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Contents Vol.17, No.2; February 2004 www.siliconchip.com.au FEATURES 8 Hands-On PC Board Design For Beginners; Pt.1 A practical guide to downloading, installing and configuring the free Autotrax PC board design software – by Peter Smith 36 Twenty-Five Years Of Automotive ABS Anti-Lock Braking Systems have now been around for 25 years and have saved many lives. Here’s a brief look at their development – by Julian Edgar 76 Breaking The Gigapixel Barrier It’s claimed to be the biggest digital photo ever but it’s not done by simply pointing and clicking a camera – by Max Lyons Supply Rail Monitor For PCs – Page 12. PROJECTS TO BUILD 12 Simple Supply Rail Monitor For PCs It clips into your PC and has three LED bargraphs to indicate the health of the PC’s supply rails – by Jim Rowe 22 Studio 350 Power Amplifier Module; Pt.2 The construction details for this new high-power audio amplifier plus the circuit and wiring details for a matching power supply – by Leo Simpson & Peter Smith 32 Using The Valve Preamp In A Hifi System Here’s how to add a volume control and modify the November 2003 Valve Audio Preamplifier for use with line level signals – by Jim Rowe 56 Our Fantastic Human-Powered LED Torches Sure you’ve seen LED torches before but not like these. There are no batteries; you just crank the handle to generate light – by Julian Edgar 63 Shorted Turns Tester For Line Output Transformers No TV or monitor technician should be without this unit. Build it and you’ll wonder how you ever got along without it – by Bob Parker 73 PICAXE-18X 4-Channel Datalogger; Pt.2 Building The Studio 350 Power Amplifier Module – Page 22. Fantastic HumanPowered LED Torches – Page 56. Adding a real-time clock (RTC) to the datalogger and putting it to use – by Clive Seager SPECIAL COLUMNS 40 Serviceman’s Log A tale of four Philips TVs – by the TV Serviceman 70 Circuit Notebook (1) Cable Tester Uses A Quad Latch; (2) Phantom Supply For Lapel Microphone Adaptor; (3) Frequency Multiplier For LF Measurements; (4) LED Chaser Provides Three Game Functions 80 Vintage Radio The HMV 660 console of 1940 – by Rodney Champness DEPARTMENTS 2 4 31 53 55 Publisher’s Letter Mailbag Book Review Product Showcase Silicon Chip Weblink www.siliconchip.com.au 88 91 92 93 Shorted Turns Tester For Line Output Transformers – Page 63. Ask Silicon Chip Notes & Errata Order Form Market Centre/Ad Index February 2004  1