Silicon ChipRipping customers off through service & repair - February 2023 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Ripping customers off through service & repair
  4. Feature: Computer Memory, Part 2 by Dr David Maddison
  5. Feature: Computer Memory Addendum by Nicholas Vinen
  6. Project: Active Mains Soft Starter, Part 1 by John Clarke
  7. Subscriptions
  8. Project: Advanced Test Tweezers, Part 1 by Tim Blythman
  9. Feature: A 30mm Spark-Gap Tesla Coil by Flavio Spedalieri
  10. PartShop
  11. Project: Active Subwoofer, Part 2 by Phil Prosser
  12. Product Showcase
  13. Feature: Heart Rate Sensor Module by Jim Rowe
  14. Project: Noughts & Crosses, Part 2 by Dr Hugo Holden
  15. Serviceman's Log: Nature abhors a vacuum, and so do I by Dave Thompson
  16. Vintage Radio: VE301Wn Dyn Volksemfanger by Ian Batty
  17. Market Centre
  18. Advertising Index
  19. Notes & Errata: Bass Block Subwoofer, January 2021; High-Performance Active Subwoofer, December 2022
  20. Outer Back Cover

This is only a preview of the February 2023 issue of Silicon Chip.

You can view 36 of the 112 pages in the full issue, including the advertisments.

For full access, purchase the issue for $10.00 or subscribe for access to the latest issues.

Articles in this series:
  • Computer Memory, Part 1 (January 2023)
  • Computer Memory, Part 2 (February 2023)
  • Computer Memory Addendum (February 2023)
Articles in this series:
  • Computer Memory, Part 1 (January 2023)
  • Computer Memory, Part 2 (February 2023)
  • Computer Memory Addendum (February 2023)
Items relevant to "Active Mains Soft Starter, Part 1":
  • Active Mains Soft Starter PCB [10110221] (AUD $10.00)
  • PIC12F617-I/P programmed for the Active Mains Soft Starter [1011022A.HEX] (Programmed Microcontroller, AUD $10.00)
  • Firmware for the Active Mains Soft Starter [1011022A] (Software, Free)
  • Active Mains Soft Starter PCB pattern (PDF download) [10110221] (Free)
  • Active Mains Soft Starter lid panel artwork (PDF download) (Free)
Articles in this series:
  • Active Mains Soft Starter, Part 1 (February 2023)
  • Active Mains Soft Starter, Part 2 (March 2023)
  • Active Mains Soft Starter (January 2024)
  • Active Mains Soft Starter (February 2024)
Items relevant to "Advanced Test Tweezers, Part 1":
  • Advanced/ESR Test Tweezers back panel PCB (blue) [04105242] (AUD $2.50)
  • Advanced SMD Test Tweezers PCB set [04106221+04106212 {blue}] (AUD $10.00)
  • PIC24FJ256GA702-I/SS programmed for the Advanced SMD Test Tweezers (0410622A.HEX) (Programmed Microcontroller, AUD $15.00)
  • 0.96in cyan OLED with SSD1306 controller (Component, AUD $10.00)
  • Advanced SMD Test Tweezers kit (Component, AUD $45.00)
  • Firmware for the Advanced SMD Test Tweezers [0410622A.HEX] (Software, Free)
  • Advanced SMD Test Tweezers PCB patterns (PDF download) [04106221+04106212] (Free)
  • Advanced SMD Test Tweezers sticker artwork (PDF download) (Panel Artwork, Free)
Articles in this series:
  • Advanced Test Tweezers, Part 1 (February 2023)
  • Advanced Test Tweezers, Part 2 (March 2023)
  • ADVANCED SMD TEST TWEEZERS (January 2024)
  • ADVANCED SMD TEST TWEEZERS (February 2024)
Items relevant to "Active Subwoofer, Part 2":
  • Active Monitor Speakers power supply PCB [01112221] (AUD $10.00)
  • Active Monitor Speakers cutting and assembly diagrams (Panel Artwork, Free)
  • Ultra-LD Mk.4 Amplifier PCB [01107151 RevC] (AUD $15.00)
  • Ultra-LD Mk3 200W Amplifier Module PCB [01107111] (AUD $15.00)
  • High-Performance Subwoofer amplifier bracket & heatsink diagrams (PDF download) (Panel Artwork, Free)
Articles in this series:
  • Active Monitor Speakers, Part 1 (November 2022)
  • Active Monitor Speakers, Part 2 (December 2022)
  • Active Subwoofer, Part 1 (January 2023)
  • Active Subwoofer, Part 2 (February 2023)
Items relevant to "Heart Rate Sensor Module":
  • Sample software for the Heart Rate Sensor Module (Free)
Articles in this series:
  • El Cheapo Modules From Asia - Part 1 (October 2016)
  • El Cheapo Modules From Asia - Part 2 (December 2016)
  • El Cheapo Modules From Asia - Part 3 (January 2017)
  • El Cheapo Modules from Asia - Part 4 (February 2017)
  • El Cheapo Modules, Part 5: LCD module with I²C (March 2017)
  • El Cheapo Modules, Part 6: Direct Digital Synthesiser (April 2017)
  • El Cheapo Modules, Part 7: LED Matrix displays (June 2017)
  • El Cheapo Modules: Li-ion & LiPo Chargers (August 2017)
  • El Cheapo modules Part 9: AD9850 DDS module (September 2017)
  • El Cheapo Modules Part 10: GPS receivers (October 2017)
  • El Cheapo Modules 11: Pressure/Temperature Sensors (December 2017)
  • El Cheapo Modules 12: 2.4GHz Wireless Data Modules (January 2018)
  • El Cheapo Modules 13: sensing motion and moisture (February 2018)
  • El Cheapo Modules 14: Logarithmic RF Detector (March 2018)
  • El Cheapo Modules 16: 35-4400MHz frequency generator (May 2018)
  • El Cheapo Modules 17: 4GHz digital attenuator (June 2018)
  • El Cheapo: 500MHz frequency counter and preamp (July 2018)
  • El Cheapo modules Part 19 – Arduino NFC Shield (September 2018)
  • El cheapo modules, part 20: two tiny compass modules (November 2018)
  • El cheapo modules, part 21: stamp-sized audio player (December 2018)
  • El Cheapo Modules 22: Stepper Motor Drivers (February 2019)
  • El Cheapo Modules 23: Galvanic Skin Response (March 2019)
  • El Cheapo Modules: Class D amplifier modules (May 2019)
  • El Cheapo Modules: Long Range (LoRa) Transceivers (June 2019)
  • El Cheapo Modules: AD584 Precision Voltage References (July 2019)
  • Three I-O Expanders to give you more control! (November 2019)
  • El Cheapo modules: “Intelligent” 8x8 RGB LED Matrix (January 2020)
  • El Cheapo modules: 8-channel USB Logic Analyser (February 2020)
  • New w-i-d-e-b-a-n-d RTL-SDR modules (May 2020)
  • New w-i-d-e-b-a-n-d RTL-SDR modules, Part 2 (June 2020)
  • El Cheapo Modules: Mini Digital Volt/Amp Panel Meters (December 2020)
  • El Cheapo Modules: Mini Digital AC Panel Meters (January 2021)
  • El Cheapo Modules: LCR-T4 Digital Multi-Tester (February 2021)
  • El Cheapo Modules: USB-PD chargers (July 2021)
  • El Cheapo Modules: USB-PD Triggers (August 2021)
  • El Cheapo Modules: 3.8GHz Digital Attenuator (October 2021)
  • El Cheapo Modules: 6GHz Digital Attenuator (November 2021)
  • El Cheapo Modules: 35MHz-4.4GHz Signal Generator (December 2021)
  • El Cheapo Modules: LTDZ Spectrum Analyser (January 2022)
  • Low-noise HF-UHF Amplifiers (February 2022)
  • A Gesture Recognition Module (March 2022)
  • Air Quality Sensors (May 2022)
  • MOS Air Quality Sensors (June 2022)
  • PAS CO2 Air Quality Sensor (July 2022)
  • Particulate Matter (PM) Sensors (November 2022)
  • Heart Rate Sensor Module (February 2023)
  • UVM-30A UV Light Sensor (May 2023)
  • VL6180X Rangefinding Module (July 2023)
  • pH Meter Module (September 2023)
  • 1.3in Monochrome OLED Display (October 2023)
  • 16-bit precision 4-input ADC (November 2023)
  • 1-24V USB Power Supply (October 2024)
  • 14-segment, 4-digit LED Display Modules (November 2024)
  • 0.91-inch OLED Screen (November 2024)
  • The Quason VL6180X laser rangefinder module (January 2025)
  • TCS230 Colour Sensor (January 2025)
  • Using Electronic Modules: 1-24V Adjustable USB Power Supply (February 2025)
Items relevant to "Noughts & Crosses, Part 2":
  • Static Noughts & Crosses Computer game board PCB [08111221] (AUD $12.50)
  • Static Noughts & Crosses Computer compute board PCB [08111222] (AUD $12.50)
  • W27C020-70 EEPROM programmed for the Static Noughts & Crosses Computer [0811122A.bin] (Programmed Microcontroller, AUD $10.00)
  • EEPROM data for the Static Noughts & Crosses Computer (0811122A.bin) (Software, Free)
  • Static Noughts & Crosses Computer case details (PDF download) (Panel Artwork, Free)
Articles in this series:
  • Noughts & Crosses Machine, Pt1 (January 2023)
  • Noughts & Crosses, Part 2 (February 2023)

Purchase a printed copy of this issue for $11.50.

SILICON SILIC CHIP www.siliconchip.com.au Publisher/Editor Nicholas Vinen Technical Editor John Clarke – B.E.(Elec.) Technical Staff Jim Rowe – B.A., B.Sc. Bao Smith – B.Sc. Tim Blythman – B.E., B.Sc. Advertising Enquiries (02) 9939 3295 adverts<at>siliconchip.com.au Regular Contributors Allan Linton-Smith Dave Thompson David Maddison – B.App.Sc. (Hons 1), PhD, Grad.Dip.Entr.Innov. Geoff Graham Associate Professor Graham Parslow Dr Hugo Holden – B.H.B, MB.ChB., FRANZCO Ian Batty – M.Ed. Phil Prosser – B.Sc., B.E.(Elec.) Cartoonist Louis Decrevel loueee.com Founding Editor (retired) Leo Simpson – B.Bus., FAICD Silicon Chip is published 12 times a year by Silicon Chip Publications Pty Ltd. ACN 626 922 870. ABN 20 880 526 923. All material is copyright ©. No part of this publication may be reproduced without the written consent of the publisher. Subscription rates (Australia only) 6 issues (6 months): $65 12 issues (1 year): $120 24 issues (2 years): $230 Online subscription (Worldwide) 6 issues (6 months): $50 12 issues (1 year): $95 24 issues (2 years): $185 For overseas rates, see our website or email silicon<at>siliconchip.com.au Recommended & maximum price only. Editorial office: Unit 1 (up ramp), 234 Harbord Rd, Brookvale, NSW 2100. Postal address: PO Box 194, Matraville, NSW 2036. Phone: (02) 9939 3295. ISSN: 1030-2662 Printing and Distribution: Editorial Viewpoint Ripping customers off through service & repair We need legislation to deal with companies’ ongoing assault on servicing and repairing mechanical or electronic devices. Luckily, in Australia, we have strong consumer rights legislation. Despite this, greedy corporations are doing all they can to strip away anything not covered by such legislation. The problems fall under a few categories, including (but not limited to): • No spare parts available for new products, despite the manufacturer having enough parts to make more of the same product. • Purposefully making products difficult to repair, for example, Onewheel electric skateboards that ‘brick’ themselves if the battery is swapped or smartphones that refuse to work if a module is swapped from another identical phone. • Artificially limiting the lifespan of products; planned obsolescence is a huge environmental problem. • Restricting the availability of spare parts and tools. • Limiting the availability of hardware or software required for diagnosis and repair. • Refusing to release schematics and software, even for products that are no longer supported. • Overcharging for proprietary parts. Australian legislation to deal with these assaults on consumers would be a good start. The EU has a strong history of consumer protection, and if they start taking action too, others might follow. Why don’t we just boycott these companies? We should, but a minority of consumers are aware of the situation. The average customer won’t realise they’ve made a mistake until they are already out of pocket. Many competitors will use similar tactics, too, leaving us with few good choices. While I can point at some particularly egregious examples of all the above (and more), this anti-consumer behaviour is an industry-wide trend. Legislation could be drafted to solve these problems without imposing unreasonable burdens on manufacturers. It used to be standard to provide after-sales support such as releasing schematics, making all parts available and devices used to be designed to be repairable (now it’s often the opposite). Some possible solutions to the above points include: • Pay customers compensation or give a full refund if spare parts cannot be provided within a reasonable time frame for products still being sold. • Legislate the availability of spare parts for a certain period after the warranty runs out. • Disallow collusion between companies to prevent the original manufacturers from selling spares to those wishing to repair their devices. For example Apple’s exclusivity deal with Intersil, see: siliconchip.au/link/abiy • If a company stops offering spares, force them to release schematics, CAD drawings and software so others can do so; after all, they’ve effectively abandoned their product at that stage. • Make it mandatory to release all documentation for repairs either when manufacturer support stops, or some reasonable period after the product is released (say, five years), whichever comes first. • Penalties for companies caught charging excessively more for functionally equivalent parts. I realise that a comprehensive legislative solution would be complicated, but that is no reason to avoid trying. The biggest challenge is that the companies often spend large amounts of money to hire lobbyists (who aren’t always truthful), to influence politicians to vote against such measures. by Nicholas Vinen 24-26 Lilian Fowler Pl, Marrickville 2204 2 Silicon Chip Australia's electronics magazine siliconchip.com.au