Silicon ChipMarket Centre - December 2025 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Dutch government fumbles with Nexperia
  4. Product Showcase
  5. PartShop
  6. Feature: Humanoid Robots, Part 2 by Dr David Maddison, VK3DSM
  7. Feature: Power Electronics, Part 2 by Andrew Levido
  8. Project: RGB LED Star Ornament by Nicholas Vinen
  9. Feature: How to Design PCBs, Part 1 by Tim Blythman
  10. Project: Earth Radio, Part 1 by John Clarke
  11. Project: DCC Decoder by Tim Blythman
  12. Project: Digital Preamplifier, Part 3 by Phil Prosser
  13. Serviceman's Log: The Bad Old Days by Dave Thompson
  14. Vintage Radio: BC-211 Frequency Meter by Ian Batty
  15. Market Centre
  16. Advertising Index
  17. Notes & Errata: Digital Preamplifier, part one, October 2025; Serviceman’s Log, October 2025
  18. Outer Back Cover

This is only a preview of the December 2025 issue of Silicon Chip.

You can view 35 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:
  • Humanoid Robots, Part 1 (November 2025)
  • Humanoid Robots, Part 2 (December 2025)
Articles in this series:
  • Power Electronics, Part 1 (November 2025)
  • Power Electronics, Part 2 (December 2025)
Items relevant to "RGB LED Star Ornament":
  • RGB LED Star PCB [16112251] (AUD $12.50)
  • PIC16F18126-I/SL programmed for the RGB LED Star [1611225A.HEX] (Programmed Microcontroller, AUD $10.00)
  • AP5002SG buck regulator IC (SOIC-8) (Component, AUD $5.00)
  • RGB LED Star kit (Component, AUD $80.00)
  • RGB LED Star firmware [1611225A.HEX] (Software, Free)
  • RGB LED Star PCB pattern (PDF download) [16112251] (Free)
Items relevant to "Earth Radio, Part 1":
  • Earth Radio PCB [06110251] (AUD $5.00)
  • Earth Radio short-form kit (Component, AUD $55.00)
  • Earth Radio PCB pattern (PDF download0 [06110251] (Free)
  • Earth Radio panel artwork, drilling and antenna construction diagrams (Free)
Items relevant to "DCC Decoder":
  • DCC Decoder PCB [09111241] (AUD $2.50)
  • PIC16F18126-I/SL programmed for the DCC Decoder [0911124A.HEX] (Programmed Microcontroller, AUD $10.00)
  • DCC Decoder kit (Component, AUD $25.00)
  • DCC Decoder Star firmware [0911124A.HEX] (Software, Free)
  • DCC Decoder PCB pattern (PDF download) [09111241] (Free)
Items relevant to "Digital Preamplifier, Part 3":
  • Digital Preamplifier main PCB [01107251] (AUD $30.00)
  • Digital Preamplifier front panel control PCB [01107252] (AUD $2.50)
  • Digital Preamplifier power supply PCB [01107253] (AUD $7.50)
  • PIC32MX270F256D-50I/PT‎ programmed for the Digital Preamplifier/Crossover [0110725A.HEX] (Programmed Microcontroller, AUD $20.00)
  • Firmware for the Digital Preamplifier/Crossover (Software, Free)
  • Digital Preamplifier/Crossover PCB patterns (PDF download) [01107251-3] (Free)
  • 3D printing files for the Digital Preamplifier/Crossover (Panel Artwork, Free)
  • Digital Preamplifier/Crossover case drilling diagrams (Panel Artwork, Free)
Articles in this series:
  • Digital Preamp & Crossover (October 2025)
  • Digital Preamp & Crossover, Pt2 (November 2025)
  • Digital Preamplifier, Part 3 (December 2025)

Purchase a printed copy of this issue for $14.00.

MARKET CENTRE Advertise your product or services here in Silicon Chip KIT ASSEMBLY & REPAIR FOR SALE 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, New Zealand, but service available Australia/NZ wide. Email dave<at>davethompson.co.nz LEDsales KEITH RIPPON KIT ASSEMBLY & REPAIR: * Australia & New Zealand; * Small production runs. Phone Keith: 0409 662 794 keith.rippon<at>gmail.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 USB-C Power Monitor August-September 2025 LEDS, BRAND NAME AND GENERIC LEDs, filament LEDs, LED drivers, heatsinks, power supplies, kits and modules, components, breadboards, hardware, magnets. Please visit www. ledsales.com.au PMD WAY offers (almost) everything for the electronics enthusiast – with full warranty, technical support and free delivery worldwide. Visit pmdway.com to get started. Short-Form Kit SC7489: $60 siliconchip.au/Series/445 This kit includes all non-optional parts, except the case, lithium-ion cell and glue. It does include the FFC (flat flexible cable) PCB. OATLEY ELECTRONICS HAS CEASED NORMAL OPERATION. We have a huge number of components including LED modules, LED assemblies, valves, small solar panels, small stepper motors etc to sell at great prices. For more info or an inspection (near Woy Woy, NSW Central Coast) call Branko – 0428 600 036 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 (02) 9939 3295. 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 December 2025  103