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Contents Vol.18, No.3; March 2005 www.siliconchip.com.au FEATURES    8 The Revolution In Car Instruments Find out what’s in store for future dashboards – by Julian Edgar 32 The Start Of Colour TV In Australia, Pt.1 Colour TV is now 30 years old in Australia. Here’s a nostalgic look at the way things were back in 1975 – by Keith Walters 83 Build Yourself A Windmill Generator, Pt.4 Fourth and final article looks at propeller and mast options and describes further refinements for the alternator – by Glenn Littleford Professional Sports Scoreboard – Page 14. PROJECTS TO BUILD 14 Build A Professional Sports Scoreboard, Pt.1 It features big, bright LED displays and is controlled by an easy-to-operate wireless console. Modular construction makes it easy to build – by Jim Rowe 38 A Lap Counter For Swimming Pools Do you swim laps to keep in shape? This simple Picaxe-powered counter will keep track of the number of laps you’ve done – by Rick Walters 64 Inductance & Q-Factor Meter; Pt.2 Second article has all the construction details – by Leonid Lerner Lap Counter For Swimming Pools – Page 38. 74 Shielded Loop Antenna For AM Radios Dramatically improve your AM reception with this tuned loop antenna. It’s just the shot for remote areas & for minimising interference – by David Whitby 80 A Cheap UV EPROM Eraser An “anti-bacterial” toothbrush holder, a single capacitor and a simple IC carrier are all you need for a fully-functioning EPROM eraser – by Barry Hubble 92 Sending Picaxe Data Over 477MHz UHF CB Interested in sending digital data over UHF CB? That’s just one more thing you can do with a Picaxe – by Stan Swan SPECIAL COLUMNS 48 Serviceman’s Log Just knock but do it quietly – by the TV Serviceman 70 Circuit Notebook (1) Headlight Reminder; (2) El Cheapo Cable Tester; (3) Aviation Intercom; (4) Touch Lamp Remote Pad; (5) Simple Under-Voltage Cutout; (6) Reverse Polarity Protector; (7) Picaxe-Based Freezer Thermostat Shielded Loop Antenna For AM Radios – Page 74. 88 Salvage It! A $10 lathe & drill press tachometer – by Julian Edgar 96 Vintage Radio The Astor AJS: an economy universal car radio – by Rodney Champness DEPARTMENTS   2   4 13 46 61 Publisher’s Letter Mailbag Order Form Book Review Product Showcase siliconchip.com.au 102 105 108 111 Ask Silicon Chip Notes & Errata Market Centre Ad Index $10 Lathe/Drill Press Tachometer – Page 88. March 2005  1