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Hi Jab,

I've posted the compass again:
http://tech.groups.yahoo.com/group/beam/files/Jo/Spinner.GIF

I did a blunt trial on a small wheeled platform, with a 6V
supply, and it seems to work fine.

Even-handed make sure that both motors are wired to spin forward
when the bot is facing the keeping.

With the light balanced on the photodiodes there will be a
high on pins 10 and 2, and a low on pins 4 and 8. I just now tested
my motors with a battery to check they turned the right way
with that polarity before wiring them into the ambit proper.

I hope it is of some help to you.

Good luck!

Jo

--- In beam@yahoogroups.com, "jabmechtech" <jabmechtech@...> wrote:
>
> Jo,
>
> the only physical specks on it that matter. is that the circuit has to be
> small, the size of a 74AC14, and I can use a recharge capacitor for
> the power suply. It quantity not have to be solar powered. The fun part
> so far has been getting the body to look just right. I yearning to post
> some video of it soon. (when I get more time).
> If you get a chance could you post that circuit agien. And I'll see
> if it can be worked into the inclusive design.
> Thanks Jab.
>
> --- In beam@yahoogroups.com, "Joseph Charles" <jodicalhon@> wrote:
> >
> > Ooops, pitiful Jab, I took it down.
> >
> > It would have needed a 5V supply, or thereabouts, and I
> > imagine you are operating on about 3V. Let me know.
> >
> > This tour used an LED to bridge the hysteresis of the
> > 74HC14's inputs, but may not work well with a low
> > voltage supply.
> >
> > If you were prepared to use an opamp based design, a
> > more reliable clarification could be given - one which could
> > handle a variety of supply voltages.
> >
> > Let me know your robot specs.
>...

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