Download EPE 2001-09 - Parent Directory
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ISSN 0262 3617 PROJECTS . . . THEORY . . . NEWS . . . COMMENTS . . . POPULAR FEATURES . . . VOL. 30. No. 9 SEPTEMBER 2001 Cover illustration by Jonathan Robertson www.epemag.wimborne.co.uk EPE Online: www.epemag.com Projects and Circuits WATER MONITOR by John Becker How costly is it to keep your garden watered? Find out and control it 616 INGENUITY UNLIMITED hosted by Alan Winstanley Wien Bridge Audio Generator; Precision Stereo Volume Control 626 L.E.D. SUPER TORCHES by Andy Flind Two hi-tech (one super-hi-tech!) designs to brighten your nights 628 PERPETUAL PROJECTS – 3 by Thomas Scarborough 644 Three more solar-powered projects – Loop Burglar Alarm, Touch-Switch Door-Light, Solar-Powered Rain Alarm – plus seven suggestions for variants SYNCHRONOUS CLOCK DRIVER by Andy Flind By popular request – a dual-frequency, 50Hz-60Hz converter for mains operated synchronous clocks 660 Series and Features NEW TECHNOLOGY UPDATE by Ian Poole Small is efficient when it comes to packaging CONTROLLING FLIGHT by Owen Bishop An insight into how electronics helps to maintain aircraft safety PRACTICALLY SPEAKING by Robert Penfold A novice’s guide to why some pins can be left unconnected NET WORK – THE INTERNET PAGE surfed by Alan Winstanley CIRCUIT SURGERY by Alan Winstanley and Ian Bell Curious Decoupling; Some Like it Hot 622 638 654 658 666 Regulars and Services WE HAVE MOVED! Please note our new address and phone/fax numbers – see page 615 © Wimborne Publishing Ltd 2001. Copyright in all drawings, photographs and articles published in EVERYDAY PRACTICAL ELECTRONICS is fully protected, and reproduction or imitations in whole or in part are expressly forbidden. Our October 2001 issue will be published on Thursday, 13 September 2001. See page 607 for details Everyday Practical Electronics, September 2001 EDITORIAL NEWS – Barry Fox highlights technology’s leading edge Plus everyday news from the world of electronics READOUT John Becker addresses general points arising ELECTRONICS VIDEOS Our range of educational videos SHOPTALK with David Barrington The essential guide to component buying for EPE projects PLEASE TAKE NOTE Shortwave Loop Aerial BACK ISSUES Did you miss these? Some now on CD-ROM! CD-ROMS FOR ELECTRONICS Electronic Projects; Filters; Digital Works 3.0; Electronic Circuits and Components V2.0; Digital Electronics; Analogue Electronics; PICtutor; Modular Circuit Design; Electronic Components Photos; C for PIC Micros; CAD Pack ELECTRONICS MANUALS Essential reference works for hobbyists, students and service engineers DIRECT BOOK SERVICE A wide range of technical books available by mail order PRINTED CIRCUIT BOARD AND SOFTWARE SERVICE PCBs for EPE projects. Plus EPE software ADVERTISERS INDEX 615 623 635 642 650 650 652 656 668 670 673 676 Readers Services ) Editorial and Advertisement Departments 615 605