Silicon ChipThe Fox Report - August 2020 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: Micromite LCD BackPack V3 by Tim Blythman
  11. Project: Steering Wheel audio BUTTON TO INFRARED Adaptor by John Clarke
  12. Project: JUNK MAIL REPELLER! by Allan Linton-Smith
  13. Back Issues by Jim Rowe
  14. Project: Bargain Modules Class-D Stereo Plus Subwoofer Amplifier by Allan Linton-Smith
  15. Feature: Circuit Surgery by Ian Bell
  16. Feature: AUDIO OUT by Jake Rothman
  17. Feature: Make it with Micromite by Phil Boyce
  18. Feature: Practically Speaking by Mike Hibbett
  19. Feature: Max’s Cool Beans by Max the Magnificent
  20. Feature: Electronic Building Blocks by Julian Edgar
  21. PCB Order Form
  22. Advertising Index

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

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Articles in this series:
  • 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)
The Fox Report Barry Fox’s technology column New tech norm W e hear a lot about the ‘new normal’ that will follow the CV lockdown. But even BC (Before Covid), the face of tech journalism was changing radically. I am old enough to remember when ‘official’ departments announced new radio, TV and telecoms licensing schemes and services at press conferences where government ministers and their technical advisers explained the tech and answered journalists’ questions. The events were often held in government buildings. Heightened risks of terrorism brought tighter security. Eventually, these were replaced by press releases with a phone or fax number to contact for ‘further information’ – which often came late and lightweight. The audio, video and telecoms manufacturers continued to hold press conferences, often tied to trade days at public exhibitions, and hosted press visits to their headquarters and labs in far-off lands. Readers must have grown weary of thinly disguised ‘thank-you letter’ articles about production lines. The end of the Hi-Fi and video boom years left audio and video companies tightening their belts, and only the consumer electronics giants and computer games and cellphone companies had money to burn on jollies for journalists. Gadget writers Meanwhile, the tabloid press – and free newspapers – were breeding a new genus of writers who describe themselves as ‘tech specialists’ but are better by-lined as ‘gadget writers’; they know nothing about how things work and ‘review’ new devices with a pretty picture, ballpark street price and a few words of off-the-shelf enthusiasm. I once went to a press event for which the host company had hired a young gadget writer as presenter. One device she showed was a USB-powered cooler. ‘Does it rely on the Peltier effect,’ we asked. ‘No,’ she said. ‘It’s USB.’ ‘Influencers’ In recent years the gadget pages have been overtaken by online ‘tech’ sites hosted by a new breed of commentator – the ‘influencer’. A colourful character with a pretty face enthuses over new boys’ toys, with a superficial hands-on demo after the bizarre ritual now known as ‘unboxing’. These sites are two a penny and free to view. The hosts earn money from click-through purchase links and get to keep, and privately flog off, their free product samples. The manufacturers now often stage party-style launch events with celebrity guests and no opportunity for inquiring journalists to share questions and answers in an open forum Q&A. Influencers no longer need attend unless they fancy a party, because free samples will be sent by courier to any influencer who can prove that a lot of people hit their site. The only loser is the real-world customer who has no way of learning anything of significance about performance or reliability. An old-school marketing man, who works for one of the world’s largest electronics companies, confided recently: ‘I was astonished to find that one of our marketing team is now giving a new 65-inch OLED TV, worth £3000, to anyone with 50,000 social media followers. All they have to do is post a picture of them with the set.’ Everything online I recently signed into a ‘New Influencer Ecosystem seminar’, organised by a ‘new media group’ for ‘Influencer market agencies’, which are the modern online equivalent of the advertising agencies, which traditionally placed glossy adverts in magazines. Most of the seminar speakers spouted meaningless marketing nonsense, but a couple of more honest articulates revealed how the technology now routinely built into computer equipment has been shockingly abused; facial recognition, location detection and language analysis help an influencer gather valuable personal data on ‘followers’ who ‘engage’. The tools are the same as those used to influence elections and referendums. Influencers use clickbaiting to temporarily boost their follower numbers by getting people to click on the offer of a free iPad. The CV crisis has of course put a stop to all physical press conferences and trips. Everything is now being done on line and it is hard to see how Ventilated enclosures hammfg.com/electronics/small-case/ plastic/1551v More than 5000 different enclosure styles: hammfg.com/electronics/small-case 01256 812812 sales<at>hammond-electronics.co.uk 8 Practical Electronics | August | 2020 and when there can be a return to the old norm of physical events, hands-on demonstrations, viewing and listening sessions, big trade shows and lots of air miles. It’s very likely that many manufacturers will see this as a blessed relief from the cost and effort involved in hosting live events. Sometimes, as with lockdown webinars organised by satellite company SES/Astra and the UK’s DTG (Digital Television Group), online events are useful for sharing market research and hard technical facts. For instance, the DTG cited BT’s measurement of lockdown daytime Internet traffic in the UK as averaging 5Tbps, with the infrastructure coping well with peaks of 17.5Tbps. Content-free content But other online events have presented a worrying view of the likely future. Xiaomi, the Chinese company which claims to be the third-largest smartphone producer in the world, lockdown-launched a new phone with a livestream online ‘watch party’. Ahead of the event Xiaomi claimed, ‘the same technology as the likes of Apple – for a much more affordable price’ with a ‘£179 phone to rival the £419 iPhone SE.’ A bold claim – it takes a lot more than price to get iPhone users to switch to Android. I signed up and tuned in to the Xiaomi conference on Twitter. The event turned out to be a half-hour pre-packaged promo, with a 15-minute forced wait before a few zippy presentations, some unboxing with next to no hard tech and no opportunity to ask questions and get answers. I asked to try a phone for PE, but none is yet available for us. The link may still be active at https:// bit.ly/pe-aug20-xia. If so, you can judge for yourself whether this is a good way forward for product launches, or a giant step backwards for serious journalism. The good old days I have resignedly regarded CV lockdown as Nature’s way of telling me to sort through a lifetime of paper accumulated when researching stories. Among a mass of tedious documents on topics like computer error messages, spectrum allocation, energy policy and changes to UK telephone numbering, I found a note from mid-1992. Philips took a group of journalists from all over Europe to Paris for a one-day in-andout briefing on the now-forgotten CD Interactive system that was then in the pipeline to launch. As a ‘treat’, we were taken to the then-new Disney attraction. This is the preface note I wrote to my editor in New York, verbatim: Check in at Heathrow 5.45am. The coach meeting us at de Gaulle airport fails to turn up. Go by taxi to La Defense. But no-one from Philips is at the other end to pay the taxi drivers. Find way to the roof of the Grand Arche, looking for Philips people while the taxi drivers hold passengers hostage. Find someone from Philips, and go back down again... Travel to Euro Disney by coach, but cannot leave cases and press kits etc. in coach because it is not waiting. Walk round Euro Disney carrying bags for an hour or so (time for two rides). Walk miles back to coach to the airport to find that it has left, taking two Italians to the airport and stranding 14 Brits. Find train station at Euro Disney which has one of three ticket office windows open and a queue of hundreds. No one anywhere to ask advice, so take train to Paris and, mainly by luck, get connection to de Gaulle airport. Run with bags to coach, run round de Gaulle airport and get last flight home only because take-off has been delayed by computer failure. Barry Fox, FBKS (Fellow, International Moving Image Society) STEWART OF READING 17A King Street, Mortimer, near Reading, RG7 3RS Telephone: 0118 933 1111 Fax: 0118 933 2375 USED ELECTRONIC TEST EQUIPMENT Check website www.stewart-of-reading.co.uk Fluke/Philips PM3092 Oscilloscope 2+2 Channel 200MHz Delay TB, Autoset etc – £250 LAMBDA GENESYS LAMBDA GENESYS IFR 2025 IFR 2948B IFR 6843 R&S APN62 Agilent 8712ET HP8903A/B HP8757D HP3325A HP3561A HP6032A HP6622A HP6624A HP6632B HP6644A HP6654A HP8341A HP83630A HP83624A HP8484A HP8560E HP8563A HP8566B HP8662A Marconi 2022E Marconi 2024 Marconi 2030 Marconi 2023A PSU GEN100-15 100V 15A Boxed As New £400 PSU GEN50-30 50V 30A £400 Signal Generator 9kHz – 2.51GHz Opt 04/11 £900 Communication Service Monitor Opts 03/25 Avionics POA Microwave Systems Analyser 10MHz – 20GHz POA Syn Function Generator 1Hz – 260kHz £295 RF Network Analyser 300kHz – 1300MHz POA Audio Analyser £750 – £950 Scaler Network Analyser POA Synthesised Function Generator £195 Dynamic Signal Analyser £650 PSU 0-60V 0-50A 1000W £750 PSU 0-20V 4A Twice or 0-50V 2A Twice £350 PSU 4 Outputs £400 PSU 0-20V 0-5A £195 PSU 0-60V 3.5A £400 PSU 0-60V 0-9A £500 Synthesised Sweep Generator 10MHz – 20GHz £2,000 Synthesised Sweeper 10MHz – 26.5 GHz POA Synthesised Sweeper 2 – 20GHz POA Power Sensor 0.01-18GHz 3nW-10µW £75 Spectrum Analyser Synthesised 30Hz – 2.9GHz £1,750 Spectrum Analyser Synthesised 9kHz – 22GHz £2,250 Spectrum Analsyer 100Hz – 22GHz £1,200 RF Generator 10kHz – 1280MHz £750 Synthesised AM/FM Signal Generator 10kHz – 1.01GHz £325 Synthesised Signal Generator 9kHz – 2.4GHz £800 Synthesised Signal Generator 10kHz – 1.35GHz £750 Signal Generator 9kHz – 1.2GHz £700 HP/Agilent HP 34401A Digital Multimeter 6½ Digit £325 – £375 HP 54600B Oscilloscope Analogue/Digital Dual Trace 100MHz Only £75, with accessories £125 (ALL PRICES PLUS CARRIAGE & VAT) Please check availability before ordering or calling in HP33120A HP53131A HP53131A Audio Precision Datron 4708 Druck DPI 515 Datron 1081 ENI 325LA Keithley 228 Time 9818 Practical Electronics | August | 2020 Marconi 2305 Modulation Meter £250 Marconi 2440 Counter 20GHz £295 Marconi 2945/A/B Communications Test Set Various Options POA Marconi 2955 Radio Communications Test Set £595 Marconi 2955A Radio Communications Test Set £725 Marconi 2955B Radio Communications Test Set £800 Marconi 6200 Microwave Test Set £1,500 Marconi 6200A Microwave Test Set 10MHz – 20GHz £1,950 Marconi 6200B Microwave Test Set £2,300 Marconi 6960B Power Meter with 6910 sensor £295 Tektronix TDS3052B Oscilloscope 500MHz 2.5GS/s £1,250 Tektronix TDS3032 Oscilloscope 300MHz 2.5GS/s £995 Tektronix TDS3012 Oscilloscope 2 Channel 100MHz 1.25GS/s £450 Tektronix 2430A Oscilloscope Dual Trace 150MHz 100MS/s £350 Tektronix 2465B Oscilloscope 4 Channel 400MHz £600 Farnell AP60/50 PSU 0-60V 0-50A 1kW Switch Mode £300 Farnell XA35/2T PSU 0-35V 0-2A Twice Digital £75 Farnell AP100-90 Power Supply 100V 90A £900 Farnell LF1 Sine/Sq Oscillator 10Hz – 1MHz £45 Racal 1991 Counter/Timer 160MHz 9 Digit £150 Racal 2101 Counter 20GHz LED £295 Racal 9300 True RMS Millivoltmeter 5Hz – 20MHz etc £45 Racal 9300B As 9300 £75 Solartron 7150/PLUS 6½ Digit DMM True RMS IEEE £65/£75 Solatron 1253 Gain Phase Analyser 1mHz – 20kHz £600 Solartron SI 1255 HF Frequency Response Analyser POA Tasakago TM035-2 PSU 0-35V 0-2A 2 Meters £30 Thurlby PL320QMD PSU 0-30V 0-2A Twice £160 – £200 Thurlby TG210 Function Generator 0.002-2MHz TTL etc Kenwood Badged £ 6 5 Function Generator 100 microHz – 15MHz Universal Counter 3GHz Boxed unused Universal Counter 225MHz SYS2712 Audio Analyser – in original box Autocal Multifunction Standard Pressure Calibrator/Controller Autocal Standards Multimeter RF Power Amplifier 250kHz – 150MHz 25W 50dB Voltage/Current Source DC Current & Voltage Calibrator £350 £600 £350 POA POA £400 POA POA POA POA Marconi 2955B Radio Communications Test Set – £800 9