----------
> From: Anil K. Patel <anil.patel@AUTODESK.COM>
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [OT] Doubling 12 volts...maybe use a 8-pin PIC!
> Date: Thursday, May 28, 1998 8:09 PM
>
> I'm not an expert on this topic, but I've done similar voltage
> doubling with a ICL7660 to double 5v to 10v, but with much
> lower current (< 50ma).  Maybe the spec sheet for the 7660
> would give you a starting point to think about as long as
> it lists theory.
>
> --Anil
>
> > -----Original Message-----
> > From: pic microcontroller discussion list
> > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of NCS Products
> > Sent: Thursday, May 28, 1998 6:05 PM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: [OT] Doubling 12 volts...maybe use a 8-pin PIC!
> >
> >
> > I need to double a 12VDC input to get 24VDC at .5 - 1A.
> >
> > This can be done, I'm sure, but how?
> > I think the basic concept is, you charge two capacitors in parallel,
> > then discharge in series.
> >
> > What type of switches (MOSFETS?) do I need, and how many.
> > Any pointers to analog info would be much appreciated.
> >
Have you condsidered using a Maxim chipin a boost configuration.  Check out
Maxim for their power supply components.