Might be an interesting read for some: http://www.eedesign.com/features/exclusive/showArticle.jhtml?articleId=18312 202 Regards, Ken Pergola P.S. Some URL stitching may be needed if it gets word-wrapped... -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads