Silicon ChipNet Work - March 2020 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Subscriptions: PE Subscription
  4. Publisher's Letter
  5. Feature: The Fox Report
  6. Feature: Techno Talk by Mark Nelson
  7. Feature: Net Work by Alan Winstanley
  8. Project: Diode Curve Plotter by Tim Blythman
  9. Project: Audio DSP by Design by Phil Prosser, Words Nicholas Vinen
  10. Project: Steam Train Whistle ... or Diesel Horn by JOHN CLARKE
  11. Project: Galvanic Skin Response by Jim Rowe
  12. Feature: PIC n’ Mix by Mike Hibbett
  13. Feature: Circuit Surgery by Ian Bell
  14. Feature: AUDIO OUT
  15. Feature: Make it with Micromite by Phil Boyce
  16. Feature: Visual programming with XOD by Julian Edgar
  17. Feature: Max’s Cool Beans by Max the Magnificent
  18. Feature: Electronic Building Blocks by Julian Edgar
  19. PCB Order Form
  20. Advertising Index

This is only a preview of the March 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, read the latest on Internet-based fraud, ID theft and advice on using 2FA (two-factor authentication) in your online dealings. Plus, SSDs – can you really entrust them with your digital data? A t the end of last year, the UK’s National Fraud and Cyber Crime Reporting Centre – Action Fraud – reported the case of two brothers from the West Midlands who were involved in a nationwide eBay scam that raked in a six-figure profit over several years before they were finally caught. They recruited innocent so-called ‘trading assistants’ to sell on eBay what turned out to be non-existent mobile phones and tablets: the goods were never shipped but the monies were collected from the ‘assistants’ by the fraudsters themselves. After skipping bail and fleeing abroad, the crooks were extradited from The Philippines and were jailed for nine years for a scam that spanned nearly half a decade. The scale of the fraud became apparent when victims reported their losses to Action Fraud (www.actionfraud.police.uk), and local police units eventually joined the dots and caught the villains. eBay, PayPal, Facebook, banks... Meanwhile, their victims’ eBay and Paypal accounts were frozen and some were hounded by debt collectors; one victim reportedly took out a second mortgage to raise cash, while another suffered serious bouts of depression. British legislation is very unforgiving about the plight of money mules – those who accept a ‘fee’ for passing bogus third-party transactions through their own accounts, whether driven by sheer desperation, naivety or (more often) plain greed. The penalties for this form of money laundering can be very harsh – up to 14 years imprisonment in the worst case, Financial Fraud Action UK reminds us. In 2018, over 40,000 cases of bank account abuse due to suspected money mule activity were reported in the UK, says the fraud prevention service CIFAS. Social media and instant messaging channels were frequently used to attract mules before switching to secure encrypted channels like WhatsApp to ensnare them. Younger, impressionable people and university students were being taken in by these phony job offers. The obvious advice is to never, ever be 12 tempted by job opportunities for ‘sales agents’, ‘transaction processors’ or any other schemes that let you ‘earn money working from home’ as a middle man, processing sales transactions through your personal accounts. Too much information Personal data is highly valuable to crooks and the author is sometimes shocked by the naivety of those who insist on sharing their details online when conducting private business in public. For example, I have just seen a rather elderly user post her full name, postal address, post (zip) code and hours of availability on a local Facebook group regarding someone taking away her old washing machine for scrap. (I asked admin to delete the post.) Useful snippets of data like these can help crooks to form a bigger picture about victims, leading to impersonation fraud or other forms of crime. In the June 2018 CIFAS Report, Wolves of the Internet: Where do fraudsters hunt for data online (available at: http://bit.ly/pe-mar20-wolves) the value of personal data traded by ID thieves and fraudsters was laid bare. So-called ‘Fullz’ (a complete package of an individual’s ID credentials) are traded openly both on the ‘surface web’ as well as the underground ‘dark web’. Most prized on the dark web were PayPal logins, valued at £279 each, followed by eBay logins (£267). Online banking credentials were worth £161 but a lowly Facebook passcard was just £3.74, said the report. Nearly 50% of stolen data was then used to fraudulently apply for a credit card. Analysts Forensic Pathways Ltd in London used dark web crawlers to sample and collate stolen personal data over a 50-month period, and they estimated that someone’s ‘Fullz’ data was worth about $42 and a BIN (Bank Identification Number) was about $21. A bank card’s magnetic data ‘dump’ was more valuable, about $93. One person’s Fullz profile was posted online where it attracted more than 270 hyperlinks to it, and it was used to apply for nearly two dozen dodgy accounts and cards. Two-factor authentication (2FA) can alert users of unauthorised login attempts. Two-factor authentication As always, one should remain incredibly vigilant and safeguard against personal data theft as much as possible. In today’s wired world, and with 5G coming around the corner, it’s more important than ever to be on the look-out for fraud and ID theft and not ignore any suspicious events. As an extra safeguard, Two-factor authentication (2FA) adds another step to logging in by sending an SMS message and PIN code, for example, which can alert account holders if their logins have been compromised. The remote possibility of impersonation fraud means that 2FA may not be 100% foolproof though. To enable it, go to: My eBay -> Personal information -> Security information -> 2 Step verification. Gmail and Facebook users should sign up for 2FA if you haven’t already done so – for further Practical Electronics | March | 2020 details see http://bit.ly/pe-mar20-2fa and http://bit.ly/pe-mar20-2fa-fb Solid-state survivor My thanks to regular PE reader Godfrey Manning who followed up on my January item concerning upgrading personal computers with solid-state drives (SSDs). Godfrey asks: ‘How reliable have you found solid-state drives? I’ve had a couple fail after just a few months. The system freezes or displays a “Blue screen” error. For example, a full-system virus scan stalls or crashes. The drives are usually still readable by a stand-alone disc-copying utility, so I’ve reverted to SATA spinning discs. This has happened to different brands of SSD. After retrieving a Western Digital SSD, I broke it open and found it to contain a SanDisk chipset. Integral-brand SSDs have different chips.’ I admit to having a slight nagging doubt when installing my first solid-state drive at the heart of what is my main production machine. I chose to keep ‘busy’ data on my legacy spinning hard disk, while devoting the new SSD to hosting Windows. Many SSD users adopted that approach too, but others are not fazed by SSD reliability at all. I chose a Samsung Evo SSD mainly because Samsung is renowned for semiconductor memory and I preferred their Spinpoint hard drives in the past; I could also get one delivered quickly! There is plenty of life left in spinning hard disks (a 14 TB drive is yours for £450) but the market has consolidated in recent years, taking some memorable brands with it: Samsung eventually sold its disk business to Seagate, the brand that also acquired Maxtor, while IBM hived off its Deskstar drive business to Hitachi, which in turn went to Western Digital. Flash memory chipmaker SanDisk is now owned by Western Digital too, which is why SanDisk-branded chips appeared in Godfrey’s SSD. In a vote of confidence, PE’s Internet Service Provider tells me that they replaced all their servers’ hard drives with SSDs last year. Amazon’s Echo Flex is a smaller, plug-in adaptor unit offering Alexa services. Practical Electronics | March | 2020 In my system, some local files are backed up online to Microsoft OneDrive, but I also back up key data to a RAID-style NAS using the excellent Macrium Reflect software (a free unsupported Lite version is available from: www.macrium. com/reflectfree). My Synology NAS currently hosts a pair of Blue Origin’s New Shepard VTOL space vehicle lands successfully Western Digital ‘Red’ after a test launch. hard disks, but I also In early January, SpaceX launched take a ‘last gasp’ ransomware insurance backup of it on a removable 2TB Sam- its third crop of 60 satellites for Starsung drive (which has a Seagate label link, its low-earth orbit Internet satellite underneath). Seagate has since dropped project. The first stage successfully Samsung’s branding in favour of using landed vertically again on their drone the Maxtor name on these drives, and vessel ‘Of Course I Still Love You’ SSD portable drives are catching on too. in the Atlantic (seen on the Youtube As for the reliability of Flash memory, video https://youtu.be/HwyXo6T7jC4 all one can do is hope for the best but at 20:14). Astronomers are increasinginsure against the worst. A new SanDisk ly concerned about the impact that MicroSD card in my new Christmas the satellite constellations are having on observations, but thousands more gift of a trail camera failed without warning, taking some video snaps of satellites are set to be launched in the elusive wildlife with it. I guess noth- future. Special satellite coatings are being tested that might minimise ining is 100% secure. terference with astronomers’ optical News roundup: ransomware, instruments. This year may also see Echo, browsers and space test flights of SpaceX’s new Starship, a Major currency exchange company 37-engined super-heavy lifter designed Travelex suffered a serious ransom- to carry crew or up to 100 tonnes of ware attack on New Year’s Day, which cargo, possibly to the Moon or Mars. caused their trading platform and inAnother name to watch out for is ternal networks to go down for several Blue Origin, an aerospace firm founded days, with traders reverting to pen and by Jeff Bezos of Amazon fame. It has paper. It is reported that Sodinokibi been quietly developing lower cost, malware was introduced via unpatched reusable vertical take-off and landing Pulse Secure VPN servers. No details of sub-orbital vehicles that will take payany ransom demands were publicised. loads – and maybe paying passengers Amazon has launched a small plug-in – into space and back again (useful version of its Echo smart speakers. The when you’re a passenger). Space fans Echo Flex offers the usual Alexa voice will enjoy Blue Origin’s New Shepard control in a smaller form factor that fits vehicle test launch and vertical landdirectly into a wall socket. Amazon em- ing at: https://youtu.be/9pillaOxGCo phasises that Echo Flex is not optimised Unseasonally mild weather condifor music playback. It costs just £24.99, tions recently affected some Freeview UK and Ireland only. More details at: TV broadcasts for several days. The https://amzn.to/2urCyEB useful Radio & Television Investigation As an alternative to Chrome or Fire- Service website is provided by the BBC fox, Microsoft is re-engineering its Edge to help troubleshoot problems with both desktop web browser to make life easier terrestrial and satellite systems. The both for website users and developers. RTIS blamed the fine weather condiEdge is adopting the Chromium open- tions for causing ‘tropospheric ducting’ source model as its engine, which they – more details of this, along with lots hope will improve website compati- more practical advice is on the RTIS bility and performance for surfers and website at: http://bit.ly/pe-mar20-rtis encourage developers to adopt more That’s all for this month’s roundup – uniform web design standards. Users see you next month for more Net Work. can expect it to be delivered by a Windows 10 update and a new version of The author can be reached at: Edge for macOS is slated. More details alan<at>epemag.net from: www.microsoftedgeinsider.com 13