Re: TI-H: Parallel Port Q's

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: Parallel Port Q's
From: Grant Stockly <gussie@alaska.net>
Date: Mon, 25 Jan 1999 15:54:09 -0900
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: ti-hardware@lists.ticalc.org
In-Reply-To: <167c7212.36ac8a35@aol.com>
Reply-To: ti-hardware@lists.ticalc.org


Some PEE SEAs these days are built with parallel ports that can't drive a
led with all pins combined...

I've seen a plan for a DAC with a transistor on every pin since the
computer couldn't drive the thing.  :/


>In a message dated 1/24/99 8:16:45 PM Pacific Standard Time,
>cyanide_hd@yahoo.com writes:
>
>> Does it really matter if you get a different diode for the parallel
>>  port graphlink? Do I really need a resistor?
>>  ==
>>  __    __
>>  \ \  / /
>>   \ \/ /
>>    \__/isit my Website on TI-85 at: http://www.geocities.com/Augusta/9822/
>> tifiles/ticalc.html
>>  Updated at least once a week.
>>  "A Calculator for every Home" --Quoted by me!!!
>I would presume that the diode listed in the schematics is pretty imporant,
>and you can find it at radio shack, before the resistor was added to the
>design i've made 2 parallel links for the 83 and they worked fine on 2
>different computers, some people reported not being able to get their links to
>work right on some computers
>-JJS

References:

Re: TI-H: Parallel Port Q's

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