Does everybody receive my message in two copies ?
If so, can someone tell me why is this.
I am using Netscape Communicator 4.73

Regards,
Gaston.


Gaston Gagnon wrote:
>
> Thanks for you well formulated question Dan that brought the right answer.
> I have been looking for the H-Bridge of this type of servo for a very long time :))
>
> Trough Alexandre's link I have found that both circuits BAL6686 and BA6688 are available from
> http://www.angelfire.com/biz/techsonic/page2.html.
> The BAL6686 is also available from Futaba for 3.75USD
>
> Thank you guys,
> Gaston.
>
> Dan Michaels wrote:
> >
> > Rich Ottosen wrote:
> > >Dan:
> > >The Signetics data books I have show the NE544 the schematic for its
> > >use. There is also application note AN133 that gives more detail on how
> > >to use the chip. Very informative.
> > >
> > >If you can't find the data elsewhere then I can scan it for you.
> > >
> >
> > Many thanks to Mike and Dale and Rich for your responses.
> >
> > Alexandre's link provided the schematic for the exact servo I have,
> > Futaba S3003. It uses one BAL6686 h-bridge and one BA6688 servo control
> > chip. I assume the 6686 has clamp diodes built-in, but I'll have to see
> > if I can find the specs. Other than that, it looks like the only
> > built-in noise suppressor is a cap across the motor - value unknown.
> >
> > I guess I don't need an NE544 datasheet, but it would be interesting
> > to know what sort of noise filters might be present in the servos
> > that use that chip.
> >
> > I think Drew might also use some help in designing a good filter for
> > his servo problem on the other thread.
> >
> > thanks,
> > - dan michaels
> > www.oricomtech.com
> > =========================
> >
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