Subscriptions: Elektor Electronics (Publishing), Regus Brentford, 1000 Great West Road, Brentford TW8 9HH, England. Tel. (+44) (0) 208 261 4509, fax: (+44) (0) 208 261 4447 Internet: www.elektor-electronics.co.uk Email: subscriptions@elektor-electronics.co.uk Rates and terms are given on the Subscription Order Form Volume 32, Number 358, October 2006 ISSN 0268/4519 Elektor Electronics aims at inspiring people to master electronics at any personal level by presenting construction projects and spotting developments in electronics and information technology. Publishers: Elektor Electronics (Publishing), Regus Brentford, 1000 Great West Road, Brentford TW8 9HH, England. Tel. (+44) (0) 208 261 4509, fax: (+44) (0) 208 261 4447 www.elektor-electronics.co.uk. The magazine is available from newsagents, bookshops and electronics retail outlets, or on subscription. Elektor Electronics is published 11 times a year with a double issue for July & August. Under the name Elektor and Elektuur, the magazine is also published in French, German and Dutch. Together with franchised editions the magazine is on circulation in more than 50 countries. International Editor: Mat Heffels (m.heffels@segment.nl) Editor: Jan Buiting (editor@elektor-electronics.co.uk) International editorial staff: Harry Baggen, Thijs Beckers, Ernst Krempelsauer, Jens Nickel, Guy Raedersdorf. Design staff: Ton Giesberts, Paul Goossens, Luc Lemmens, Karel Walraven Editorial secretariat: Hedwig Hennekens (secretariaat@segment.nl) Graphic design / DTP: Ton Gulikers, Giel Dols Managing Director / Publisher: Paul Snakkers Marketing: Carlo van Nistelrooy Customer Services: Margriet Debeij (m.debeij@segment.nl) Head Office: Segment b.v. P.O. Box 75 NL-6190-AB Beek The Netherlands Telephone: (+31) 46 4389444, Fax: (+31) 46 4370161 Distribution: Seymour, 2 East Poultry Street, London EC1A, England Telephone:+44 (0)207 429 4073 UK Advertising: Huson International Media, Cambridge House, Gogmore Lane, Chertsey, Surrey KT16 9AP, England. Telephone: +44 (0)1932 564999, Fax: +44 (0)1932 564998 Email: r.elgar@husonmedia.com Internet: www.husonmedia.com Advertising rates and terms available on request. International Advertising: Klaas Caldenhoven, address as Head Office Email: advertenties@elektuur.nl Advertising rates and terms available on request. Copyright Notice The circuits described in this magazine are for domestic use only. All drawings, photographs, printed circuit board layouts, programmed integrated circuits, disks, CD-ROMs, software carriers and article texts published in our books and magazines (other than third-party advertisements) are copyright Segment. b.v. and may not be reproduced or transmitted in any form or by any means, including photocopying, scanning an recording, in whole or in part without prior written permission from the Publishers. Such written permission must also be obtained before any part of this publication is stored in a retrieval system of any nature. Patent protection may exist in respect of circuits, devices, components etc. described in this magazine. The Publisher does not accept responsibility for failing to identify such patent(s) or other protection. The submission of designs or articles implies permission to the Publishers to alter the text and design, and to use the contents in other Segment publications and activities. The Publishers cannot guarantee to return any material submitted to them. Disclaimer Prices and descriptions of publication-related items subject to change. Errors and omissions excluded. © Segment b.v. 2006 Printed in the Netherlands 6 elektor electronics - 10/2006