> Has anybody been able to program these devices using > WinXP software and a homemade circuit for High Voltage > programming ? Yes of course, various people have build home made versions of my Wisp628. Likewise home-build clone designs of Mircohip's ICD1 and ICD2 exist. But these are all intelligent proggers, that use the serial port for communication. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: www.voti.nl/hvu -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist