> What would be the simplest way to get 10v ?

If you're starting with 12V or more, probably an LM317 / LM350 and
a couple of resistors to set the voltage

Page 2

http://www.ti.com/lit/ds/symlink/lm117.pdf

Similarly

http://www.onsemi.com/pub_link/Collateral/LM350-D.PDF

Or, a jacked-up 7805 / 7808 / 7809

http://www.talkingelectronics.com/pay/BEC-3/Page59.html

Or, the MC34063 has quite a good buck-boost topology to convert
any input 5 - 40V to 10V

Example, page 18. Which does by chance show 10V o/p, which is
alterable with the R1 and R2 ratio

http://www.intusoft.com/onsemipdfs/an920-d.pdf

I have a little unit based on that, using a ZTX750 for the PNP, although
the d/s part or TIP32 works too

Joe
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.