In message <000001c36dff$47ddc470$0b00a8c0@PAARD> Wouter van Ooijen wrote: > The Vcc to the PIC is supplied via an OpAmp. Would this be sufficient to > program EPROM PICs, as the programmer claims to support? I doubt it. I'd use a modified "voltage follower" with a BC548 or a BFY51 on the output, collector connected to the feedback line (i.e. -IN). +IN to the DAC, transistor collector to Vcc. Theoretically the opamp should be enough to keep the o/p voltage stable. Later. -- Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB, philpem@dsl.pipex.com | ViewFinder, Ethernet (Acorn AEH62), http://www.philpem.dsl.pipex.com/ | 8xCD, framegrabber, Teletext Do not adjust your mind - it's a reality malfunction. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.