Alt-BEAM Archive
Message #13406
To: beam@sgiblab.sgi.com
From: Ben Hitchcock beh01@uow.edu.au
Date: Thu, 13 Apr 2000 20:49:38 -0400
Subject: Re: 'Nother photovore question
> Try shorting the FLED briefly with a piece of wire.
>
> Then try shorting the base of the PNP transistor (BRIEFLY!) to ground.
> Let us know if this makes it work.
>
> Ben
> ----------
> >From: "William Cox"
> >To:
> >Subject: Re: 'Nother photovore question
> >Date: Sun, 9 Apr 2000 6:23
> >
>
> > I have the EXACT same problem with the FRED circuit!! It's *very*
> > aggravating...
> > -William
> >
> >
> > ----- Original Message -----
> > From: Berkowitz
> > To:
> > Sent: Saturday, April 08, 2000 1:44 PM
> > Subject: Re: 'Nother photovore question
> >
> >
> >> I did a little debugging of my own when i got some unexpected free time
> > and
> >> traced the problem to the trim pot. (Wasn't centered).
> >>
> >> Now, what I've read seems to say that both motors won't pop at the same
> >> time, but will occillate. My new problem is I can't get mine to do
that.
> >> One motor /always/ turns, and the other never does. I've tried
adjusting
> >> the pot more, moving the light source around, and even covering one of
the
> >> photodiodes but the problem has persisted.
> >>
> >>
> >> -Zac
> >>
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