Silicon ChipThe Fox Report - December 2025 SILICON CHIP
  1. Contents
  2. Publisher's Letter: The lost art of backward compatibility
  3. Feature: Teach-In 2026 by Mike Tooley
  4. Subscriptions
  5. Project: Variable Speed Drive Mk2 for Induction Motors, Part 1 by Andrew Levido
  6. Feature: Audio Out by Jake Rothman
  7. Feature: Techno Talk by Max the Magnificent
  8. Feature: Max’s Cool Beans by Max the Magnificent
  9. Feature: The Fox Report by Barry Fox
  10. Feature: Circuit Surgery by Ian Bell
  11. Project: Digital Capacitance Meter by Stephen Denholm
  12. Feature: Net Work by Alan Winstanley
  13. Back Issues
  14. Project: Battery-Powered Model Train by Les Kerr
  15. PartShop
  16. Market Centre
  17. Advertising Index
  18. Back Issues

This is only a preview of the December 2025 issue of Practical Electronics.

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

Articles in this series:
  • Teach-In 12.1 (November 2025)
  • Teach-In 2026 (December 2025)
  • Teach-In 2026 (January 2026)
  • Teach-In 2026 (February 2026)
Items relevant to "Variable Speed Drive Mk2 for Induction Motors, Part 1":
  • Mk2 VSD PCB [11111241 or 9048-02] (AUD $15.00)
  • STM32G030K6T6 programmed for the VSD Mk2 [1111124A] (Programmed Microcontroller, AUD $10.00)
  • Firmware for the VSD Mk2 (Software, Free)
  • VSD Mk2 PCB pattern (PDF download) [11111241] (Free)
  • Mk2 VSD drilling & cutting diagrams (Panel Artwork, Free)
Articles in this series:
  • Variable Speed Drive Mk2, Part 1 (November 2024)
  • Variable Speed Drive Mk2, Part 2 (December 2024)
  • Variable Speed Drive Mk2 for Induction Motors, Part 1 (December 2025)
  • Variable Speed Drive Mk2 For Induction Motors, Part 2 (January 2026)
Articles in this series:
  • Audio Out (January 2024)
  • Audio Out (February 2024)
  • AUDIO OUT (April 2024)
  • Audio Out (May 2024)
  • Audio Out (June 2024)
  • Audio Out (July 2024)
  • Audio Out (August 2024)
  • Audio Out (September 2024)
  • Audio Out (October 2024)
  • Audio Out (March 2025)
  • Audio Out (April 2025)
  • Audio Out (May 2025)
  • Audio Out (June 2025)
  • Audio Out (July 2025)
  • Audio Out (August 2025)
  • Audio Out (September 2025)
  • Audio Out (October 2025)
  • Audio Out (November 2025)
  • Audio Out (December 2025)
  • Audio Out (January 2026)
  • Audio Out (February 2026)
Articles in this series:
  • Techno Talk (February 2020)
  • Techno Talk (March 2020)
  • (April 2020)
  • Techno Talk (May 2020)
  • Techno Talk (June 2020)
  • Techno Talk (July 2020)
  • Techno Talk (August 2020)
  • Techno Talk (September 2020)
  • Techno Talk (October 2020)
  • (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)
  • Techno Talk (July 2025)
  • Techno Talk (August 2025)
  • Techno Talk (October 2025)
  • Techno Talk (November 2025)
  • Techno Talk (December 2025)
  • Techno Talk (January 2026)
  • Techno Talk (February 2026)
Articles in this series:
  • Max’s Cool Beans (January 2025)
  • Max’s Cool Beans (February 2025)
  • Max’s Cool Beans (March 2025)
  • Max’s Cool Beans (April 2025)
  • Max’s Cool Beans (May 2025)
  • Max’s Cool Beans (June 2025)
  • Max’s Cool Beans (July 2025)
  • Max’s Cool Beans (August 2025)
  • Max’s Cool Beans (September 2025)
  • Max’s Cool Beans: Weird & Wonderful Arduino Projects (October 2025)
  • Max’s Cool Beans (November 2025)
  • Max’s Cool Beans (December 2025)
  • Max’s Cool Beans (January 2026)
  • Max’s Cool Beans (February 2026)
Articles in this series:
  • The Fox Report (July 2024)
  • The Fox Report (September 2024)
  • The Fox Report (October 2024)
  • The Fox Report (November 2024)
  • The Fox Report (December 2024)
  • The Fox Report (January 2025)
  • The Fox Report (February 2025)
  • The Fox Report (March 2025)
  • The Fox Report (April 2025)
  • The Fox Report (May 2025)
  • The Fox Report (July 2025)
  • The Fox Report (August 2025)
  • The Fox Report (September 2025)
  • The Fox Report (October 2025)
  • The Fox Report (October 2025)
  • The Fox Report (December 2025)
  • The Fox Report (January 2026)
  • The Fox Report (February 2026)
Articles in this series:
  • STEWART OF READING (April 2024)
  • Circuit Surgery (April 2024)
  • Circuit Surgery (May 2024)
  • Circuit Surgery (June 2024)
  • Circuit Surgery (July 2024)
  • Circuit Surgery (August 2024)
  • Circuit Surgery (September 2024)
  • Circuit Surgery (October 2024)
  • Circuit Surgery (November 2024)
  • Circuit Surgery (December 2024)
  • Circuit Surgery (January 2025)
  • Circuit Surgery (February 2025)
  • Circuit Surgery (March 2025)
  • Circuit Surgery (April 2025)
  • Circuit Surgery (May 2025)
  • Circuit Surgery (June 2025)
  • Circuit Surgery (July 2025)
  • Circuit Surgery (August 2025)
  • Circuit Surgery (September 2025)
  • Circuit Surgery (October 2025)
  • Circuit Surgery (November 2025)
  • Circuit Surgery (December 2025)
  • Circuit Surgery (January 2026)
  • Circuit Surgery (February 2026)
Articles in this series:
  • Win a Microchip Explorer 8 Development Kit (April 2024)
  • Net Work (May 2024)
  • Net Work (June 2024)
  • Net Work (July 2024)
  • Net Work (August 2024)
  • Net Work (September 2024)
  • Net Work (October 2024)
  • Net Work (November 2024)
  • Net Work (December 2024)
  • Net Work (January 2025)
  • Net Work (February 2025)
  • Net Work (March 2025)
  • Net Work (April 2025)
  • Net Work (September 2025)
  • Net Work (November 2025)
  • Net Work (December 2025)
The Fox Report Barry Fox’s technology column A blurry, indistinct photo isn’t ‘proof of delivery’ I f you buy goods online – and who now doesn’t, even if they would prefer to shop in person – this is for you. Keep it in mind when you next consider ordering from any seller using Royal Mail Tracked as its carrier service. Royal Mail’s letter service is legendarily unreliable. To my acute embarrassment, a birthday card I sent weeks ago still has not arrived. But Royal Mail Tracked delivery is supposed to be different, with real-time, end-to-end tracking of items along with photo proof of delivery. It’s the service online sellers pay extra to use (and charge us extra for). Recently, for the second time, electronic components I ordered from an eBay seller were sent by Royal Mail Tracked and failed to arrive. In each case, the (different) sellers provided a meaningless photo as a worthless ‘proof of delivery’. In each case, the eBay seller failed to challenge the useless proof from Royal Mail, telling me to contact them. I quote: “We already clearly tell to you that Your item was delivered..from our side we cant do nothing please contact with the courier service”. This is wrong; the seller is Royal Mail’s customer, having paid them to carry the package. Royal Mail’s official advice note headed “Marked as delivered but not received” clearly tells recipients who have failed to receive goods: “If you’re the recipient. Please contact the sender. They will contact us to enquire on your behalf”. See https:// help.royalmail.com/personal/s/article/ Marked-as-delivered-but-not-received I know from experience that it is relatively easy to sideline an unhelpful seller and make a chargeback request with the credit card company used to pay for goods or services. The card company considers the facts and claws back money from the seller if things look wrong. But as an exercise for these pages, I hacked through eBay’s jungle of looped FAQ Help pages, chatbot advice and noreply messaging to pursue a complaint and help others with the hassle. I’ve itemised the bare bones here, but note that eBay’s menu options may change depending on what steps you have already taken. Also, only correspond with the seller via eBay. Do not contact the seller directly, even if you have an email address. Open Your eBay Account, go to My eBay, Purchase History, find the item in Practical Electronics | December | 2025 question, click “More Actions” and use the “Contact Seller” option to write politely to the seller, confirming non-receipt. If the seller isn’t helpful, go again to Purchase History/More Actions, find the same item under Purchases. Then select “See Request Details” and “Ask eBay to Step In and Help”. Choose the appropriate reason and Confirm. You will (quite reasonably) need to assure that you have checked that the delivery address on the order was correct and have checked for misdelivery with neighbours and in possible ‘safe places’. Having done this, I complained that the fuzzy tracking photo provided showed no signature, no person and no house, and was thus obviously not proof of delivery. I also complained that the seller had wrongly told me to contact Royal Mail. Nevertheless, eBay rapidly rejected the complaint in a brusque “Case Is Now Closed” email. This offered no reason or reasoning and had a distinct whiff of Artificial Unintelligence automated responding about it: “This case is now closed... the seller provided tracking information that shows the item was delivered to your address. After reviewing all the details of this case, we determined that you won’t receive a refund.” There was no obvious option to appeal eBay’s unreasoned ruling. Still, the option exists. The trick is to access the Case Outcome details, which contain a small-print link named “If you disagree with the outcome, you can send an appeal”. But finding the Case Outcome is not easy, especially as the menu options change with case progress. One way is to search Customer Help for “Appeal the outcome of a case as a buyer” and click on the link offered; or you can go to Purchases/See Case Details and look for the option to “Send us an appeal”. Condense your text to the short length limit and Submit. eBay warns that it will only consider appeals against its decisions if there is new evidence. But just for the heck of it, I appealed the refusal to refund, essentially re-stating the facts and adding that “eBay has failed to give reasons for relying on self-evidently worthless ‘proof of delivery’... This undermines eBay’s guarantee promises... I no longer dare order anything from eBay that involves Royal Mail Tracked delivery”. Expecting another rejection, I started preparing a chargeback request to my credit card company. This is the process where the card company that made the original payment considers the facts of a dispute and claws back money from the seller, or middleman (eBay in this case), if they believe it is valid. The burden of proof then shifts to the seller, or eBay. The usual routine is for the seller to make a token defence by parroting what they already said, but give up when the cardholder rebuts. As if psychic, eBay Customer Service then came back with a rethink: “After reviewing this case, we decided to refund you for this purchase. We did this because we determined that the item was stolen during delivery.” In a separate email, an eBay employee (or AI-created character?) added: “I understand that the tracking shows item has been delivered but you have not received the item. … we’ve granted your appeal and as a courtesy, I’m happy to issue this refund for you. … Please note, this is a one-time exception to our policy and we will be unable to issue this courtesy again if future situations like this arise. … Have a wonderful day.” So, eBay was not admitting any mistake or failure in not challenging obviously worthless “proof of delivery”. Most significantly, eBay then offered “Some useful tips that can help to ensure that your future deliveries arrive safely.” Apart from the obvious “ensure that the correct address is on the order details when purchasing”, these tips are: • Select Click & Collect for hassle-free delivery to a collection point near you or • Choose a secure delivery location (like a locked porch box or an indoor delivery if available) or • Redirect the package to a nearby pickup location, or locker service, or by using eBay’s Click & Collect Service. This appears to be clear advice not to buy from any seller who only dispatches goods by Royal Mail Tracked. It’s exactly the conclusion I had already reached. I shall in future buy from Amazon, which uses its own courier service; or routinely avoid any transaction that involves carriage by Royal Mail Tracked. With customer advice like this from a sales organisation as big as eBay, how long can Royal Mail stay in the PE mail business? 45