Silicon ChipThe Fox Report - May 2020 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Subscriptions: PE Subscription
  4. Publisher's Letter: Publisher's Statement
  5. Publisher's Letter
  6. Feature: The Fox Report by Barry Fox
  7. Feature: Techno Talk by Mark Nelson
  8. Feature: Net Work by Alan Winstanley
  9. Project: 433MHz Wireless Data Range Extender by John Clarke
  10. Project: Bridge-mode Audio Amplifier Adaptor by NICHOLAS VINEN
  11. Project: iCEstick by Tim Blythman
  12. Project: Ultra-low-distortion Preamplifier with Tone Controls by John Clarke
  13. Feature: Circuit Surgery by Ian Bell
  14. Feature: PIC n’Mix by Mike Hibbett
  15. Feature: Make it with Micromite by Phil Boyce
  16. Feature: AUDIO OUT by Jake Rothman
  17. Feature: Visual programming with XOD by Julian Edgar
  18. Back Issues by Julian Edgar
  19. Feature: Max’s Cool Beans by Max the Magnificent
  20. PCB Order Form
  21. Advertising Index

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

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Articles in this series:
  • 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)
The Fox Report Barry Fox’s technology column M Welcome to the key-free zone ost computer software now comes with an activation key. Fair enough, because this helps prevent piracy. But it’s a lot less fair if one key cannot activate installations on several same-owner computers (desktop, laptop and rainy-day spare), perhaps throwing up error messages when two are on line at the same time. Most modern software keys can only be used on one computer, once, and there is no easy option to re-use it legitimately; for example, if the owner has to rebuild a PC after a crash, theft or hardware upgrade. Sometimes a routine OS update will knock out installed software, which then cannot be used on another PC. First Windows, then macOS We expect this from Windows, but it is now happening with Macs. The recent upgrade to Catalina killed existing 32bit software. There was no automated check and warning ahead of installation; just an encouragement to update the OS and then error messages from 32-bit programs, with no option to undo the update. It seems Apple has been taking lessons from Microsoft in how to upset customers. Another unhappy new trend is to sell software on a monthly or annual subscription, rather than outright purchase; Microsoft’s Office 365 or Adobe Photoshop are common examples. Go key-free So, unless software promises legitimate re-use of a key; for example, by uninstalling or easy voiding online to de-activate, there is now a real incentive to go keyfree, with open-source equivalents that are cash-free (often with the option to make a cash donation to the developers). The curse of the key and the fact that I own and use multiple computers has driven me to research key-free alternatives. There is a lot of junk out there, with various traps for the unwary – notably, unwittingly downloading software you don’t want. I have compiled a list of key-free programs that I have happily used, with no problems (yet). Most are open source, fully free; a few are free, but stripped-down versions of keyed versions with more features. This list comes with no guarantees and the warning to a) download direct from the developers’ sites, not some middleman, and b) think carefully before clicking on ‘download’ because the good free stuff is sometimes buried amongst not-so-good stuff. For the purposes of this column, I have deliberately avoided recommending any proprietary software that only works free for a trial period. Free trialling is a good way to buy software because it shows that developers have confidence in their product, but that’s not what this key-free list is about. I have not included free anti-virus software. Recommendations are too risky. But I will say that I have left some PCs protected only by Microsoft’s Windows Defender, and not (yet) regretted it. Office, Mail, photos Most of what follows is for Windows PCs, but some packages have Mac options. The longstanding open-source equivalent to Microsoft Office is now called Apache Open Office, see: www. openoffice.org It does pretty much everything the costly Microsoft packages do, in much the same way, but lacks an equivalent to the Microsoft email client Outlook. Fortunately, Windows 10 comes with a stripped down version of Outlook, called Mail. Mail lacks some Outlook features, but the wide range of free Google Tools (Calendar, Contacts, Slides, Sheets, Docs, Photos) fills the gap. Contacts makes a good free replacement for now-defunct Cardscan (albeit without Cardscan’s clever business card scanning OCR, but not many people use business cards any more). Google Drive provides 15GB of free online/cloud storage, and if you are prepared to spend tedious time mastering the confusing Settings options you can stash limitless photos for free. Adobe seems hell-bent on pricing Photoshop out of the market, which Plastic enclosures standard & miniature www.hammondmfg.com/dwg8.htm www.hammondmfg.com/1551USB.htm 01256 812812 sales<at>hammond-electronics.co.uk 8 Practical Electronics | May | 2020 is steering serious users towards the extremely powerful open-source, free, rival GIMP (GNU Image Manipulation Program). GIMP takes a bit of learning (like Photoshop) but Adobe’s pricing is strong encouragement to make the effort. Further applications The free open-source movie editor Shotcut is in many respects the video equivalent of GIMP. https://shotcut.org Open-source Handbrake efficiently transcodes video (crushes file sizes, processes and converts formats) for free. https://handbrake.fr Where Handbrake can’t cope with a video processing job, then Avidemux probably can. For instance, Avidemux can stitch small video files together. https://sourceforge.net/projects/ avidemux Audacity is a wonderful free opensource tool for editing sound; in many respects it is the audio equivalent of Shotcut. It also enables the capture of streams and inputs that the computer is playing, which can be more useful than the music industry would wish. www.audacityteam.org Likewise, OBS (Open Broadcaster Software) is excellent free, open-source software for capturing and streaming video. https://obsproject.com By far the best all-round program for playing audio and video files is free open-source VLC. www.videolan.org The only thing VLC has failed me on (despite my adding add-ons) is playing Blu-ray movies from a Blu-ray drive. Although the appearance is a bit crude, the free version of Leawo Blu-ray player will usually do the trick. www.leawo.com/blu-ray-player Downloading multimedia files can be a nuisance. I have found that JDownloader eases the pain. In fact, you may be surprised at just what audio and video streams it can download. https://jdownloader.org When files are too big to attach to an email, or rejected by the recipient’s system, some people use the free tier of Dropbox. I prefer the2GB free tier of WeTransfer, but do try both. www.dropbox.com https://wetransfer.com One unhappy by-product of spending too much time with a computer is the way it fills up with duplicate files. The best free tool I have found for thinning them out is Duplicate Cleaner Free. www.digitalvolcano.co.uk/ dcdownloads.html If disaster strikes and your computer is wiped out by a crash, malware or update, you will hope you have a recent full system backup. By far the most reliable backup program of many I have tried is Macrium Reflect. The free version makes full system backups, which is all most people need to sleep easy. www.macrium.com/reflectfree Doubtless some readers will already be fuming over software that I have failed to mention and which they feel is better than the stuff I have mentioned. If so, let’s hear from them and share the benefits. 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 | May | 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