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Contents Vol.24, No.5; May 2011 SILICON CHIP www.siliconchip.com.au Features 16 Selling Surplus Tech Stuff On eBay Have you got a horde of stuff that’s taking up too much space in your home? Here’s how to get rid of it by selling it on eBay – by Barrie Smith 42 Jaycar Is 30 Years Old They’ve come a long way and now have 78 stores and over 1000 employees spread around the world – by Leo Simpson 62 Memory Card Compatibility Issues Quite a few SILICON CHIP projects use memory cards for storing data, loading software and the like. But there can sometimes be issues – by Nicholas Vinen 64 USB Data Logger Firmware Improvements Revised software reduces start-up power consumption and squashes a few bugs – by Nicholas Vinen Selling Your Surplus Tech Stuff On eBay – Page 16. Pro jects To Build 26 The SportSync Audio Delay Module Easy-to-build 0.2-34s audio delay circuit lets you synchronise radio sports commentary with the action broadcast on TV. A universal remote control is used to adjust the delay – by Nicholas Vinen 66 The Maximite Computer, Pt.3 Final article describes the BASIC language running on the Maximite micro­ computer and shows you how to use this tiny marvel for measurement and control – by Geoff Graham 78 12V 100W Converter With Adjustable 15-35V DC Output Efficient switchmode design runs from 12V and will power laptops and other devices which require a DC voltage between 15V & 35V – by John Clarke The SportSync Audio Delay Module – Page 26. 86 Phone Line Polarity Checker Do you suspect your ADSL speed is slower than it should be? It could be as simple as incorrect polarity in your phone wall socket! – by David Drane Special Columns 44 Serviceman’s Log The Christchurch earthquake – by the Serviceman 57 Circuit Notebook How To Use The Maximite Computer – Page 66. 66. (1) Electric Guitar/Violin Preamplifier; (2) PICAXE-based Automatic MultiCore Cable Tester; (3) Data Logger Based On An OpenLog µSD Board; (4) Flexitimer Modification Gives Adjustable On And Off-Delay Settings 94 Vintage Radio How NOT to build vintage radio gear – by Rodney Champness Departments   2   6 40 85 Publisher’s Letter Mailbag Product Showcase Order Form siliconchip.com.au 90 99 102 103 Book Review Ask Silicon Chip Notes & Errata Market Centre 12V 100W DC-DC Converter With Adjustable 15-35V Output – Page 78. May 2011  1