Re: Opto Isolators & Parallel Ports

Tim Goldstein wrote:

>
> From: "Tim Goldstein" <timg@...>
>
> I had a person contact me off the list and asked the following:
>
> >> Do you know where I might find information on how to opto isolate the
> interface between the drivers and the parallel port? Am now using 4n28's
> but these are not working well. <<
>
> Being electronically challenged, I thought I would post tot he list and see
> if anyone can help me to understand how to optically isolate the parallel
> port.
>
> Thanks,
>
> Tim
> [Denver, CO]
>

Tim;

The June issue of Electronics Now has an article on an optical isolator
for the parallel port. It has schematics, circuit board art and parts
lists.

I haven't made one, not sure that I will, Parallel port cards are cheap
and I
haven't burned one up yet.

Bill