Silicon ChipAdvertising Index - June 2022 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: Shutting down our old website
  4. Mailbag
  5. Feature: IC Fabrication, Part 1 by Dr David Maddison
  6. Project: Spectral Sound MIDI Synthesiser by Jeremy Leach
  7. Feature: Radar Coach Speed Detector by Allan Linton-Smith
  8. Project: Buck-Boost LED Driver by Tim Blythman
  9. Project: Arduino Programmable Load by Tim Blythman
  10. Project: 500W Power Amplifier, Part 3 by John Clarke
  11. Feature: MOS Air Quality Sensors by Jim Rowe
  12. Project: Revised Battery Charge Controller by John Clarke
  13. Review: Altium Designer 22 by Tim Blythman
  14. Circuit Notebook: RF burst power meter by George Mackiewicz
  15. Circuit Notebook: Artificial candle is ‘ignited’ by a real flame by Aarav Garg
  16. Circuit Notebook: Digital volume control using discrete logic by John Clarke & Raj. K. Gorkhali
  17. Circuit Notebook: An easy way to measure SMDs by Michael Harvey
  18. Serviceman's Log: Ion with the wind by Dave Thompson
  19. Vintage Radio: Admiral 19A11S TV by Dr Hugo Holden
  20. PartShop
  21. Ask Silicon Chip
  22. Market Centre
  23. Advertising Index
  24. Notes & Errata: 500W Power Amplifier pt2, May 2022; Model Railway Semaphore Signal, April 2022
  25. Outer Back Cover

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

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Items relevant to "":
  • PIC16F88 migration document (PDF) (Software, Free)
Articles in this series:
  • IC Fabrication, Part 1 (June 2022)
  • IC Fabrication, Part 2 (July 2022)
Items relevant to "Spectral Sound MIDI Synthesiser":
  • Spectral Sound MIDI Synthesiser PCB [01106221] (AUD $7.50)
  • Short form kit for the Spectral Sound MIDI Synthesiser (Component, AUD $200.00)
  • Software, firmware & documentation for the Spectral Sound MIDI Synthesiser (Free)
  • Spectral Sound MIDI Synthesiser PCB pattern (PDF download) [01106221] (Free)
  • Front & lid panel labels and drilling diagram for the Spectal Sound MIDI Synthesiser (Panel Artwork, Free)
Items relevant to "Buck-Boost LED Driver":
  • High Power Buck-Boost LED Driver PCB [16103221] (AUD $5.00)
  • 70W COB LED panel - cool white (6000-6500K) (Component, AUD $19.50)
  • 70W COB LED panel - warm white (3000-3200K) (Component, AUD $19.50)
  • Complete kit for the High Power Buck-Boost LED Driver (Component, AUD $80.00)
  • High Power Buck-Boost LED Driver PCB pattern (PDF download) [16103221] (Free)
Items relevant to "Arduino Programmable Load":
  • Arduino Programmable Load PCB [04105221] (AUD $5.00)
  • Firmware for the Arduino-based Programmable Load (Software, Free)
  • Arduino Programmable Load PCB pattern (PDF download) [04105221] (Free)
Items relevant to "500W Power Amplifier, Part 3":
  • 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)
Items relevant to "MOS Air Quality Sensors":
  • Sample sketches for MOS Air Quality Sensors (Software, 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)
Items relevant to "Revised Battery Charge Controller":
  • Revised Intelligent Battery Charge Controller PCB [14107192] (AUD $7.50)
  • PIC16F88-I/P programmed for the Universal Battery Charge Controller [1410719A.HEX] (Programmed Microcontroller, AUD $15.00)
  • Relay - EA2-5NU (Component, AUD $3.00)
  • IPP80P03P4L-07 high-current P-channel Mosfet (Component, AUD $2.50)
  • Firmware and source code for the Universal Battery Charge Controller [1410719A.HEX] (Software, Free)
  • Revised Battery Charge Controller PCB pattern (PDF download) [14107192] (Free)
  • Universal Battery Charge Controller front panel artwork (PDF download) (Free)
Articles in this series:
  • Have you got a dumb battery charger in your garage? (December 2019)
  • Revised Battery Charge Controller (June 2022)
Items relevant to "RF burst power meter":
  • Firmware for the RF burst power meter (Software, Free)
Items relevant to "Artificial candle is ‘ignited’ by a real flame":
  • Firmware for the Artificial candle using a real flame (Software, Free)

Purchase a printed copy of this issue for $8.50.

Altronics.................................77-80 Dave Thompson........................ 111 Digi-Key Electronics...................... 3 element14..................................... 7 Emona Instruments.................. IBC Hare & Forbes............................... 9 Jaycar.............................. IFC,53-60 Keith Rippon Kit Assembly....... 111 Lazer Security........................... 111 LD Electronics........................... 111 LEDsales................................... 111 Microchip Technology.................. 5 Mouser Electronics..................OBC Ocean Controls........................... 11 Silicon Chip Shop............ 106-107 The Loudspeaker Kit.com.......... 10 Tronixlabs.................................. 111 Wagner Electronics..................... 97 way to modify it to run by default using 15.5 as the target ratio. Would this require changing the wideband sensor? (P. F., Willoughby, NSW) ● The sensor actually measures the lambda value, and the air/fuel ratio is calculated from that. That means the same sensor and controller will work fine regardless of whether you are using petrol or LPG. It will show a lambda of 1.0 if the mixture is stoichiometric, irrespective of the actual air:fuel ratio of the fuel being burned. Oxygen sensors measure whether the exhaust has excess oxygen (lean) or no oxygen and unburnt fuel (rich) or completely burnt fuel with no oxygen leftover (stoichiometric). The sensor does not actually measure the air/ fuel ratio directly. If you want to display the air/fuel ratio rather than the lambda value, the unit needs to know the stoichiometric ratio for the fuel you are currently using. The problem is that the fuel type could change. Since you usually use LPG, you could just set that to 15.5:1 and realise that the readings displayed when running on petrol will be 5.5% too high. But the engine won’t care since 112 Silicon Chip Running appliances from higher voltages I would like to request assistance regarding a Panasonic hair dryer made in Japan. It is labelled as 100V 1200W. Can I run this from 110V AC? I can plug it into a 110V outlet, but in the long run, the motor will fail. Could I use a Triac-based circuit? Thank you very much. (D. H., Taipei, Taiwan) ● One method is to use a transformer to reduce the mains voltage, as in our Mains Moderator project (March 2011; siliconchip.com.au/Article/937). The secondary windings are wired in series with the primary but out-of-phase. The result is that the secondary voltage is subtracted from the original mains voltage before being applied to the load. That circuit was designed for the Australian mains voltage, nominally 230V AC. But the same applies to your 110V supply if you use a suitably-rated transformer with a 10V or 12V tapping to reduce the mains voltage by that amount. Note that the 1200W hair dryer draws up to 12A (assuming most of the load is the resistive heater element), so the transformer would need to have a secondary current rating of at least 12A. That’s a large transformer. An alternative is to use two strings of around 10 diodes, one set for either mains polarity, to drop the 10V. But the diodes would need to be rated for 12A and preferably 20A, meaning they would need to be substantial devices. Either circuit would need to be installed in a suitable Earthed enclosure with the correct input and output plugs and sockets. The diodes would need heatsinking to the case and isolated electrically. You could use a phase controller Errata and Next Issue Advertising Index it’s using the lambda value. Note that the air/fuel ratio also varies depending on the fuel grade. So it’s better just to show the lambda value as it will always be correct. with a Triac. We don’t have a circuit that would work at 110V AC, as our designs are for 230V AC and wouldn’t be powered sufficiently. Also, most of our designs are rated for 10A rather than the 12A required for the hair dryer. Also note that the Triac would reduce the RMS voltage, but the peak of the 110V waveform would still be applied to the motor. If you can get a 110V AC rated Triac-based dimmer that can handle 12A or more, you could use that. But we think you might find it easier (and possibly cheaper) to purchase a 110V-rated hair dryer. Is Playmaster 136 up to modern standards? I would like to know if the Playmaster 136 preamp could be used in an Ultra Low Distortion Amplifier, primarily because I’m running out of funds and would like to still be able to use my record player. (M. G. M., Trott Park, SA) ● The Playmaster 136 is from the 1970s era and has a poor signal-tonoise ratio and high distortion compared to anything we have published recently. You could use it, but it wouldn’t be doing the amplifier justice. Given your limited budget, consider building the Ultra Low Noise Remote Controlled Stereo Preamp (March & April 2019; siliconchip.au/Series/333) without the input switcher and using a standard 16mm potentiometer in place of the motorised pot. You can then omit the microcontroller, 5V regulator and all components in that section. You could still use our PCB. That would give you a preamp with excellent performance that you could probably build for around $40 (depending on where you get the parts, which exact parts you use etc). It doesn’t have a built-in RIAA preamp but you can get an external RIAA premap for your turntable from Jaycar for $21.95 (Cat AC1649). SC 500W Power Amplifier pt2, May 2022: inductor L1 is wound using 13.5 turns of 1.25mm diameter wire, not 30.5 turns of 1mm diameter as stated in two places on p64 & p65. Around 900mm of wire will be consumed. Model Railway Semaphore Signal, April 2022: trimpots VR1 & VR2 are 1kW, not 10kW as shown in Fig.8 on p56. Next Issue: the July 2022 issue is due on sale in newsagents by Monday, June 27th. Expect postal delivery of subscription copies in Australia between June 27th and July 11th. Australia's electronics magazine siliconchip.com.au