actually, BC557 is not a big concern in the programmer. it's just act like a switch with active low input. and BC557 is quite universal PNP transistor. so any other universal PNP transistor can do the same. compare the datasheet with others especially on the dc current gain(dc Beta). chow ----- Original Message ----- From: Gilles Auger To: Sent: Friday, April 06, 2001 9:46 AM Subject: [PIC]:P16PRO programmer > Hi > > I'm building a P16Pro serial PIC programmer designed by Dojan > Dobaj. I have all the parts minus the not easy to find BC557, > use for switching the programming voltages > Do you know an easy to find subtitute for the BC557 that can do the job. > > Thanks for your collaboration. > > Gilles Auger > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body