Hi, in messing around I came up with a *really simple*
2-tran boost circuit that gives 13.3v regulated
output from a regulated 5v input.

It supplies up to 12mA @ 13.3v, but only starts up
reliably when output load is about 10k (about 1mA)
during startup. Only 2x NPN tran, 1N4148 and cheap
rf choke, 4 resistors, 2 caps, 13v zener.

It can be turned on/off at will by attaching one
tran base to a PIC output.

I think Myke was after something like this for a
cheap PIC programmer etc? If this spec is acceptable
i'll write it up or does it need more current etc??
-Roman

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.