Circuit Cellar November 2010


E-Book Content

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. ($8.50 Canada) www.circuitcellar.com A Look at Exemplary Design Projects from the U. S., Japan, France, & Beyond C2_Layout 1 8/11/2010 11:02 AM Page 1 Low-cost Industrial Serial to Ethernet Solutions t*OTUBOUMZOFUXPSLFOBCMFBOZTFSJBMEFWJDF t/PQSPHSBNNJOHJTSFRVJSFEGPSTFSJBMUP&UIFSOFUBQQMJDBUJPO t$VTUPNJ[FUPTVJUBOZBQQMJDBUJPOXJUIBEFWFMPQNFOULJU SBL2e Chip SBL2e 200 SBL2e 100 QPSUTFSJBMUP&UIFSOFUTFSWFS XJUIFJHIU"%DPOWFSUFSJOQVUT BOEPQUJPOBM41* *$ $"/ QFSJQIFSBMEFWJDFTVQQPSU QPSUTFSJBMUP&UIFSOFUTFSWFS XJUIGPVS"%DPOWFSUFSJOQVUT  PQUJPOBM*$QFSJQIFSBMTVQQPSU BOEQJOIFBEFS QPSUTFSJBMUP&UIFSOFUTFSWFS XJUIGPVS"%DPOWFSUFSJOQVUT  PQUJPOBM*$QFSJQIFSBMTVQQPSU BOE3+DPOOFDUPS SBL2e X Hardware Features 6QUPUISFFTFSJBMQPSUT .CQT&UIFSOFU VQUPEJHJUBM*0  CJU"%DPOWFSUFST PQFSBUJOHUFNQFSBUVSFUP$ CJUQFSGPSNBODF &YUFSOBMQPSU TFSJBMUP&UIFSOFUTFSWFS XJUI34TVQQPSU Software Features 5$16%15FMOFU)551NPEFT %)$14UBUJD*1TVQQPSU XFCCBTFEPS "5DPNNBOEDPOöHVSBUJPO Low Prices 4#-F$IJQ   2UZL %FWJDF1/4#-F$)*1*3 4#-F   2UZ %FWJDF1/4#-F*3 4#-F   2UZ,%FWJDF1/4#-F*3 4#-F9  2UZ %FWJDF1/4#-F9*3 4#-F9" 9 2UZ %FWJDF1/4#-F9"*3 SBL2e XA &YUFSOBMTFSWFSXJUIVQUP GPVS"%DPOWFSUFSJOQVUT  VQUPFJHIUEJHJUBM*0BOEVQ UPtwo6"354 (one RS-232) Need a custom solution? /FU#VSOFS4FSJBMUP&UIFSOFU%FWFMPQNFOU,JUTBSFBWBJMBCMFUPDVTUPNJ[FBOZ BTQFDUPGPQFSBUJPOJODMVEJOHXFCQBHFT EBUBöMUFSJOH PSDVTUPNOFUXPSL BQQMJDBUJPOT"MMLJUTJODMVEFQMBUGPSNIBSEXBSF "/4*$$ DPNQJMFS 5$1*1 TUBDL XFCTFSWFS FNBJMQSPUPDPMT 3504 BOE/#&DMJQTF*%& Information and Sales]TBMFT!OFUCVSOFSDPN Web]XXXOFUCVSOFSDPNTelephone] 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
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