Silicon ChipMarket Centre - May 2016 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Publisher's Letter: The visual spectacle of thunderstorms and auroras
  4. Feature: Atmospheric Electricity: Nature’s Spectacular Fireworks by Dr. David Maddison
  5. Feature: How To Convert Analog Video Tapes To Digital Format by Greg Swain
  6. Project: Budget Senator 2-Way Loudspeaker System by Allan Linton-Smith
  7. PartShop
  8. Review: USB Cameras: Use Them With Your Smartphone by Leo Simpson
  9. Serviceman's Log: Re-keyboarding a Yamaha electric piano by Dave Thompson
  10. Project: 230/115VAC, 50/60Hz Precision Turntable Driver by John Clarke
  11. Project: 4-Input Temperature Sensor PCB For The Raspberry Pi by Nicholas Vinen & Greg Swain
  12. Project: Arduino-Based Multifunction Measuring Meter, Pt.2 by Jim Rowe
  13. Product Showcase
  14. Vintage Radio: The 1948 AWA model 517M mantel radio by Associate Professor Graham Parslow
  15. Subscriptions
  16. PartShop
  17. Market Centre
  18. Notes & Errata: Automatic Starter Circuit for Cars, Circuit Notebook, April 2016

This is only a preview of the May 2016 issue of Silicon Chip.

You can view 42 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.

Items relevant to "Budget Senator 2-Way Loudspeaker System":
  • 2-Way Passive Crossover PCB [01205141] (AUD $20.00)
  • Acrylic pieces to make two inductor bobbins (Component, AUD $7.50)
  • 2-Way Passive Loudspeaker Crossover PCB pattern (PDF download) [01205141] (Free)
Articles in this series:
  • Budget Senator 2-Way Loudspeaker System (May 2016)
  • Budget Senator 2-Way Loudspeaker System (May 2016)
  • Budget Senator 2-Way Loudspeaker System, Pt.2 (June 2016)
  • Budget Senator 2-Way Loudspeaker System, Pt.2 (June 2016)
Items relevant to "230/115VAC, 50/60Hz Precision Turntable Driver":
  • 230/115VAC, 50/60Hz Precision Turntable Motor Driver PCB [04104161] (AUD $15.00)
  • PIC16F88-I/P programmed for the 230/115VAC, 50/60Hz Precision Turntable Motor Driver [0410416A.HEX] (Programmed Microcontroller, AUD $15.00)
  • Firmware (ASM and HEX) files for the 230/115VAC, 50/60Hz Precision Turntable Motor Driver [0410416A.HEX] (Software, Free)
  • 230/115VAC, 50/60Hz Precision Turntable Motor Driver PCB pattern (PDF download) [04104161] (Free)
  • 230/115VAC, 50/60Hz Precision Turntable Motor Driver lid panel artwork (PDF download) (Free)
Items relevant to "4-Input Temperature Sensor PCB For The Raspberry Pi":
  • 4-input Temperature Sensor PCB for the Raspberry Pi [24104161] (AUD $5.00)
  • Two BSO150N03 dual SMD Mosfets plus a 4.7kΩ M3216/1206 resistor (Component, AUD $5.00)
  • Scripts and configuration file for Raspberry Pi 4-input Temperature Sensor (Software, Free)
  • 4-input Temperature Sensor PCB pattern for the Raspberry Pi (PDF download) [24104161] (Free)
Items relevant to "Arduino-Based Multifunction Measuring Meter, Pt.2":
  • Arduino Multifunction Meter (MFM) PCBs [04116011/2] (AUD $15.00)
  • SMD resistors, capacitors and diodes for Arduino Multifunction Meter (MFM) (Component, AUD $25.00)
  • Arduino sketch, Windows installer & source code for the Arduino Multifunction Meter (MFM) (Software, Free)
  • Arduino Multifunction Meter (MFM) PCB patterns (PDF download) [04116011/2] (Free)
  • Arduino Multifunction Meter (MFM) cutting details and panel label artwork (PDF download) (Panel Artwork, Free)
Articles in this series:
  • Arduino Multifunction 24-Bit Measuring Shield (April 2016)
  • Arduino Multifunction 24-Bit Measuring Shield (April 2016)
  • Arduino-Based Multifunction Measuring Meter, Pt.2 (May 2016)
  • Arduino-Based Multifunction Measuring Meter, Pt.2 (May 2016)

Purchase a printed copy of this issue for $10.00.

MARKET CENTRE Cash in your surplus gear. Advertise it here in SILICON CHIP Announcing Pioneer Hill Software FOR SALE SpectraPLUS 24bit DAQ ADC spectrogram, t.h.d. and i.m.d. analysis, f.f.t, acoustic tools, 3D surface plot, sig. gen. etc. Fully shielded SpecctraDAQ200 ADC/DAC 24bit/192kHz dual channel, Wolfson. AKM converters … USB3 interface to laptop/PC As 2ch. 24bit recorder t.h.d. = 0.002%max see : www.spectraplus.com Order direct, USA contact : John Pattee (pioneer<at>spectraplus.com) Local agent : DSCAPE Melbourne s/w , h/w package ca. USD $1500 Aus. Distributor : Julian Driscoll CEO jcdrisc<at>tpg.com.au for support TALK TO THE WORLD: get into Ham Radio. Study for the Standard or Advanced Licence with my books. Graeme Scott, VK2KE. Visit www.gscott.com. au Albury, NSW 2640. PCBs MADE, ONE OR MANY. Any format, hobbyists welcome. Sesame Electronics Phone 0434 781 191. sesame<at>sesame.com.au www.sesame.com.au tronixlabs.com - Australia’s best value for hobbyist and enthusiast electronics from adafruit, DFRobot, Freetronics, Raspberry Pi, Seeedstudio and more, with same-day shipping. LEDs, BRAND NAME and generic LEDs. Heatsinks, fans, LED drivers, power supplies, LED ribbon, kits, components, hardware, EL wire. www. ledsales.com.au PCB MANUFACTURE: single to multi­ layer. Bare board tested. One-offs to any quantity. 48 hour service. Artwork design. Excellent prices. Check out our specials: www.ldelectronics.com.au PCBs & Micros: SILICON CHIP can supply PCBs and programmed microcontrollers and other specialist parts for recent projects and some not so recent projects. Visit the SILICON CHIP Online Shop at www.siliconchip.com.au to place your order or phone (02) 9939 3295. KIT ASSEMBLY & REPAIR VINTAGE RADIO REPAIRS: electrical mechanical fitter with 36 years ex­ perience and extensive knowledge of valve and transistor radios. Professional and reliable repairs. All workmanship guaranteed. $10 inspection fee plus charges for parts and labour as required. Labour fees $35 p/h. Pensioner discounts available on application. Contact Alan on 0425 122 415 or email bigal radioshack<at>gmail.com KEITH RIPPON KIT ASSEMBLY & REPAIR: * Australia & New Zealand; * Small production runs. Phone Keith 0409 662 794. keith.rippon<at>gmail.com 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. Phone NZ (+64 3) 366 6588 or email dave<at> davethompson.co.nz ADVERTISING IN MARKET CENTRE Classified Ad Rates: $32.00 for up to 20 words plus 95 cents 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. Ask SILICON CHIP . . . continued from page 102 different types and even between individual LEDs in a batch. We can’t see any problems with what you are suggesting. The 220kΩ resistor gives LED2 a little under 1mA. The design assumes it has a fairly high efficiency to give sufficient brightness with so litsiliconchip.com.au tle current, which is true of many red LEDs but perhaps not yours. There are two limits on how low a resistor value you can use: the LED’s current rating and the resistor’s power rating. The LED current rating would not be exceeded unless the resistor value was less than 22kΩ so that is unlikely to be a problem. The resistor dissipation is going to be roughly 265V2 ÷ R. That’s 320mW for the specified 220kΩ resistor, which has a rating of 1W. So you could reduce the value to as low as 100kΩ, resulting in a dissipation of around 700mW. That would more than double the LED current and should increase the brightness sufficiently. You can use 180kΩ or the parallel 1MΩ resistor if you only need a slight increase in brightness. If you use the parallel resistor approach, make sure May 2016  103