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Cover - 244-out_Layout 1 10/13/2010 11:35 AM Page 1 Build an Aircraft Data Logging System, p. 26 | Portable Power: A DIY Power Adapter, p. 58 | Thermal Energy Production, p. 66 THE MAGAZINE FOR COMPUTER A P P L I C AT I O N S November 2010 Issue 244 A PVDF Phased-Array Analog Front End Sound Generation with Three Basic Chips Solve Connectivity Issues Between Embedded Apps Digital Audio Spectrum Analyzer Professional Grounding Rules PLUS DesignStellaris 2010 $7.50 U.S. ($8.50 Canada) www.circuitcellar.com A Look at Exemplary Design Projects from the U. S., Japan, France, & Beyond C2_Layout 1 8/11/2010 11:02 AM Page 1 Low-cost Industrial Serial to Ethernet Solutions t *OTUBOUMZ OFUXPSL FOBCMF BOZ TFSJBM EFWJDF t /P QSPHSBNNJOH JT SFRVJSFE GPS TFSJBM UP &UIFSOFU BQQMJDBUJPO t $VTUPNJ[F UP TVJU BOZ BQQMJDBUJPO XJUI B EFWFMPQNFOU LJU SBL2e Chip SBL2e 200 SBL2e 100 QPSU TFSJBM UP &UIFSOFU TFSWFS XJUI FJHIU " % DPOWFSUFS JOQVUT BOE PQUJPOBM 41* * $ $"/ QFSJQIFSBM EFWJDF TVQQPSU QPSU TFSJBM UP &UIFSOFU TFSWFS XJUI GPVS " % DPOWFSUFS JOQVUT PQUJPOBM * $ QFSJQIFSBM TVQQPSU BOE QJO IFBEFS QPSU TFSJBM UP &UIFSOFU TFSWFS XJUI GPVS " % DPOWFSUFS JOQVUT PQUJPOBM * $ QFSJQIFSBM TVQQPSU BOE 3+ DPOOFDUPS SBL2e X Hardware Features 6Q UP UISFF TFSJBM QPSUT .CQT &UIFSOFU VQ UP EJHJUBM * 0 CJU " % DPOWFSUFST PQFSBUJOH UFNQFSBUVSF UP $ CJU QFSGPSNBODF &YUFSOBM QPSU TFSJBM UP &UIFSOFU TFSWFS XJUI 34 TVQQPSU Software Features 5$1 6%1 5FMOFU )551 NPEFT %)$1 4UBUJD *1 TVQQPSU XFC CBTFE PS "5 DPNNBOE DPOöHVSBUJPO Low Prices 4#- F $IJQ 2UZ L %FWJDF 1 / 4#- F$)*1 *3 4#- F 2UZ %FWJDF 1 / 4#- F *3 4#- F 2UZ , %FWJDF 1 / 4#- F *3 4#- F 9 2UZ %FWJDF 1 / 4#- F9 *3 4#- F 9" 9 2UZ %FWJDF 1 / 4#- F9" *3 SBL2e XA &YUFSOBM TFSWFS XJUI VQ UP GPVS " % DPOWFSUFS JOQVUT VQ UP FJHIU EJHJUBM * 0 BOE VQ UP two 6"354 (one RS-232) Need a custom solution? /FU#VSOFS 4FSJBM UP &UIFSOFU %FWFMPQNFOU ,JUT BSF BWBJMBCMF UP DVTUPNJ[F BOZ BTQFDU PG PQFSBUJPO JODMVEJOH XFC QBHFT EBUB öMUFSJOH PS DVTUPN OFUXPSL BQQMJDBUJPOT "MM LJUT JODMVEF QMBUGPSN IBSEXBSF "/4* $ $ DPNQJMFS 5$1 *1 TUBDL XFC TFSWFS F NBJM QSPUPDPMT 3504 BOE /# &DMJQTF *%& Information and Sales ] TBMFT!OFUCVSOFS DPN Web ] XXX OFUCVSOFS DPN Telephone ] 9.qxp 8/7/2008 11:04 AM Page 1 2_Layout 1 5/12/2010 7:18 AM Page 1 2_Layout 1 5/12/2010 7:18 AM Page 2 Task_Masthead_244_masthead.qxd 10/18/2010 12:53 PM Page 4 T ASK MANAGER Radical Empirical Testing November 2010 – Issue 244 A 4 reader recently told me his fascination with electronics began in childhood when he was shocked while playing with an electrical socket. Now that’s one way to convince yourself that electricity exists! Nihil in intellectu nisi prius in sensu,[1] right? Obviously, the reader lived to tell the story, become a professional engineer, and subscribe to Circuit Cellar. What’s truly interesting is that he wasn’t the first engineer to tell me that he first “discovered” electricity through his senses—that is, when it coursed through his body. I’ve heard a few similar stories during my years here at Circuit Cellar. Several readers literally jolted themselves into the field of electronics while sticking all sorts of objects (e.g., paper clips and forks) into sockets or messing with older re