Silicon ChipMarket Centre - April 2022 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Writing clealy and concisely
  4. Feature: Geiger Counters and Radiation by Dr David Maddison
  5. Project: 500W Power Amplifier, Part 1 by John Clarke
  6. Subscriptions
  7. Feature: The History of Transistors, Pt2 by Ian Batty
  8. Project: Railway Semaphore Signal by Les Kerr
  9. Feature: ElectroneX by AEE
  10. Project: Update: SMD Test Tweezers by Tim Blythman
  11. Feature: New 8-bit PICs from Microchip by Tim Blythman
  12. Feature: Dick Smith Contest Results by Nicholas Vinen
  13. Serviceman's Log: Gaining a superpower, at least temporarily by Dave Thompson
  14. PartShop
  15. Project: Capacitor Discharge Welder, Pt2 by Phil Prosser
  16. Vintage Radio: Monopole D225 radio by Associate Professor Graham Parslow
  17. Market Centre
  18. Advertising Index
  19. Notes & Errata: Dual Hybrid Power Supply, February 2022; Solid-State Tesla Coil, February 2022; Mysterious Mickey Oz, January 2022; Remote Control Range Extender, January 2022
  20. Outer Back Cover

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

You can view 47 of the 120 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.

Items relevant to "500W Power Amplifier, Part 1":
  • 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)
  • Amplifier Clipping Indicator (March 2022)
  • 500W Power Amplifier, Part 1 (April 2022)
  • 500W Power Amplifier, Part 2 (May 2022)
  • 500W Power Amplifier, Part 3 (June 2022)
Articles in this series:
  • The History of Transistors, part one (March 2022)
  • The History of Transistors, Pt2 (April 2022)
  • The History of Transistors, Pt3 (May 2022)
Items relevant to "Railway Semaphore Signal":
  • Model Railway Semaphore Signal control PCB [09103221] (AUD $2.50)
  • Model Railway Semaphore Signal blade PCB [09103222] (AUD $2.50)
  • PIC16F88-I/P programmed for the Model Railway Semaphore Signal [0910322A.HEX] (Programmed Microcontroller, AUD $15.00)
  • Firmware for the Model Railway Semaphore Signal [0910322A.HEX] (Software, Free)
  • Model Railway Semaphore Signal PCB patterns (PDF download) [09103221-2] (Free)
Items relevant to "Update: SMD Test Tweezers":
  • SMD Test Tweezers PCB set [04106211+04106212] (AUD $10.00)
  • PIC16F15214-I/SN programmed for the Improved SMD Test Tweezers [0410621B.HEX] (Programmed Microcontroller, AUD $10.00)
  • 64x32 white OLED screen (0.49-inch, 1.25cm diagonal) (Component, AUD $10.00)
  • Improved SMD Test Tweezers kit (Component, AUD $35.00)
  • Firmware for the Improved SMD Test Tweezers [0410621B.HEX] (Software, Free)
  • SMD Test Tweezers PCB patterns (PDF download) [04106211/2] (Free)
Items relevant to "Capacitor Discharge Welder, Pt2":
  • Capacitor Discharge Welder Power Supply PCB [29103221] (AUD $5.00)
  • Capacitor Discharge Welder Control PCB [29103222] (AUD $5.00)
  • Capacitor Discharge Welder Energy Storage Module PCB [29103223] (AUD $3.50)
  • IRFB7434(G)PBF‎ N-channel high-current Mosfet (Source component, AUD $5.00)
  • Hard-to-get parts & PCB for the Capacitor Discharge Welder Power Supply (Component, AUD $25.00)
  • Validation spreadsheets and updated drilling diagram for the CD Spot Welder (Software, Free)
  • Capacitor Discharge Welder PCB patterns (PDF download) [29103221-3] (Free)
Articles in this series:
  • Capacitor Discharge Welder, part one (March 2022)
  • Capacitor Discharge Welder, Pt2 (April 2022)

Purchase a printed copy of this issue for $11.50.

MARKET CENTRE Advertise your product or services here in Silicon Chip FOR SALE FOR SALE KIT ASSEMBLY & REPAIR LEDsales DAVE THOMPSON (the Serviceman from Silicon Chip) is available to help you with kit assembly, project troubleshooting, general electronics and custom design work. No job too small. Based in Christchurch, NZ but service available Australia/NZ wide. Email dave<at>davethompson.co.nz LEDs and accessories for the DIY enthusiast PMD WAY offers (almost) everything for the electronics enthusiast – with full warranty, technical support and free delivery worldwide. Visit pmdway.com to get started. SILICON CHIP ASSORTED BOOKS FOR $5 EACH Selling assorted books on electronics and other related subjects – condition varies. Some of the books may have already been sold, but most are still available. Bulk discount available; post or pickup. All books can be viewed at: siliconchip.com.au/link/aawx Email for a postage quote, quote the number directly below the photo when referring to a book: silicon<at>siliconchip.com.au LEDs, BRAND NAME AND GENERIC LEDs. Heatsinks, LED drivers, power supplies, LED ribbon, kits, components, hardware – www.ledsales.com.au TRONIXLABS PTY LTD would like to thank all of our customers for their support and feedback. For any enquiries or customer technical support, please email support<at>tronixlabs.com PCB PRODUCTION PCB MANUFACTURE: single to multilayer. Bare board tested. One-offs to any quantity. 48 hour service. Artwork design. Excellent prices. Check out our specials: www.ldelectronics.com.au KEITH RIPPON KIT ASSEMBLY & REPAIR: * Australia & New Zealand; * Small production runs. Phone Keith: 0409 662 794 keith.rippon<at>gmail.com Where do you get those HARD-TO-GET PARTS? Where possible, the SILICON CHIP On-Line Shop stocks hard-to-get project parts, along with PCBs, programmed micros, panels and all the other bits and pieces to enable you to complete your SILICON CHIP project. SILICON CHIP On-Line SHOP www.siliconchip.com.au/shop ADVERTISING IN MARKET CENTRE Classified Ad Rates: $32.00 for up to 20 words (punctuation not charged) plus $1.20 for each additional word. Display ads in Market Centre (minimum 2cm deep, maximum 10cm deep): $82.50 per column centimetre per insertion. All prices include GST. Closing date: 5 weeks prior to month of sale. To book, email the text to silicon<at>siliconchip.com.au and include your name, address & credit card details, or phone Glyn (02) 9939 3295 or 0431 792 293. WARNING! Silicon Chip magazine regularly describes projects which employ a mains power supply or produce high voltage. All such projects should be considered dangerous or even lethal if not used safely. Readers are warned that high voltage wiring should be carried out according to the instructions in the articles. When working on these projects use extreme care to ensure that you do not accidentally come into contact with mains AC voltages or high voltage DC. If you are not confident about working with projects employing mains voltages or other high voltages, you are advised not to attempt work on them. Silicon Chip Publications Pty Ltd disclaims any liability for damages should anyone be killed or injured while working on a project or circuit described in any issue of Silicon Chip magazine. Devices or circuits described in Silicon Chip may be covered by patents. Silicon Chip disclaims any liability for the infringement of such patents by the manufacturing or selling of any such equipment. Silicon Chip also disclaims any liability for projects which are used in such a way as to infringe relevant government regulations and by-laws. Advertisers are warned that they are responsible for the content of all advertisements and that they must conform to the Competition & Consumer Act 2010 or as subsequently amended and to any governmental regulations which are applicable. siliconchip.com.au Australia's electronics magazine April 2022  119