Werner,

        Have you tried adding a nice large capacitor in parallel with
your switch.  Might help reduce the effects of the bounce a little.

Fred Thompson
fthompso@mail.win.org


On Mon, 13 Jan 1997, Werner Terreblanche wrote:

> Werner Terreblanche wrote:
> >
> > My battery powered 16C71 application is experiencing startup
> > problems.  Every tenth or so time when I switch on power to the
> > circuit, it just wouldn't start up.
>
> Werner:
>
> > Are you switching the battery with a switch? If you are, you need to
> > deal with the enormous trash that accompanies the switch closure; many
> > inexpensive switches bounce around for a long time. A power supply
> > with the AC line switched doesn't usually exhibit poor behavior until
> > powerdown, if at all (depends on the supply). This can be a problem if
> > you expect to preserve information while powered down. Dallas has done
> > a good job of dealing with this, and you can check their stuff for a
> > good start at what needs to be done in this case.
>
> Tom
>
> Yes I am switching the battery with a switch.  I really hoped that
> there would have been some sort of software solution, because I've
> already got a bunch of PCB's made.
>
> I experimented with it over the weekend, and it seems that switching the
> Brownout detect and the Power up timer does reduce the effect quite
> dramatically compared to leaving them switched off.  However, I'm not
> sure if it completely solves the problem.
>
> Thank you for your advice
>
> Werner
> --
> Werner Terreblanche     http://www.aztec.co.za/users/werner
> wterreb@plessey.co.za (work)  OR  werner@aztec.co.za  (home)
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