Silicon ChipOuter Front Cover - March 2022 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: RIP Brendan James Akhurst, cartoonist extraordinaire
  4. Mailbag
  5. Feature: The History of Transistors, part one by Ian Batty
  6. Project: Capacitor Discharge Welder, part one by Phil Prosser
  7. Project: Raspberry Pi Pico BackPack by Tim Blythman
  8. Feature: All About Batteries, part three by Dr David Maddison
  9. Serviceman's Log: The oven with a mind of its own by Dave Thompson
  10. Project: Amplifier Clipping Indicator by John Clarke
  11. Circuit Notebook: An alternative version of the Arduino Power Supply by Stephen Gordon
  12. Circuit Notebook: Illuminated doorbell press switch circuit by David Worboys
  13. Circuit Notebook: Reading three digital signals with a two-channel oscilloscope by John Rich
  14. Feature: Advances in Drone Technology by Bob Young
  15. Project: Dual Hybrid Power Supply, part two by Phil Prosser
  16. Feature: A Gesture Recognition Module by Jim Rowe
  17. Vintage Radio: Phenix Ultradyne L-2 by Dennis Jackson
  18. PartShop
  19. Ask Silicon Chip
  20. Market Centre
  21. Advertising Index
  22. Notes & Errata: Vintage Radio, February 2022; USB Cable Tester, November & December 2021
  23. Outer Back Cover

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

You can view 0 of the 112 pages in the full issue.

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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 "Capacitor Discharge Welder, part one":
  • 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)
Items relevant to "Raspberry Pi Pico BackPack":
  • Raspberry Pi Pico BackPack PCB [07101221] (AUD $5.00)
  • DS3231MZ real-time clock IC (SOIC-8) (Component, AUD $10.00)
  • DS3231 real-time clock IC (SOIC-16) (Component, AUD $7.50)
  • 3.5-inch TFT Touchscreen LCD module with SD card socket (Component, AUD $35.00)
  • Raspberry Pi Pico BackPack kit (Component, AUD $80.00)
  • Matte/Gloss Black UB3 Lid for Advanced GPS Computer (BackPack V3) or Pico BackPack (PCB, AUD $5.00)
  • Matte/Gloss Black UB3 Lid for Micromite LCD BackPack V3 or Pico BackPack using 3.5in screen (PCB, AUD $5.00)
  • Raspberry Pi Pico BackPack software (Free)
  • Raspberry Pi Pico BackPack PCB pattern (PDF download) [07101221] (Free)
Articles in this series:
  • All About Batteries - Part 1 (January 2022)
  • All About Batteries – Part 2 (February 2022)
  • All About Batteries, part three (March 2022)
Items relevant to "Amplifier Clipping Indicator":
  • 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)
  • Amplifier Clipping Indicator PCB [01112211] (AUD $2.50)
  • Amplifier Clipping Indicator PCB pattern (PDF download) [01112211] (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)
Items relevant to "Dual Hybrid Power Supply, part two":
  • Intelligent Dual Hybrid Power Supply PCB set (AUD $25.00)
  • Intelligent Dual Hybrid Power Supply regulator PCB [18107211] (AUD $7.50)
  • Intelligent Dual Hybrid Power Supply front panel control PCB [18107212] (AUD $2.50)
  • PIC32MZ2048EFH064-250I/PT programmed for the Intelligent Dual Hybrid Power Supply [0110619A.HEX] (Programmed Microcontroller, AUD $30.00)
  • 128x64 Blue LCD screen with KS0108-compatible controller (Component, AUD $30.00)
  • Hard-to-get parts for the Intelligent Dual Hybrid Power Supply regulator board (Component, AUD $125.00)
  • Hard-to-get parts for the Intelligent Dual Hybrid Power Supply CPU board (Component, AUD $60.00)
  • LCD panel bezel for the Dual Intelligent Hybrid Power Supply (PCB, AUD $5.00)
  • Intelligent Dual Hybrid Power Supply firmware [0110619A.HEX] (Software, Free)
  • Intelligent Dual Hybrid Power Supply PCB patterns [18107211/2] (Free)
  • DSP Active Crossover/DDS/Reflow Oven PCB patterns (PDF download) [01106191-6] (AUD $3.00)
Articles in this series:
  • Dual Hybrid Power Supply – Pt1 (February 2022)
  • Dual Hybrid Power Supply, part two (March 2022)
Items relevant to "A Gesture Recognition Module":
  • MMbasic software for the PAJ7620U2 gesture recognition module (Free)
Articles in this series:
  • El Cheapo Modules From Asia - Part 1 (October 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 4 (February 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 7: LED Matrix displays (June 2017)
  • El Cheapo Modules: Li-ion & LiPo Chargers (August 2017)
  • El Cheapo modules Part 9: AD9850 DDS module (September 2017)
  • El Cheapo Modules Part 10: GPS receivers (October 2017)
  • El Cheapo Modules 11: Pressure/Temperature Sensors (December 2017)
  • El Cheapo Modules 12: 2.4GHz Wireless Data Modules (January 2018)
  • El Cheapo Modules 13: sensing motion and moisture (February 2018)
  • El Cheapo Modules 14: Logarithmic RF Detector (March 2018)
  • El Cheapo Modules 16: 35-4400MHz frequency generator (May 2018)
  • El Cheapo Modules 17: 4GHz digital attenuator (June 2018)
  • El Cheapo: 500MHz frequency counter and preamp (July 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 21: stamp-sized audio player (December 2018)
  • El Cheapo Modules 22: Stepper Motor Drivers (February 2019)
  • El Cheapo Modules 23: Galvanic Skin Response (March 2019)
  • El Cheapo Modules: Class D amplifier modules (May 2019)
  • El Cheapo Modules: Long Range (LoRa) Transceivers (June 2019)
  • El Cheapo Modules: AD584 Precision Voltage References (July 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: 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, Part 2 (June 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: LCR-T4 Digital Multi-Tester (February 2021)
  • El Cheapo Modules: USB-PD chargers (July 2021)
  • El Cheapo Modules: USB-PD Triggers (August 2021)
  • El Cheapo Modules: 3.8GHz Digital Attenuator (October 2021)
  • El Cheapo Modules: 6GHz Digital Attenuator (November 2021)
  • El Cheapo Modules: 35MHz-4.4GHz Signal Generator (December 2021)
  • El Cheapo Modules: LTDZ Spectrum Analyser (January 2022)
  • Low-noise HF-UHF Amplifiers (February 2022)
  • A Gesture Recognition Module (March 2022)
  • Air Quality Sensors (May 2022)
  • MOS Air Quality Sensors (June 2022)
  • PAS CO2 Air Quality Sensor (July 2022)

Purchase a printed copy of this issue for $11.50.
MARCH 2022 ISSN 1030-2662 03 9 771030 266001 $ 50* NZ $1290 11 24 Capacitor Discharge Spot Welder 35 Raspberry Pi Pico LCD BackPack 68 Amplifier Clipping Indicator 79 Advances in Drone Technology 96 Module: Gesture Recognition INC GST INC GST The History & Manufacture of TRANSISTORS siliconchip.com.au Australia's electronics magazine March 2022  1