Re: TI-H: Parallel Link Problem.

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Re: TI-H: Parallel Link Problem.


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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