Silicon ChipOuter Front Cover - April 2022 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Writing clealy and concisely
  4. Mailbag
  5. Feature: Geiger Counters and Radiation by Dr David Maddison
  6. Project: 500W Power Amplifier, Part 1 by John Clarke
  7. Subscriptions
  8. Feature: The History of Transistors, Pt2 by Ian Batty
  9. Project: Railway Semaphore Signal by Les Kerr
  10. Feature: ElectroneX by AEE
  11. Project: Update: SMD Test Tweezers by Tim Blythman
  12. Feature: New 8-bit PICs from Microchip by Tim Blythman
  13. Feature: Dick Smith Contest Results by Nicholas Vinen
  14. Circuit Notebook: Very simple adjustable electronic load by Jon Kirkwood
  15. Circuit Notebook: Three reaction time games by Mahmood Alimohammadi
  16. Circuit Notebook: NBN backup battery by Robert Budniak
  17. Serviceman's Log: Gaining a superpower, at least temporarily by Dave Thompson
  18. PartShop
  19. Project: Capacitor Discharge Welder, Pt2 by Phil Prosser
  20. Vintage Radio: Monopole D225 radio by Associate Professor Graham Parslow
  21. Ask Silicon Chip
  22. Market Centre
  23. Advertising Index
  24. 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
  25. Outer Back Cover

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

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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 $200.00)
  • 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 Two (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)
Videos relevant to "Railway Semaphore Signal":
  • Model Railway Semaphore Signal
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 "Three reaction time games":
  • Firmware and source code for Three Reaction Time Games (Software, 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 $2.50)
  • IRFB7434(G)PBF‎ N-channel high-current Mosfet (Source component, AUD $5.00)
  • Hard-to-get parts & PCB for the Capacitor Discharge Welder Energy Storage Module (ESM) (Component, AUD $20.00)
  • Hard-to-get parts & PCB for the Capacitor Discharge Welder Power Supply (Component, AUD $25.00)
  • Validation spreadsheets 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.
APRIL 2022 ISSN 1030-2662 04 9 771030 266001 $ 50* NZ $1290 11 500 INC GST POWER WATTS AMPLIFIER DELIVERS 500W RMS INTO A 4Ω LOAD The History of Transistors Part Two siliconchip.com.au Geiger Counters and Measuring Radioactivity Australia's electronics magazine April 2022  1 Rosehill Gardens , Sydney – 5-6 A pril INC GST