Hi,

or use the RS5C313 and a CR2032 battery. The former is made by Ricoh. Look
at www.ricoh.co.jp/LSI/english

There is a sample schematic, too.

I hope this helps.

Imre


On Thu, 5 Aug 1999, Gabriel Gonzalez wrote:

> Just use a DS1302 and a coin-cell battery.
>
> Gabriel
>
> -----Original Message-----
> From: Hickman, Aaron <HickmanAB@MAIL.VMI.EDU>
> To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
> Date: Thursday, August 05, 1999 11:12 AM
> Subject: battery backup for RTC needed
>
>
> >To All,
> >
> >        I am looking for a simple battery backup solution for a project
> >involving an RTC.  I would like to keep the clock running should power,
> normally
> >derived from an AC to DC converter, be interrupted.  I have no experience
> in
> >battery charging/backup designs.  Could someone point me in the right
> direction,
> >preferably towards a design available on the internet?
> >
> >Sincerely,
> >
> >Aaron Hickman
>
>