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Contents
Vol.18, No.2; February 2005
www.siliconchip.com.au
FEATURES
8 Border Surveillance In The 21st Century
New technology is on the hunt for contraband, arms and illegal immigrants
– by Barrie Smith
79 School Electronics: Putting The Picaxe To Work
All the fun at the Picaxe fair and first prize to East Hills Girls Technology High
School for an ingenious Picaxe-based pedestrian crossing – by Ross Tester
88 Satellite C-Band TV: Death By Overload, Pt.2
Some practical ideas to minimise (or even eliminate) interference to C-band
satellite signals from wireless broadband signals – by Garry Cratt
100 Build Yourself A Windmill Generator, Pt.3
USB-Controlled
Electrocardiograph – Page 14.
Third article shows you how to build the platform and install the stator, drive
shaft and front bearing fitting – by Glenn Littleford
PROJECTS TO BUILD
14 Build A USB-Controlled Electrocardiograph
It’s controlled by a USB port on your PC or laptop and displays a person’s
electrocardiogram (ECG) on the monitor or LCD screen – by Jim Rowe
32 TwinTen Stereo Amplifier
Build this gutsy little amplifier for your Discman, MP3 player or games
machine – by Jim Rowe & Peter Smith
TwinTen Stereo Amplifier – Page 32.
64 Inductance & Q-Factor Meter
Compact unit measures inductors from 200nH - 10mH, checks Q-factor from
1-120 and displays the results on an LCD – by Leonid Lerner
72 A Real Yagi Antenna For UHF CB
Are you good at scrounging? All it takes is some plastic conduit and a couple
of wire coat hangers to build this really effective antenna – by Stan Swan
Inductance &
Q-Factor Meter
– Page 64.
SPECIAL COLUMNS
44 Circuit Notebook
(1) Laser-Guided Parking Aid; (2) Novel White LED Torch; (3) Electronic
Thermostat For Plug-In Heaters; (4) ESR & Low Resistance Test Meter
48 Serviceman’s Log
Life at the end of the food chain – by the TV Serviceman
90 Salvage It!
Low-Cost Yagi Antenna
For UHF CB – Page 72.
Build a $2 battery charger – by Julian Edgar
92 Vintage Radio
Converting a 240VAC set to 32V DC operation – by Rodney Champness
DEPARTMENTS
2
4
43
61
Publisher’s Letter
Mailbag
Order Form
Product Showcase
siliconchip.com.au
105
108
109
111
Ask Silicon Chip
Notes & Errata
Market Centre
Ad Index
February 2005 1
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