Fullscreen HTML5Med Res (??MB)HTML4

Contents Vol.20, No.4; April 2007 SILICON CHIP www.siliconchip.com.au Features 10 The Proposed Ban On Incandescent Lamps Who flicked the switch to stupid? Banning incandescent lamps and using CFLs instead might seem like a good idea but there are serious ramifications. Here’s a look at the pros and cons – by Leo Simpson 22 Review: SPLat CC16 OEM Controller New credit-card sized controller costs less than $100 and boasts 16 digital input/output (I/O) lines – by Peter Smith Pro jects To Build Those Naughty Incandescent Lamps – Page 10. 26 High-Power Reversible DC Motor Speed Controller Simple design can operate from 12V or 24V batteries at currents up to 40A and can be controlled using a single potentiometer or an RC 1-2ms pulse train – by Leo Simpson & Branko Justic 32 Build A Jacob’s Ladder It sizzles, it sparks, it crackles, it’s fascinating and it’s electrifying. And it’s easy to build – by Leo Simpson 38 GPS-Based Frequency Reference; Pt.2 It’s based on a Garmin GPS receiver module and gives very accurate 1MHz & 10MHz reference frequencies. Here’s how to build and adjust it – by Jim Rowe High-Power Reversible DC Motor Speed Controller – Page 26. 66 Programmable Ignition System For Cars; Pt.2 There are six versions to build; you choose the one suit your car’s ignition pick-up system Here’s how to build the various modules – by John Clarke Build a Jacob’s Ladder – Page 32. 86 Dual PICAXE Infrared Data Communication Want to transmit data using infrared signals? No problem . . . just use two PICAXES – by Stan Swan Special Columns 57 Serviceman’s Log Sorting out customer A/V installations – by the TV Serviceman 62 Circuit Notebook (1) Optical Water Level Switch; (2) 12V SLA Battery Capacity Tester; (3) Rotary Encoder Interface; (4) Simple Circuit For Measuring High-Q Inductors; (5) Stage Microphone Muting Circuit 90 Vintage Radio How to build a super crystal set – by Rodney Champness Departments   2   4 79 80 Publisher’s Letter Mailbag Order Form Product Showcase siliconchip.com.au 96 Ask Silicon Chip 99 Notes & Errata 102 Market Centre Building The Programmable Ignition System – Page 66. April 2007  1