> Anyway, if the clone has a lower Vdd > it could cause a problem I suppose? I don't think that would be the problem, I tried both USB power and a 5V supply. It has something to do with the way the pickit2 measures the target Vdd, my circuit is a bit different in this part (it is not a 1-to-1 copy). 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