Fullscreen HTML5Med Res (??MB)HTML4

Contents Vol.20, No.7; July 2007 SILICON CHIP www.siliconchip.com.au Features 10 How To Cut Your Greenhouse Emissions; Pt.1 Cutting electricity use curbs greenhouse gas emissions and saves you money. Here’s what’s worthwhile doing and what’s not – by Peter Seligman 15 New Superbright LED: Will It Replace 50W Halogens? Halogen downlights are big energy wasters. A new superbright LED spotlight from Osram could mean their days are numbered 16 Review: Watchguard Pro Video Security System Catch thieves in the act with this all-in-one video monitoring solution – by Ross Tester How To Cut Your Greenhouse Gas Emissions & Save Money– Page 10. 39 Making Panels For Projects It’s easy to buy parts but how do you go about making good looking panels for your projects? Here are a few pointers – by Peter Smith Pro jects To Build 24 Build A 6-Digit Nixie Clock, Pt.1 Here’s a fantastic “retro” project to build. It mixes the warm fascinating glow of six Nixie tubes with some cool blue LED uplighting – by David Whitby 32 Tank Water Level Indicator Want to quickly check the water level in your rainwater tank? This simple circuit will do the job – design by Allan March 40 PICAXE Plays Music Use a PICAXE to play music by interfacing it to the new VMUSIC2 module. We show circuits for the PICAXE-14M & the PICAXE-28X1 – by Clive Seager Build A 6-Digit Nixie Clock – Page 24. 58 A PID Temperature Controller PID stands for “proportional integral differential”. This unit uses PID for accurate temperature control without overshoot – by Leonid Lerner 69 20W Class-A Amplifier Module; Pt.3 This month we describe the Speaker Protection & Muting Module and show you how to build it – by Peter Smith & Greg Swain Special Columns 44 Serviceman’s Log I just hate doing repair quotations – by the TV Serviceman Tank Water Level Indicator – Page 32. 80 Circuit Notebook (1) PICAXE-Based Tank Pump Controller; (2) Halogen Lamp Optical Pyrometer; (3) Timer For MIG Welder; (4) Simple DC Motor Speed Control; (5) Make Your Own SMD Tools; (6) Leap-Frogging LED Chaser 88 Vintage Radio The Weston Model 660 Radio Set Analyser – by Rodney Champness Departments   2   3 31 57 Publisher’s Letter Mailbag Book Review Order Form siliconchip.com.au 86 Product Showcase 96 Ask Silicon Chip 102 Market Centre Speaker Protection & Muting Module For Class-A Amplifier – Page 69. July 2007  1