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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