Broken/Fried Parallel port...
- From: lmcgill2@xxxxxxxx
- Date: 27 Jun 2006 08:27:40 -0700
Hello all, I have been working with an interfacing project lately and I
think I have "screwed up" my parallel port. When trying to read data
from the data register (set from an A/D converter) I wasn't getting
correct results. After some "experimenting" I realized one of the pins
isn't going "high" when being supplied voltage. Anyway, it seems if I
connect this pin directly to the +5 from the 7805 regulator it goes
high, but the A/D converter IC doesn't seem to se the pin high. I use a
multimeter and figured that this pin needs at leats 18mA to go high
while all the others need about 2 (maybe less). SO, my question is, is
this normal? Do specific pins on a parallel port act that differently
from eachother or have I fried something inside my laptop? Nonetheless,
my port still works, I just altered its functionality. So how could I
use my A/D converter to throw this malfunctioning parallel port pin
high? Could I use a transistor (2N3904?!?) somehow? Any help would be
excellent. THanks, Lucas.
.
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