>
> At 22:52 5/01/99 EST, you wrote:
> >Hi all, 2 questions here.
> >1. I'm building a P16Pro serial PIC programmer designed by Dojan Dobaj. I
> have
> >all but 1 part avalible to me, which are the PNP BC557 transistors used for
> >switching the programming voltages. Is using this exact transistor
> critical to
> >the operation? Or can I use say a MPS2907 which can be bought at Radio Shack?

> You can use the 2907 but if memory serves correctly, you will need to
> rotate them
> 180 degrees as the emmiter and collector are transposed as compared to the
> BC547.
> This is assuming that the MPS2907 are the same pinout as the PN2907 parts.
> (I got caught on this myself)
> Note that this is from memory so please just be aware of the possibility
> and check
> it out before soldering.
> Jim