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MARKET CENTRE Cash in your surplus gear. Advertise it here in SILICON CHIP FOR SALE can order almost anything in! LEDsales, 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 Pub­ lications can supply PCBs and programmed microcontrollers for all recent projects. Order online or phone (02) 9939 3295. Audio + Video: Professional quality Quest AV brand equipment is made and sold in Australia exclusively by Quest Electronics. Ph 0431 920 667. sales<at>questronix.com.au NIXIE CLOCK KITS KIT ASSEMBLY & REPAIR DIRECT FROM CHINA: Kinsten PCB, high-speed drill press, hookup wire. A$ prices www.kinsten.co; USD prices http://www.aliexpress.com/ store/130218 Low prices include postage. SILICON CHIP July-Aug 2007 Full kits & spare tubes still available (For a limited time only) Phone 0403 055 374; Email glesstron<at>msn.com RF REPAIRS - Australia wide repair service of most two way radio equipment. Please contact us on (02) 4305 2301 or service<at>rfrepairs.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 VINTAGE RADIO REPAIRS: electrical mechanical fitter with 36 years experience 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 bigalradioshack<at> gmail.com Superbright LEDs of all sizes, shapes and colours, brand names like Cree and Avago as well as low cost generic LEDs for non-critical applications. Also stocking kits, components and other assorted items. If we don’t have it, just ask, we KEITH RIPPON KIT ASSEMBLY & REPAIR: * Australia & New Zealand; * Small production runs. Phone Keith 0409 662 794. keith.rippon<at>gmail.com SERVICES CONSULTING AND ENGINEERING SERVICES Pty Ltd specialises in the design and manufacture of electronic based products. We do volume manufacturing and reverse engineering. Contact 0247323310 or email nbsethna<at>gmail.com to discuss your requirements 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. me about loading and kW vs kVA etc, the el cheapo runs air-conditioning that the Honda could never do without hesitation. It will run all the power tools I have without fault. So what’s in the circuitry that freaks out with an inverter welder attached? Is there a way around it? (P. L., via email). •  It could be due to the instantaneous surge current into the large input capacitor in the inverter welder. siliconchip.com.au One possible way to stop that would be to use our SoftStarter for Power Tools, published in the the July 2012 issue. You can see a 1-page preview of the article at www. siliconchip.com.au/Issue/2012/July/ Soft+Starter+For+Power+Tools If you are interested, you can purchase the issue and buy the PCB on the website: www.siliconchip.com. au/Shop/8/665 Question on PICkit3 programmer I am hoping you may be able to help with a problem I have just encountered with the Micromite/GPS clock project from the May 2014 magazine. After using my PICkit3 for a number of years with Windows XP, I have just upgraded my desktop computer to Windows continued next page July 2014  103 Advertising Index Altronics.................................. 78-81 Australian Exhibitions & Events...... 5 Emona Instruments........................ 4 Front Panel Express..................... 39 Gless Audio................................ 103 Hare & Forbes.......................... OBC Icom Australia.............................. 59 Jaycar .............................. IFC,49-56 KCS Trade Pty Ltd.......................... 9 Ask SILICON CHIP . . . continued from page 103 7 Ultimate 64-bit and my laptop to Windows 7 Pro 32-bit. I find that my PICkit3 no longer works with these operating systems. Have you heard of this problem or know of a solution? I cannot program my Maximite chip which is frustrating. I do have a PICkit2 which will work with the Windows 7 programs but the PIC32MX150F128B-50I/SP is not a supported chip. I have emailed Microchip directly but received no reply after a couple of weeks and I have searched the internet and forums but cannot seem to find a solution. I have also tried running MPLAB IDE and the standalone PIC­ kit3 programmer under the Windows XP emulation mode of Windows 7 to no avail. (P. C., via email). •  In our experience, the PICkit3 does work with Windows 7 Ultimate 64 bit. Our suggestion is to uninstall MPLAB X (if you have it installed), then install the latest version from the Microchip website. Make sure that you follow the instructions regarding the installation of drivers, then open up MPLAB IPE. It is an independent programmer Notes & Errata 100W Hybrid Switchmode/Linear Bench Supply, Pt.3, June 2014: the statement “with the pot fully anti-clockwise, there should be minimum resistance between the left-most and centre pins on CON5 & CON6” is for the pins as viewed from the front of the unit (ie, opposite to the orientation of the PCB overlay diagram). 104  Silicon Chip DOWNLOAD OUR CATALOG at Keith Rippon .............................. 103 www.iinet.net.au/~worcom Kinsten Pty Lrd........................... 103 WORLDWIDE ELECTRONIC COMPONENTS PO Box 631, Hillarys, WA 6923 Ph: (08) 9307 7305  Fax: (08) 9307 7309 Email: worcom<at>iinet.net.au KitStop.......................................... 39 installed with MPLAB X and it knows how to use the PICkit3 to program the PIC32MX150. LD Electronics............................ 103 LEDsales.................................... 103 Master Instruments.................... 103 Microchip Technology..................... 7 Mikroelektronika......................... IBC Capacitor discharge ignition for a go-kart Ocean Controls............................ 25 We race go-karts with Yamaha 100J engines. As with most 2-strokes, they are fitted with a magneto-style ignition. This is fitted with what Yamaha call a ‘Charge Coil’ and a ‘Pulser Coil’, where the output cables go to an ignition box with the plug wire coming out. This is where the problem starts – Yamaha give a test reading for the HT circuit of 10Ω. I have four boxes, two of which read OK while the other two read 3.8Ω and give a weak spark. As these boxes are sealed with a type of resin, you are unable to see inside. The boxes are now unavailable so I would like to know if they could be repaired once inside or could a new set-up be made and put inside the box. I realise that this is a long shot. Yes, secondhand ones do come on the market but it is a gamble as to their condition. (L. C., Wilton, NSW). •  We published a replacement CDI Module for Motorbikes/Small Petrol Motors in May 2008. This required a charge coil and trigger/pulser coil as in your Yamaha engine. You would need to add an ignition coil to the circuit as the CDI module does not have that but is designed to Quest Electronics....................... 103 QualiEco Circuits Pty Ltd............. 45 Radio & Hobbies DVD.................. 69 RFrepairs................................... 103 RF Modules................................ 104 Rohde & Schwarz.......................... 3 Sesame Electronics................... 103 Silicon Chip Binders................ 35,97 Silicon Chip Online Shop........ 90-91 Silicon Chip Subscriptions........... 47 Silvertone Electronics.................. 13 Wiltronics...................................... 11 Worldwide Elect. Components... 104 connect to one. Almost any standard 12V ignition coil should be suitable although those for motorcycles tend to be smaller than automotive types. You can view a preview of the article at www.siliconchip.com.au/ Issue/2008/May/Replacement+CDI+ Module+For+Small+Petrol+Motors You can purchase the full issue and the PCB at www.siliconchip.com.au/ SC Shop/ siliconchip.com.au