Silicon ChipMost software is a product, not a service - May 2022 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Most software is a product, not a service
  4. Feature: All About Heat Pipes by Dr David Maddison
  5. Feature: The History of Transistors, Pt3 by Ian Batty
  6. Project: AM-FM DDS Signal Generator by Charles Kosina
  7. Project: 500W Power Amplifier, Part 2 by John Clarke
  8. Feature: Air Quality Sensors by Jim Rowe
  9. Project: Slot Machine by Gianni Palotti
  10. Serviceman's Log: Where there’s a weld, there’s a way by Dave Thompson
  11. Project: Oatley LED Lighting & Driver Kits by John Clarke
  12. Subscriptions
  13. Vintage Radio: Calstan 559M2 superhet by Fred Lever
  14. PartShop
  15. Market Centre
  16. Advertising Index
  17. Notes & Errata: Dual Hybrid Power Supply, March 2022; Remote Control Range Extender, January 2022; Programmable Hybrid Lab Supply with WiFi, May & June 2021
  18. Outer Back Cover

This is only a preview of the May 2022 issue of Silicon Chip.

You can view 39 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:
  • The History of Transistors, part one (March 2022)
  • The History of Transistors, part one (March 2022)
  • The History of Transistors, Pt2 (April 2022)
  • The History of Transistors, Pt2 (April 2022)
  • The History of Transistors, Pt3 (May 2022)
  • The History of Transistors, Pt3 (May 2022)
Items relevant to "AM-FM DDS Signal Generator":
  • AM/FM DDS Signal Generator PCB [CSE211002] (AUD $7.50)
  • ATMEGA644PA-AN programmed for the AM/FM DDS Signal Generator [CSE21100A.HEX] (Programmed Microcontroller, AUD $20.00)
  • Pulse-type rotary encoder with pushbutton and 18t spline shaft (Component, AUD $3.00)
  • 0.96in cyan OLED with SSD1306 controller (Component, AUD $10.00)
  • 0.96in yellow/cyan OLED with SSD1306 controller (Component, AUD $10.00)
  • Firmware for the AM/FM DDS Signal Generator [CSE21100A.HEX] (Software, Free)
  • AM/FM DDS Signal Generator PCB pattern (PDF download) [CSE211002] (Free)
  • Front panel label and drilling diagram for the AM/FM DDS Signal Generator (Panel Artwork, Free)
Items relevant to "500W Power Amplifier, Part 2":
  • 500W Amplifier Module PCB [01107021 RevD] (AUD $25.00)
  • Hard-to-get parts for the 500W Amplifier (Component, AUD $180.00-200.00)
  • Parts collection for the 500W Amplifier (Component, AUD $235.00-250.00)
  • 500W Amplifier Module PCB pattern (PDF download) [01107021] (Free)
Articles in this series:
  • Fan Controller & Loudspeaker Protector (February 2022)
  • Fan Controller & Loudspeaker Protector (February 2022)
  • Amplifier Clipping Indicator (March 2022)
  • Amplifier Clipping Indicator (March 2022)
  • 500W Power Amplifier, Part 1 (April 2022)
  • 500W Power Amplifier, Part 1 (April 2022)
  • 500W Power Amplifier, Part 2 (May 2022)
  • 500W Power Amplifier, Part 2 (May 2022)
  • 500W Power Amplifier, Part 3 (June 2022)
  • 500W Power Amplifier, Part 3 (June 2022)
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)
Items relevant to "Slot Machine":
  • Slot Machine PCB [08105221] (AUD $5.00)
  • DFPlayer Mini audio player module (Component, AUD $6.00)
  • Micromite Plus LCD BackPack kit without touchscreen (Component, AUD $45.00)
  • Laser-cut acrylic pieces for the Slot Machine (Component, AUD $10.00)
  • Firmware, sounds and images for the Slot Machine [SlotMachine V10] (Software, Free)
  • Slot Machine PCB pattern (PDF download) [08105221] (Free)
  • Cutting diagrams for the Slot Machine (Panel Artwork, Free)

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. Nicolas Hannekum – Dip.Elec.Tech. Advertising Enquiries Glyn Smith Mobile 0431 792 293 glyn<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 Phil Prosser – B.Sc., B.E.(Elec.) Cartoonist Louis Decrevel loueee.com Former Cartoonist Brendan Akhurst 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 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 139, Collaroy Beach, NSW 2097. Phone: (02) 9939 3295. ISSN: 1030-2662 Printing and Distribution: Editorial Viewpoint Most software is a product, not a service Software offered “as a service” provides benefits almost entirely to the companies producing the software and not for their customers. I’ve complained about constant updates in this column before. Updates are a selling point of ‘software as a service’, but they rarely fix the bugs that are plaguing us or add valuable features. New features that are actually useful (the minority) could easily be rolled into a one-time annual or semi-annual update. I like having the option to decide if it is worthwhile to pay a couple of hundred dollars for the latest version of the software based on the claimed improvements. Why would I want to spend several times more for a “subscription” which provides very little real value? Anti-subscription rhetoric might seem odd from a magazine publisher. But keep in mind that you are genuinely getting something new each month when you subscribe to a monthly magazine, unlike most software where regular updates are just fixing things that shouldn’t have been broken in the first place. Take CorelDraw as an example. While we use it and mostly like it, CorelDraw suffers from terrible performance at times (a problem for at least a decade), and it’s too crash-prone for my liking. Still, it’s pretty decent overall, and we want to continue using it. They bring out one new version a year, with perhaps a mid-year update, but they rarely add or improve anything that makes upgrading worthwhile. Still, when we were offered an ‘upgrade protection plan’ (UPP) for around $130 per user per year to stay on the latest version, we accepted it. We recently received notification that they were ending that plan, forcing anyone who wants to use the latest version onto a $50 per month subscription ($600 per year). That’s nearly five times what we were paying. While you can still buy the software outright, it’s $1100 per copy with no apparent upgrade discount, making that about nine times as expensive as the upgrade plan. Even when we were paying for separate upgrades, we were not paying $600 per year. It isn’t worthwhile, given the marginal improvements with each version, and the lack of significant performance improvements or bug fixes. Does Corel realise that many people like us already have Adobe Creative Suite (including Adobe Illustrator) that we could switch to essentially for free? We don’t want to do that, but it’s an attractive option compared to another expensive subscription. While I don’t like paying $70-odd per month for Creative Suite, it includes several very useful packages, including Illustrator, Photoshop and InDesign, making it a far better value. Corel could have increased what they were charging us for the upgrade service, and we would probably have continued to pay it. But now we have cancelled all our UPPs and will stick with the 2022 version. They will get no more money from us; good job, Corel. It comes down to what users will tolerate. If most users say “no more” like we did and cancel, companies will get the message. But if enough users roll over and pay the exorbitant subscription fees, they’ll see that this scheme works and keep it up. This leaves the market open for a competitor to come along and offer a reasonable alternative without the subscription fee. Any such competitor would be guaranteed a portion of the market; those who don’t like subscription models. Also, the open-source (and free) software Inkscape is looking more attractive by the day... by Nicholas Vinen 24-26 Lilian Fowler Pl, Marrickville 2204 2 Silicon Chip Australia's electronics magazine siliconchip.com.au