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<br /> April 2013<br /> Volume 119<br /> Issue 1924<br /> £5.10<br /> THE ESSENTIAL ELECTRONICS ENGINEERING MAGAZINE<br /> www.electronicsworld.co.uk<br /> The Centenary Issue<br /> Past<br /> Arthur C. Clarke for<br /> Wireless World<br /> Future<br /> All for one, one for all –<br /> the future smartphone<br /> We are 100 years old!<br /> <br /> OLOGY<br /> n pages 8-9<br /> 05 FROM THE EDITOR 50<br /> 100 Years in Print<br /> 06 TECHNOLOGY: THEN AND NOW<br /> 10 ELECTRONICS WORLD SURVEY<br /> introduced by Svetlana Josifovska 54<br /> 14 FROM THE ARCHIVES:<br /> `Extra-Terrestrial Relays' by Arthur C. Clarke<br /> introduced by Svetlana Josifovska<br /> 20 FROM THE ARCHIVES: 60<br /> `Current Dumping Audio Amplifier' article by P. J. Wa<a title="EW April13 zmag page 1" href="http://viewer.zmags.co.uk/publication/3796f068?page=1"> April 2013 Volume 119 Issue 1924 £5.10 </a> <a title="EW April13 zmag page 2" href="http://viewer.zmags.co.uk/publication/3796f068?page=2"> </a> <a title="EW April13 zmag page 3" href="http://viewer.zmags.co.uk/publication/3796f068?page=3"> OLOGY </a> <a title="EW April13 zmag page 4" href="http://viewer.zmags.co.uk/publication/3796f068?page=4"> </a> <a title="EW April13 zmag page 5" href="http://viewer.zmags.co.uk/publication/3796f068?page=5"> FROM THE EDITOR 05 ONE HUNDRED BIRTHDAY C</a> <a title="EW April13 zmag page 6" href="http://viewer.zmags.co.uk/publication/3796f068?page=6"> 06 CENTENARY ISSUE: THEN AND NOW The Birth </a> <a title="EW April13 zmag page 7" href="http://viewer.zmags.co.uk/publication/3796f068?page=7"> www.xjtag.com XJ</a> <a title="EW April13 zmag page 8" href="http://viewer.zmags.co.uk/publication/3796f068?page=8"> 08 SPONSORED FEATURE WIRELESS SENSOR NETWORK </a> <a title="EW April13 zmag page 9" href="http://viewer.zmags.co.uk/publication/3796f068?page=9"> SPONSORED FEATURE 09 occurs when multiple cop</a> <a title="EW April13 zmag page 10" href="http://viewer.zmags.co.uk/publication/3796f068?page=10"> 10 CENTENARY ISSUE: SURVEY THE NEXT 100</a> <a title="EW April13 zmag page 11" href="http://viewer.zmags.co.uk/publication/3796f068?page=11"> CENTENARY ISSUE: SURVEY 11 </a> <a title="EW April13 zmag page 12" href="http://viewer.zmags.co.uk/publication/3796f068?page=12"> 12 CENTENARY ISSUE: LETTERS HAPPY BIRTHDAY</a> <a title="EW April13 zmag page 13" href="http://viewer.zmags.co.uk/publication/3796f068?page=13"> CENTENARY ISSUE: LETTERS 13 Congratulatio</a> <a title="EW April13 zmag page 14" href="http://viewer.zmags.co.uk/publication/3796f068?page=14"> 14 FROM THE ARCHIVES Extra-Terrestrial Re</a> <a title="EW April13 zmag page 15" href="http://viewer.zmags.co.uk/publication/3796f068?page=15"> </a> <a title="EW April13 zmag page 16" href="http://viewer.zmags.co.uk/publication/3796f068?page=16"> 16 FROM THE ARCHIVES </a> <a title="EW April13 zmag page 17" href="http://viewer.zmags.co.uk/publication/3796f068?page=17"> FROM THE ARCHIVES 17 306 earth's equator,</a> <a title="EW April13 zmag page 18" href="http://viewer.zmags.co.uk/publication/3796f068?page=18"> 18 FROM THE ARCHIVES </a> <a title="EW April13 zmag page 19" href="http://viewer.zmags.co.uk/publication/3796f068?page=19"> FROM THE ARCHIVES 19 </a> <a title="EW April13 zmag page 20" href="http://viewer.zmags.co.uk/publication/3796f068?page=20"> 20 FROM THE ARCHIVES Current Dumping Audio</a> <a title="EW April13 zmag page 21" href="http://viewer.zmags.co.uk/publication/3796f068?page=21"> FROM THE ARCHIVES 21 </a> <a title="EW April13 zmag page 22" href="http://viewer.zmags.co.uk/publication/3796f068?page=22"> 22 FROM THE ARCHIVES </a> <a title="EW April13 zmag page 23" href="http://viewer.zmags.co.uk/publication/3796f068?page=23"> FROM THE ARCHIVES 23 </a> <a title="EW April13 zmag page 24" href="http://viewer.zmags.co.uk/publication/3796f068?page=24"> 24 FROM THE ARCHIVES </a> <a title="EW April13 zmag page 25" href="http://viewer.zmags.co.uk/publication/3796f068?page=25"> </a> <a title="EW April13 zmag page 26" href="http://viewer.zmags.co.uk/publication/3796f068?page=26"> 26 CENTENARY ISSUE: Q&A A CENTURY OF ANALO</a> <a title="EW April13 zmag page 27" href="http://viewer.zmags.co.uk/publication/3796f068?page=27"> CENTENARY ISSUE: Q&A 27 What remain your b</a> <a title="EW April13 zmag page 28" href="http://viewer.zmags.co.uk/publication/3796f068?page=28"> 28 CENTENARY ISSUE: T&M ACCELERATING PRODU</a> <a title="EW April13 zmag page 29" href="http://viewer.zmags.co.uk/publication/3796f068?page=29"> CENTENARY ISSUE: T&M 29 We paten</a> <a title="EW April13 zmag page 30" href="http://viewer.zmags.co.uk/publication/3796f068?page=30"> 30 CENTENARY ISSUE: T&M NI</a> <a title="EW April13 zmag page 31" href="http://viewer.zmags.co.uk/publication/3796f068?page=31"> ADVERTORIAL 31 HANDLING INPUT AND OUTPUT ASYM</a> <a title="EW April13 zmag page 32" href="http://viewer.zmags.co.uk/publication/3796f068?page=32"> 32 CENTENARY ISSUE: SCOPES OSCILLOSCOPES E</a> <a title="EW April13 zmag page 33" href="http://viewer.zmags.co.uk/publication/3796f068?page=33"> CENTENARY ISSUE: SCOPES 33 saved, ma</a> <a title="EW April13 zmag page 34" href="http://viewer.zmags.co.uk/publication/3796f068?page=34"> 34 CENTENARY ISSUE: SCOPES </a> <a title="EW April13 zmag page 35" href="http://viewer.zmags.co.uk/publication/3796f068?page=35"> ADVERTORIAL 35 HARTING T he HARTING Technolo</a> <a title="EW April13 zmag page 36" href="http://viewer.zmags.co.uk/publication/3796f068?page=36"> 36 CENTENARY ISSUE: CARS HOW IC SOLUTIONS</a> <a title="EW April13 zmag page 37" href="http://viewer.zmags.co.uk/publication/3796f068?page=37"> CENTENARY ISSUE: CARS 37 </a> <a title="EW April13 zmag page 38" href="http://viewer.zmags.co.uk/publication/3796f068?page=38"> 38 CENTENARY ISSUE ENGINEERING THE WORL</a> <a title="EW April13 zmag page 39" href="http://viewer.zmags.co.uk/publication/3796f068?page=39"> CENTENARY ISSUE 39 can </a> <a title="EW April13 zmag page 40" href="http://viewer.zmags.co.uk/publication/3796f068?page=40"> 40 CENTENARY ISSUE manufacturing pro</a> <a title="EW April13 zmag page 41" href="http://viewer.zmags.co.uk/publication/3796f068?page=41"> ADVERTORIAL 41 MOUSER LEADS WITH “BLUE CHIP” </a> <a title="EW April13 zmag page 42" href="http://viewer.zmags.co.uk/publication/3796f068?page=42"> 42 CENTENARY ISSUE: 20 YEARS AGO LIVING I</a> <a title="EW April13 zmag page 43" href="http://viewer.zmags.co.uk/publication/3796f068?page=43"> CENTENARY ISSUE: 20 YEARS AGO 43 phe</a> <a title="EW April13 zmag page 44" href="http://viewer.zmags.co.uk/publication/3796f068?page=44"> 44 ADVERTORIAL MAXIM INTEGRATED: CHANGIN</a> <a title="EW April13 zmag page 45" href="http://viewer.zmags.co.uk/publication/3796f068?page=45"> </a> <a title="EW April13 zmag page 46" href="http://viewer.zmags.co.uk/publication/3796f068?page=46"> 46 CENTENARY ISSUE FROM GROWING YOUR OWN OR</a> <a title="EW April13 zmag page 47" href="http://viewer.zmags.co.uk/publication/3796f068?page=47"> CENTENARY ISSUE 47 </a> <a title="EW April13 zmag page 48" href="http://viewer.zmags.co.uk/publication/3796f068?page=48"> 48 CENTENARY ISSUE F</a> <a title="EW April13 zmag page 49" href="http://viewer.zmags.co.uk/publication/3796f068?page=49"> </a> <a title="EW April13 zmag page 50" href="http://viewer.zmags.co.uk/publication/3796f068?page=50"> 50 CENTENARY ISSUE SMART CITIES OF TOMORR</a> <a title="EW April13 zmag page 51" href="http://viewer.zmags.co.uk/publication/3796f068?page=51"> CENTENARY ISSUE 51 population grows b</a> <a title="EW April13 zmag page 52" href="http://viewer.zmags.co.uk/publication/3796f068?page=52"> 52 CENTENARY ISSUE QUAKE AND GAS MONITORING</a> <a title="EW April13 zmag page 53" href="http://viewer.zmags.co.uk/publication/3796f068?page=53"> </a> <a title="EW April13 zmag page 54" href="http://viewer.zmags.co.uk/publication/3796f068?page=54"> 54 CENTENARY ISSUE: CARS VEHICLES OF THE F</a> <a title="EW April13 zmag page 55" href="http://viewer.zmags.co.uk/publication/3796f068?page=55"> CENTENARY ISSUE: CARS 55 The future </a> <a title="EW April13 zmag page 56" href="http://viewer.zmags.co.uk/publication/3796f068?page=56"> 56 CENTENARY ISSUE: CARS The future</a> <a title="EW April13 zmag page 57" href="http://viewer.zmags.co.uk/publication/3796f068?page=57"> </a> <a title="EW April13 zmag page 58" href="http://viewer.zmags.co.uk/publication/3796f068?page=58"> 58 ADVERTORIAL FMCONNECT – PLEASE CONNECT ...</a> <a title="EW April13 zmag page 59" href="http://viewer.zmags.co.uk/publication/3796f068?page=59"> ADVERTORIAL 59 to Figure structur</a> <a title="EW April13 zmag page 60" href="http://viewer.zmags.co.uk/publication/3796f068?page=60"> 60 CENTENARY ISSUE: CAN CAN IN AUTOMOTIVE </a> <a title="EW April13 zmag page 61" href="http://viewer.zmags.co.uk/publication/3796f068?page=61"> CENTENARY ISSUE: CAN 61 bandwid</a> <a title="EW April13 zmag page 62" href="http://viewer.zmags.co.uk/publication/3796f068?page=62"> 62 CENTENARY ISSUE: CAN </a> <a title="EW April13 zmag page 63" href="http://viewer.zmags.co.uk/publication/3796f068?page=63"> CENTENARY ISSUE: CAN 63 difference in</a> <a title="EW April13 zmag page 64" href="http://viewer.zmags.co.uk/publication/3796f068?page=64"> 64 CENTENARY ISSUE: CONNECTORS CONNECTORS </a> <a title="EW April13 zmag page 65" href="http://viewer.zmags.co.uk/publication/3796f068?page=65"> CENTENARY ISSUE: CONNECTORS 65 One Co</a> <a title="EW April13 zmag page 66" href="http://viewer.zmags.co.uk/publication/3796f068?page=66"> 66 CENTENARY ISSUE CIRCUIT PROTECTION INNO</a> <a title="EW April13 zmag page 67" href="http://viewer.zmags.co.uk/publication/3796f068?page=67"> CENTENARY ISSUE 67 Figure 1: Circuit protec</a> <a title="EW April13 zmag page 68" href="http://viewer.zmags.co.uk/publication/3796f068?page=68"> 68 CENTENARY ISSUE: AUDIO “</a> <a title="EW April13 zmag page 69" href="http://viewer.zmags.co.uk/publication/3796f068?page=69"> CENTENARY ISSUE: AUDIO 69 says. “You </a> <a title="EW April13 zmag page 70" href="http://viewer.zmags.co.uk/publication/3796f068?page=70"> 70 CENTENARY ISSUE: AUDIO going to listen</a> <a title="EW April13 zmag page 71" href="http://viewer.zmags.co.uk/publication/3796f068?page=71"> </a> <a title="EW April13 zmag page 72" href="http://viewer.zmags.co.uk/publication/3796f068?page=72"> 72 CENTENARY ISSUE: THEORY THE END OF THE</a> <a title="EW April13 zmag page 73" href="http://viewer.zmags.co.uk/publication/3796f068?page=73"> CENTENARY ISSUE: THEORY 73 Figu</a> <a title="EW April13 zmag page 74" href="http://viewer.zmags.co.uk/publication/3796f068?page=74"> 74 CENTENARY ISSUE: THEORY </a> <a title="EW April13 zmag page 75" href="http://viewer.zmags.co.uk/publication/3796f068?page=75"> ADVERTORIAL 75 ABOUT BULGIN BOX OUT SUB HEA</a> <a title="EW April13 zmag page 76" href="http://viewer.zmags.co.uk/publication/3796f068?page=76"> 76 CENTENARY ISSUE THE CHALLENGES OF USIN</a> <a title="EW April13 zmag page 77" href="http://viewer.zmags.co.uk/publication/3796f068?page=77"> CENTENARY ISSUE 77 </a> <a title="EW April13 zmag page 78" href="http://viewer.zmags.co.uk/publication/3796f068?page=78"> 78 CENTENARY ISSUE Nancy McMillan,</a> <a title="EW April13 zmag page 79" href="http://viewer.zmags.co.uk/publication/3796f068?page=79"> </a> <a title="EW April13 zmag page 80" href="http://viewer.zmags.co.uk/publication/3796f068?page=80"> </a> <a title="EW April13 zmag page 81" href="http://viewer.zmags.co.uk/publication/3796f068?page=81"> CENTENARY ISSUE: PRODUCT OF THE MONTH 81 Beld</a> <a title="EW April13 zmag page 82" href="http://viewer.zmags.co.uk/publication/3796f068?page=82"> 82 ELECTRONICS WORLD CENTENARY SHOWCASE CAMBR</a> <a title="EW April13 zmag page 83" href="http://viewer.zmags.co.uk/publication/3796f068?page=83"> CENTENARY ISSUE: PRODUCTS 83 Current-Sensing </a> <a title="EW April13 zmag page 84" href="http://viewer.zmags.co.uk/publication/3796f068?page=84"> 84 CENTENARY ISSUE: PRODUCTS HAMEG INSTRUMEN</a> <a title="EW April13 zmag page 85" href="http://viewer.zmags.co.uk/publication/3796f068?page=85"> CENTENARY ISSUE: PRODUCTS 85 ITT's Interconn</a> <a title="EW April13 zmag page 86" href="http://viewer.zmags.co.uk/publication/3796f068?page=86"> 86 CENTENARY ISSUE: CLASSIFIED Designing Ana</a> <a title="EW April13 zmag page 87" href="http://viewer.zmags.co.uk/publication/3796f068?page=87"> </a> <a title="EW April13 zmag page 88" href="http://viewer.zmags.co.uk/publication/3796f068?page=88"> </a>