http://search.digikey.com/us/en/products/GLC110-212G/271-2301-ND/1036554.

Not quite a ready solution, but with a couple of shunt regs could do the tr=
ick.

http://search.digikey.com/us/en/products/LM7910CT/LM7910CT-ND/1954736

Interestingly Digikey doesn't have the 7810 in stock.  Maybe Mouser.

DougM

On Mon, Dec 19, 2011 at 8:00 AM, Lindy Mayfield <Lindy.Mayfield@sas.com> wr=
ote:
> Is there some ready solution that I can buy that you know of? =A0I got th=
is for a friend, and is clueless how to create a circuit like this.
>
> I'm also of course googling, but there are many things out there I don't =
understand very well.
>
> Thanks!
> Lindy
>
> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf =
Of IVP
> Sent: Monday, December 19, 2011 8:57 AM
> To: Microcontroller discussion list - Public.
> Subject: Re: [EE] Analogue development board
>
>> where would my friend get 10 volts from?
>
> A couple of MC34063 would provide +/- 10V from a single DC supply
>
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist

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