IR (I think) makes a photovoltaic bias supply, you may need several to
get to -15V.
Has anyone mentioned a simple voltage doubler?

--
Looking forward:
Alan Shinn


Experience the
beginnings of microscopy.
Make your own replica
of one of Antony van Leeuwenhoek's microscopes.
visit    http://www.mindspring.com/~alshinn/

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body