Silicon ChipWe all deserve a right to repair - March 2019 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: We all deserve a right to repair
  4. Feature: Medical, Health and First Aid Smartphone Apps – Part 2 by Dr David Maddison
  5. Project: Ultra low noise remote controlled stereo preamp, Pt.1 by John Clarke
  6. Product Showcase
  7. Project: Our new DAB+ Tuner with FM and AM – Part 3 by Duraid Madina & Tim Blythman
  8. Serviceman's Log: My father, the ultimate "serviceman" by Dave Thompson
  9. Project: Touch controlled all-diode checker and plotter by Tim Blythman
  10. Review: First Look at the Arduino MKR Vidor 4000 by Tim Blythman
  11. Project: Versatile Trailing Edge Dimmer – Part 2 by John Clarke
  12. Feature: El Cheapo Modules 23: Galvanic Skin Response by Jim Rowe
  13. Vintage Radio: Astor HNQ Mickey 4.5 valve radio by Fred Lever
  14. PartShop
  15. Market Centre
  16. Advertising Index
  17. Notes & Errata: Tinnitus & Insomnia Killer, November 2018; Stationmaster, March 2017
  18. Outer Back Cover

This is only a preview of the March 2019 issue of Silicon Chip.

You can view 34 of the 104 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:
  • Medical, Health and First Aid Smartphone Apps - Part 1 (February 2019)
  • Medical, Health and First Aid Smartphone Apps - Part 1 (February 2019)
  • Medical, Health and First Aid Smartphone Apps – Part 2 (March 2019)
  • Medical, Health and First Aid Smartphone Apps – Part 2 (March 2019)
Items relevant to "Ultra low noise remote controlled stereo preamp, Pt.1":
  • Low-Noise Stereo Preamplifier PCB [01111119] (AUD $25.00)
  • Input Switching Module PCB for the Low Noise Preamplifier [01111112] (AUD $15.00)
  • Input Selection Pushbutton PCB for the Low Noise Preamplifier [01111113] (AUD $5.00)
  • Universal Voltage Regulator PCB [18103111] (AUD $5.00)
  • PIC16F88-I/P programmed for the Low-Noise Stereo Preamp with Six Input Selector [0111111M.HEX] (Programmed Microcontroller, AUD $15.00)
  • PIC16F88-I/P programmed for the Low-Noise Stereo Preamp [0111111B.HEX] (previously 0111111A.HEX) (Programmed Microcontroller, AUD $15.00)
  • Firmware and source code for the Low-Noise Stereo Preamplifier [0111111B.HEX] (previously 0111111A.HEX) (Software, Free)
  • Low-Noise Stereo Preamplifier PCB pattern (PDF download) [01111119] (Free)
  • Low-Noise Stereo Preamplifier Input Switcher PCB pattern (PDF download) [01111112] (Free)
  • Low-Noise Stereo Preamplifier Input Selector Pushbutton PCB pattern (PDF download) [01111113] (Free)
Articles in this series:
  • Ultra low noise remote controlled stereo preamp, Pt.1 (March 2019)
  • Ultra low noise remote controlled stereo preamp, Pt.1 (March 2019)
  • Ultra low noise remote controlled stereo preamp – Part 2 (April 2019)
  • Ultra low noise remote controlled stereo preamp – Part 2 (April 2019)
Items relevant to "Our new DAB+ Tuner with FM and AM – Part 3 ":
  • DAB+/FM/AM Radio main PCB [06112181] (AUD $15.00)
  • Dual Horizontal PCB-mounting RCA sockets (white/red) [RCA-210] (Component, AUD $2.50)
  • PCB-mount right-angle SMA socket (Component, AUD $3.00)
  • 465mm extendable VHF whip antenna with SMA connector (Component, AUD $10.00)
  • 700mm extendable VHF whip antenna with SMA connector (Component, AUD $15.00)
  • PCB-mount right-angle PAL socket (Component, AUD $5.00)
  • Short Form Kit for the Micromite Plus Explore 100 (Component, AUD $75.00)
  • Case pieces for the DAB+/FM/AM Tuner (PCB, AUD $20.00)
  • Firmware (BAS and HEX) files for the DAB+/FM/AM Radio project (Software, Free)
  • DAB+/FM/AM Radio main PCB pattern (PDF download) [06112181 RevC] (Free)
Articles in this series:
  • DAB+ Tuner with FM & AM and a touchscreen interface! (January 2019)
  • DAB+ Tuner with FM & AM and a touchscreen interface! (January 2019)
  • Build-it-yourself DAB+/FM/AM radio (February 2019)
  • Build-it-yourself DAB+/FM/AM radio (February 2019)
  • Our new DAB+ Tuner with FM and AM – Part 3 (March 2019)
  • Our new DAB+ Tuner with FM and AM – Part 3 (March 2019)
Items relevant to "Touch controlled all-diode checker and plotter":
  • Diode Curve Plotter PCB [04112181] (AUD $5.00)
  • 2.8-inch TFT Touchscreen LCD module with SD card socket (Component, AUD $25.00)
  • STFU13N65M2 650V logic-level Mosfet (Component, AUD $10.00)
  • Matte Black UB3 Lid for the Multi Diode Curve Plotter (PCB, AUD $5.00)
  • Firmware (.ino sketches) for the Multi Diode Curve Plotter (Software, Free)
  • Multi Diode Curve Plotter PCB pattern (PDF download) [04112181] (Free)
  • Multi Diode Curve Plotter box cutting diagram (PDF download) (Panel Artwork, Free)
Items relevant to "Versatile Trailing Edge Dimmer – Part 2 ":
  • Touch and IR Remote Control Trailing Edge Dimmer Main PCB [10111191] (AUD $10.00)
  • Touch and IR Remote Control Trailing Edge Dimmer Mounting PCB [10111192] (AUD $10.00)
  • Touch and IR Remote Control Trailing Edge Dimmer Extension PCB [10111193] (AUD $10.00)
  • PIC12F617-I/P programmed for the Touch and IR Remote Control Trailing Edge Dimmer [1011119B.HEX] (Programmed Microcontroller, AUD $10.00)
  • Hard-to-get parts for the Touch and IR Remote Control Trailing Edge Dimmer (Component, AUD $20.00)
  • Infrared receiver parts for the Touch and IR Remote Control Trailing Edge Dimmer (Component, AUD $12.50)
  • Firmware (ASM and HEX) files for the Touch and IR Remote Control Trailing Edge Dimmer [1011119A.HEX] (Software, Free)
  • Touch and IR Remote Control Trailing Edge Dimmer PCB patterns (PDF download) [10111191-3] (Free)
  • Warning label for the Touch and IR Remote Control Trailing Edge Dimmer (PDF download) (Panel Artwork, Free)
Articles in this series:
  • Versatile Trailing Edge Dimmer with Touch Plate & IR (February 2019)
  • Versatile Trailing Edge Dimmer with Touch Plate & IR (February 2019)
  • Versatile Trailing Edge Dimmer – Part 2 (March 2019)
  • Versatile Trailing Edge Dimmer – Part 2 (March 2019)
Items relevant to "El Cheapo Modules 23: Galvanic Skin Response":
  • Sample code for El Cheapo Modules 23 - Galvanic Skin Response (GSR) (Software, Free)
Articles in this series:
  • El Cheapo Modules From Asia - Part 1 (October 2016)
  • El Cheapo Modules From Asia - Part 1 (October 2016)
  • El Cheapo Modules From Asia - Part 2 (December 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 3 (January 2017)
  • El Cheapo Modules from Asia - Part 4 (February 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 5: LCD module with I²C (March 2017)
  • El Cheapo Modules, Part 6: Direct Digital Synthesiser (April 2017)
  • El Cheapo Modules, Part 6: Direct Digital Synthesiser (April 2017)
  • El Cheapo Modules, Part 7: LED Matrix displays (June 2017)
  • El Cheapo Modules, Part 7: LED Matrix displays (June 2017)
  • El Cheapo Modules: Li-ion & LiPo Chargers (August 2017)
  • El Cheapo Modules: Li-ion & LiPo Chargers (August 2017)
  • El Cheapo modules Part 9: AD9850 DDS module (September 2017)
  • El Cheapo modules Part 9: AD9850 DDS module (September 2017)
  • El Cheapo Modules Part 10: GPS receivers (October 2017)
  • El Cheapo Modules Part 10: GPS receivers (October 2017)
  • El Cheapo Modules 11: Pressure/Temperature Sensors (December 2017)
  • El Cheapo Modules 11: Pressure/Temperature Sensors (December 2017)
  • El Cheapo Modules 12: 2.4GHz Wireless Data Modules (January 2018)
  • El Cheapo Modules 12: 2.4GHz Wireless Data Modules (January 2018)
  • El Cheapo Modules 13: sensing motion and moisture (February 2018)
  • El Cheapo Modules 13: sensing motion and moisture (February 2018)
  • El Cheapo Modules 14: Logarithmic RF Detector (March 2018)
  • El Cheapo Modules 14: Logarithmic RF Detector (March 2018)
  • El Cheapo Modules 16: 35-4400MHz frequency generator (May 2018)
  • El Cheapo Modules 16: 35-4400MHz frequency generator (May 2018)
  • El Cheapo Modules 17: 4GHz digital attenuator (June 2018)
  • El Cheapo Modules 17: 4GHz digital attenuator (June 2018)
  • El Cheapo: 500MHz frequency counter and preamp (July 2018)
  • El Cheapo: 500MHz frequency counter and preamp (July 2018)
  • El Cheapo modules Part 19 – Arduino NFC Shield (September 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 20: two tiny compass modules (November 2018)
  • El cheapo modules, part 21: stamp-sized audio player (December 2018)
  • El cheapo modules, part 21: stamp-sized audio player (December 2018)
  • El Cheapo Modules 22: Stepper Motor Drivers (February 2019)
  • El Cheapo Modules 22: Stepper Motor Drivers (February 2019)
  • El Cheapo Modules 23: Galvanic Skin Response (March 2019)
  • El Cheapo Modules 23: Galvanic Skin Response (March 2019)
  • El Cheapo Modules: Class D amplifier modules (May 2019)
  • El Cheapo Modules: Class D amplifier modules (May 2019)
  • El Cheapo Modules: Long Range (LoRa) Transceivers (June 2019)
  • El Cheapo Modules: Long Range (LoRa) Transceivers (June 2019)
  • El Cheapo Modules: AD584 Precision Voltage References (July 2019)
  • El Cheapo Modules: AD584 Precision Voltage References (July 2019)
  • Three I-O Expanders to give you more control! (November 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: “Intelligent” 8x8 RGB LED Matrix (January 2020)
  • El Cheapo modules: 8-channel USB Logic Analyser (February 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 (May 2020)
  • New w-i-d-e-b-a-n-d RTL-SDR modules, Part 2 (June 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 Volt/Amp Panel Meters (December 2020)
  • El Cheapo Modules: Mini Digital AC Panel Meters (January 2021)
  • El Cheapo Modules: Mini Digital AC Panel Meters (January 2021)
  • El Cheapo Modules: LCR-T4 Digital Multi-Tester (February 2021)
  • El Cheapo Modules: LCR-T4 Digital Multi-Tester (February 2021)
  • El Cheapo Modules: USB-PD chargers (July 2021)
  • El Cheapo Modules: USB-PD chargers (July 2021)
  • El Cheapo Modules: USB-PD Triggers (August 2021)
  • El Cheapo Modules: USB-PD Triggers (August 2021)
  • El Cheapo Modules: 3.8GHz Digital Attenuator (October 2021)
  • El Cheapo Modules: 3.8GHz Digital Attenuator (October 2021)
  • El Cheapo Modules: 6GHz Digital Attenuator (November 2021)
  • El Cheapo Modules: 6GHz Digital Attenuator (November 2021)
  • El Cheapo Modules: 35MHz-4.4GHz Signal Generator (December 2021)
  • El Cheapo Modules: 35MHz-4.4GHz Signal Generator (December 2021)
  • El Cheapo Modules: LTDZ Spectrum Analyser (January 2022)
  • El Cheapo Modules: LTDZ Spectrum Analyser (January 2022)
  • Low-noise HF-UHF Amplifiers (February 2022)
  • Low-noise HF-UHF Amplifiers (February 2022)
  • A Gesture Recognition Module (March 2022)
  • A Gesture Recognition Module (March 2022)
  • Air Quality Sensors (May 2022)
  • Air Quality Sensors (May 2022)
  • MOS Air Quality Sensors (June 2022)
  • MOS Air Quality Sensors (June 2022)
  • PAS CO2 Air Quality Sensor (July 2022)
  • PAS CO2 Air Quality Sensor (July 2022)
  • Particulate Matter (PM) Sensors (November 2022)
  • Particulate Matter (PM) Sensors (November 2022)
  • Heart Rate Sensor Module (February 2023)
  • Heart Rate Sensor Module (February 2023)
  • UVM-30A UV Light Sensor (May 2023)
  • UVM-30A UV Light Sensor (May 2023)
  • VL6180X Rangefinding Module (July 2023)
  • VL6180X Rangefinding Module (July 2023)
  • pH Meter Module (September 2023)
  • pH Meter Module (September 2023)
  • 1.3in Monochrome OLED Display (October 2023)
  • 1.3in Monochrome OLED Display (October 2023)
  • 16-bit precision 4-input ADC (November 2023)
  • 16-bit precision 4-input ADC (November 2023)
  • 1-24V USB Power Supply (October 2024)
  • 1-24V USB Power Supply (October 2024)
  • 14-segment, 4-digit LED Display Modules (November 2024)
  • 0.91-inch OLED Screen (November 2024)
  • 0.91-inch OLED Screen (November 2024)
  • 14-segment, 4-digit LED Display Modules (November 2024)
  • The Quason VL6180X laser rangefinder module (January 2025)
  • TCS230 Colour Sensor (January 2025)
  • The Quason VL6180X laser rangefinder module (January 2025)
  • TCS230 Colour Sensor (January 2025)
  • Using Electronic Modules: 1-24V Adjustable USB Power Supply (February 2025)
  • Using Electronic Modules: 1-24V Adjustable USB Power Supply (February 2025)

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SILICON SILIC CHIP www.siliconchip.com.au Editor Emeritus Leo Simpson, B.Bus., FAICD 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 Technical Contributor Duraid Madina, B.Sc, M.Sc, PhD Art Director & Production Manager Ross Tester Reader Services Ann Morris Advertising Enquiries Glyn Smith Phone (02) 9939 3295 Mobile 0431 792 293 glyn<at>siliconchip.com.au Regular Contributors Dave Thompson David Maddison B.App.Sc. (Hons 1), PhD, Grad.Dip.Entr.Innov. Geoff Graham Associate Professor Graham Parslow Ian Batty Cartoonist Brendan Akhurst 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: $105.00 per year, post paid, in Australia. For overseas rates, see our website or email silicon<at>siliconchip.com.au Editorial office: Unit 1 (up ramp), 234 Harbord Rd, Brookvale, NSW 2100. Postal address: PO Box 139, Collaroy Beach, NSW 2097. Phone (02) 9939 3295. E-mail: silicon<at>siliconchip.com.au ISSN 1030-2662 * Recommended & maximum price only. Editorial Viewpoint We all deserve a right to repair In the December 2018 issue, I lambasted the European Union public service for penalising Google for anti-competitive practices. I argued that Google did more to promote competition than stifle it. Well, this time I am going to say something nice about the EU. I applaud their new legislation giving consumers and business a “right to repair” the goods that they purchase. It is heartening to see that some people in the EU feel so strongly about this that they organised protests when it looked like the legislation might not be passed! Several US states also have similar laws, mainly in reaction to various companies abusing the 1998 DMCA copyright act in an attempt to prevent people from fixing their own equipment. In case you are not aware, the US/Australian “free trade agreement” (AUSFTA) of late 2017 had the result of making many of the provisions of the US DMCA into Australian law. So it affects us too. The reason why companies make devices hard to repair can be summed up in one word: money. If you can’t repair your product, you’ll either have to buy a new one or use their expensive repair service. Either way, they make out like bandits. And they can do all sorts of things to prevent repairs – encrypt software, use parts with restricted supply, refuse to provide service manuals etc. But as the people promoting this new EU law have helpfully pointed out, this is a very wasteful practice, resulting in a lot of equipment being thrown away which could otherwise be repaired. And it’s also a waste of money for consumers. You only have to read this month’s Serviceman column for a good example. The manufacturer wanted to charge $2000 for a new part when our correspondent was able to repair it with a $70 replacement LCD screen and a bit of knowledge and patience. See the following (short) related article: http:// siliconchip.com.au/link/aanl My biggest concern with manufacturers making it difficult for their products to be repaired is not so much the expense, but the idea that once they decide it’s no longer worthwhile for them to offer a repair service for a particular product, you will have no recourse if yours breaks. Motor vehicles are of particular concern. If you own a classic car from the 60s (say), you will generally not have much trouble fixing it if it breaks. You may have some difficulty getting new parts, but there are many companies which step in to supply replacement parts when the originals are no longer being made. So they generally are available. But imagine if you have a classic car from the 2010s still running in 2050 (assuming we’re still allowed to drive then!) and one of its many computers fails. Even if you can replace the parts which are broken, can you still get the required software? And what if you do manage to fix it, only to find that other computers in the vehicle detect the change and refuse to operate? I would like to see manufacturers release all proprietary information about electronic and mechanical devices once they no longer offer a repair service. That includes circuit diagrams and required firmware. This information should be sufficient for a qualified third party to fix any fault. After all, if they are no longer supporting their product, they have effectively abandoned it. Hopefully, we will get a “right to repair” in Australia some time soon! For more information on the new EU legislation, see: siliconchip.com.au/ link/aann And for general information about the movement, see: siliconchip.com. au/link/aano Printing and Distribution: Nicholas Vinen Derby Street, Silverwater, NSW 2148. 4 Silicon Chip Australia’s electronics magazine siliconchip.com.au