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Contents Vol.21, No.12; December 2008 www.siliconchip.com.au SILICON CHIP Features 12 The Chevrolet Volt Electric Car The star of this year’s Sydney Motor Show, the Chevrolet Volt is a true electric vehicle. Here’s a look at the technology behind the vehicle – by Ross Tester 18 Digital Cinema: Digitising The Movies There’s a revolution in the movie industry, with the industry slowly moving away from film to digital. There are advantages for production, distribution and even copyright protection – by Barrie Smith 68 Review: Owon Digital Hand-Held Oscilloscope We look at Owon’s affordable dual-channel digital oscilloscope that can also double as a digital multimeter. Its portability makes it ideal for field work – by Mauro Grassi Chevrolet Volt Electric Car – Page 12. 78 The 2008 AEVA Electric Vehicle Field Day An interesting display of DIY electric vehicle conversions – by Leo Simpson Pro jects To Build 28 Versatile Car Scrolling Display, Pt.1 Use it to monitor, display and log up to six sensors on a scrolling or static LED display. You program it via the USB port & it can also control two relay outputs in response to measured signals – by Mauro Grassi 36 Test The Salt Content Of Your Swimming Pool Don’t shell out big bucks for a salt-water tester for your pool. Our low-tech solution is easy to set up and costs almost nothing – by Leo Simpson Versatile Car Scrolling Display & Data Logger – Page 28. 60 Build A Brownout Protector Low mains voltages (brownouts) are a fatal hazard to induction motors. This Brownout Protector is rated at 2300W and is easy to build – by John Clarke 72 Simple Voltage Switch For Car Sensors Use it to monitor a car sensor and turn things on and off . . . boost solenoids, fans, water injection, intercooler sprays, etc – design by John Clarke Special Columns 40 Serviceman’s Log Intermittents: No Money For Old Rope – by the TV Serviceman 53 Circuit Notebook (1) Fuzz Box For Guitars; (2) Monitor For Pet Bed Heater; (3) One-Button Camera Timer; (4) VHF Aircraft Receiver With Squelch; (5) Toy Poker Machine Is No Risk To Wallet; (6) Battery Monitor Has Low Current Drain Build A Brownout Protector – Page 60. 82 Vintage Radio The Leak TL/12 Plus Valve Amplifier – by Rodney Champness Departments 2   4 17 39 Publisher’s Letter Mailbag Book Review Product Showcase siliconchip.com.au 77 87 90 94 Order Form Ask Silicon Chip Notes & Errata Market Centre Simple Voltage Switch For Car Sensors – Page 72. December December 2008  1