movies are still rented the normal way, several free videos, a music track or two and a few next-day parcels later (18-hour delivery, in one case), I fear that I’m hooked. The Western market for smart speakers such as Amazon’s Echo range continues to explode, but Google’s Nest range fared less well, according to analysts Canalys in their survey of Q3 2019 unit sales. Amazon grabbed 36% of the global market share with sales of over ten million units, three times more than Google sold in the same period. Other brands and devices that mainly serve the Asian markets included Alibaba’s Tmall Genie, plus Xiaomi and Baidu brand speakers, which all grew in sales volumes, while Google’s sales plunged by 40%. The global market for smart displays (those with an LCD screen) expanded five-fold, reports Canalys, showing where future consumer interest is heading. Not the case A tech retailer disappointed the author when he bought a Samsung A10 2019 tablet with a bundled ‘starter kit’ case during the Black Friday period. The case proved to be an obsolete ‘2018’ model that does not fit Samsung’s 2019 tablet, as if consumers should know the difference: the rear camera cut-out is in the wrong place and the case is too large. Another retailer had pulled the same trick, judging by reviews. Surfing a few days later, pop-up ads promised an even cheaper price (darn!), but no stock was readily available either for delivery or for in-store collection (phew!). It’s time retailers stopped such misleading advertising; under UK consumer protection law, the practices of ‘bait advertising’ (where little or no stock is available) and ‘bait and switch’ (dangling an offer Google Cloud Print will close in December 2020, so home users will need to use the hardware’s native services instead. Practical Electronics | February | 2020 for unavailable merchandise, hoping to switch interested buyers onto something pricier), are illegal abusive practices. Meanwhile, Amazon listed a suitable tablet case by the same vendor in two different places, at significantly different prices. It pays to shop around. And finally Facebook’s Portal screens offer family friendly video calling on smart devices or TVs. ‘User experience may vary,’ says Facebook. Facebook is shipping its second-generation ‘Portal’ smart LCD screens, not seen in the UK before now. It offers family friendly video chat with webcam-style augmented reality (AR) masks for fun and games. The standalone Portal screens range from 8-inch to 15.6-inch and TV-connected devices enable video calls to be enjoyed on a wide screen. They can access Alexa, WhatsApp, Messenger, Amazon Prime or act as a digital photo frame. Portal will be ideal for many families, but some early adopters have complained about poor performance, claiming they need superfast broadband. ‘User experience may vary,’ says the caption in Facebook’s jitter-free promo video. Learn more at: https://portal.facebook.com Google is giving up on Google Cloud Print, its cloud-based printer driver. The service, which has been in beta since 2010 (!), will close at the end of 2020. Users who send print jobs or photos over the web to their network printer should switch to their printer’s own cloud service [eg Epson Connect or HP ePrint] instead, says Google. More details at http://bit.ly/pe-feb20-googend and a shortlist of some affected printers is at http://bit.ly/pe-feb20-print One of the largest leaks of personal data in history occurred in November 2019 when details of more than 1.2 billion individual users were left wide open on a Google Cloud server. Data included a wide range of personal information and LinkedIn profiles. At the time of writing, the source of the massive breach had largely been narrowed down to servers connected with the data aggregation company PDL (People Data Labs). You can see if you’re affected by entering your email address in: https://haveibeenpwned.com/ Amid rows between the US, France, the UK and the rest of the world about digital service taxation, the OECD has outlined proposals for a ‘unified approach’ to taxing the profits of consumer-facing multinational corporations (MNCs) such as Facebook and Google that shift digitally generated profits to more tax-efficient havens. The UK initially abandoned its efforts to tax MNCs’ profits on ‘soft’ digital services such as marketing or advertising fees. Huawei battles onwards in the teeth of a US trade embargo. The firm’s new Mate 30 smartphone is said to contain no US-made components at all, and uses Huawei’s own app store; the lack of any OEM-installed Google services may not be an issue in Asian markets in any case. In Russia, the pre-installation of Russian-origin software on smartphones, TVs and tablets became mandatory on 1 January. In the UK, telecoms seller O2 has switched on its first 5G network, promising users unlimited high-speed data in 50 towns and cities by next summer. O2 is focussing on commercial areas and transport hubs first. A coverage checker is at: http://bit.ly/pe-feb20-o2 Attention Windows users! Some 27.5% of Windows desktop users are still using Windows 7, and PC makers hope for a mass exodus onto Windows 10 once W7 support finally ends on 14 January. About 5% still use Windows 8 and 1.3% remain committed to Windows XP, says Global StatsCounter. The uptake of macOS 10.15 has climbed to 27% and is soon set to overtake macOS Mojave. Finally, I never did find out what the mysterious Ethernet port on the rear of a new LG Full HD TV (see Net Work, December 2019) was for. It is not a ‘smart’ TV and I suspect it only fetches firmware downloads over the web. Following on from my Freeview item in the same issue, I hope to explore some other ways of receiving Freeview over a network in the next few columns. See you next month for more Net Work! The author can be reached at: alan<at>epemag.net 13