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MARKET CENTRE Cash in your surplus gear. Advertise it here in SILICON CHIP FOR SALE 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 MADE, ONE OR MANY. Any format, hobbyists welcome. Sesame Electronics Phone 0434 781 191. sesame<at>sesame.com.au www.sesame.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: www.siliconchip.com.au 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. KEEP YOUR COPIES OF AS GOOD AS THE DAY THEY WERE BORN! ONLY 95 $ 1P6LUS p&p A superb-looking SILICON CHIP binder will keep your magazines in pristine condition. * Holds up to 14 issues * Heavy duty vinyl * Easy wire inserts ORDER NOW AT www.siliconchip.com.au/shop Based in Christchurch, NZ but service available Australia/NZ wide. Phone NZ (+64 3) 366 6588 or email dave<at> davethompson.co.nz POSITION VACANT RETIRED AND BORED? Do you have an electronics background and feel your talents are being wasted? A unique opportunity to be involved in a modern manufacturing facility in China for six months internship with all expenses paid. Interested? More details homepin.com/intern.html 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 94 2-cylinder engine, circa 1940. (J. S., via email). •  The article is available at www. siliconchip.com.au/Issue/2008/May/ Replacement+CDI+Module+For+Sm all+Petrol+Motors The CDI should work with most small engines that include a highvoltage generator coil in the flywheel. Depending on the arrangement, you may require two CDI units for your 2siliconchip.com.au cylinder engine. With some engines, there is ignition firing on both cylinders at the same time (called a wasted spark) where the plug fires near bottom dead centre of the piston for a 2-stroke or during the exhaust stroke for a 4-stroke, thus having no effect. Headphone switch box I have always admired your magazine, specifically for the audio projects. I have a high-quality headphone amplifier with a single ¼ -inch (6.35/6.5mm) phono socket. I would like to use that single outlet for switching between two pairs of headphones for comparison reasons. I thought I could just buy a switch-box suitable for that but I can’t find one. I’ve checked hifi shops and asked Jaycar Electronics about building one etc. What I would like is a high-quality headphone switch-box ideally configured with one stereo phone input and four stereo phone sockets, with only one of the four outlets active at any one time. I would like two of these . . . continued on page 96 November 2015  95