Re: TI-H: Parallel Link Problem.
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Re: TI-H: Parallel Link Problem.
I just checked the power from pins 12 and 13 to groound with a led. It was
only about half as bright on pin 13, and 12 didn't even light it. Any
suggestions?
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> From: David Whittaker <tubadave@sonet.net>
> To: ti-hardware@lists.ticalc.org
> Subject: Re: TI-H: Parallel Link Problem.
> Date: Wednesday, August 05, 1998 9:56 PM
>
>
> I have my Parallel link included with my expander. Pins 14-21 function
as
> the module port. it includes a 5v power supply. If I were to use some
> transistors on pins 12 and 13, would that pull the power up high enough?
> Also, would it fail the link tester program if it was only a problem with
> power? Or is my only problem that it is too fast? Yes, I've check all
the
> connections, and nothing is touching.
>
> ----------
> > From: David Knaack <dknaack@hotmail.com>
> > To: ti-hardware@lists.ticalc.org
> > Subject: Re: TI-H: Parallel Link Problem.
> > Date: Wednesday, August 05, 1998 10:50 AM
> >
> >
> > >I have a problem with my link. I ran the test program, and it
> > returned:
> > <snip>
> >
> > Make sure your components are all in right and the connections
> > are good. I had similar results with the parallel link, problem
> > was a loose connection. After I got that fixed it worked fine.
> >
> > If everything looks right, maybe you could use a multimeter
> > to measure the current output from each pin to ground. Anyone
> > know what is required?
> > (This will require setting the pins high, might have to
> > write a program to do that, I don't know what the idle state is.
> > If the link program is active it may set them high ( to keep the
> > calculator from slowing down)).
> >
> > DK
> >
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