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Contents Vol.12, No.7; July 1999 FEATURES 4 Tiny, Tiny Spy Planes Is it a fly or is it really a miniature aircraft? – by Bob Young 10 Sydney’s Superstorm Australia’s most costly natural disaster – by Michael Bath 67 SPECIAL OFFER: Subscribe At 1998 Prices Beat the magazine price rise – and GST – by subscribing now 80 CLIO: PC-Driven Loudspeaker Testing Low-cost system turns your PC into a professional test centre – by Ross Tester Tiny, Tiny Spy Planes – Page 4. PROJECTS TO BUILD 18 Build The Dog Silencer Fed up with the barking dog next door? This could be the answer to your prayers – by Branco Justic 26 A 10µH to 19.99mH Inductance Meter It uses readily available parts and has a 4-digit LCD – by Rick Walters Build A Dog Silencer – Page 18. 36 An Audio-Video Transmitter Use it to monitor a surveillance camera or to transmit your VCR’s signal to another TV set – by John Clarke 60 Programmable Ignition Timing Module For Cars; Pt.2 All the installation and programming details – by Anthony Nixon 72 An X-Y Table With Stepper Motor Control; Pt.3 Building the Z axis – by Rick Walters & Ken Ferguson 84 The Hexapod Robot Microcontroller fun: build a weird six-leg walker – by Ross Tester SPECIAL COLUMNS 42 Serviceman’s Log TV servicing can be frustrating – by the TV Serviceman 68 Vintage Radio A mainland Chinese radio receiver from the 1960s – by Rodney Champness DEPARTMENTS 2 25 53 56 58 Publisher’s Letter Mailbag Product Showcase Electronics Showcase Circuit Notebook 67 91 93 94 96 10µH to 19.99mH Inductance Meter – Page 26. Video Transmitter – Page 36. Subscriptions Form Ask Silicon Chip Notes & Errata Market Centre Advertising Index JULY 1999  1