Re: TI-H: Parallel Link Problem.
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Re: TI-H: Parallel Link Problem.
sorry, the ground was supposed to be over by pin 22.
----------
> From: David Whittaker <tubadave@sonet.net>
> To: ti-hardware@lists.ticalc.org
> Subject: Re: TI-H: Parallel Link Problem.
> Date: Wednesday, August 05, 1998 10:43 PM
>
>
> Did you understand the question? Here would be the new schematic for the
> parallel link.
>
> 1 2 3 4 5 6 7 8 9 10 11 12 13 .............. 22
> | | tip | |
> ground
> | +--------=||==-----------+-------/=\+5 |
> +-----------=||==----------------+----------/=\--+5
> middle
> =||== is diode
> b
> /=\ is transistor
> e c
>
> Will this work for low power laptops, etc.?
>
> ----------
> > 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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