Re: Parallel Port Woes

Hi Caudlet,

Yes, I understand that! I just happened to spy these "cable extenders"
at a local surplus store, AND they have there own "wall wart" modules.
In fact, I'm wondering if I can steal some +5 from them to run the
Gecko's. The delays should be minimal, as you recount.

Alan KM6VV


caudlet wrote:

>
> --- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> > Hi Caudlet,
> >
> > Nice posting! I've commented in the past on this. I found
> a "buffer
> > box" for the parallel port. Gives some isolation, and better signal
> > levels. PROBABLY also adds (as would yours) a little DELAY to the
> > pulses. As long as they don't get too narrow!
> >
> >
>
> At the time I finally discovered the cause of my problems, (late
> Saturday evevning)I could not have found a ready made parallel port
> buffer and I was DETERMINED to get that unit working! Given a choice
> between buying and building a little buffer amp, I would have
> normally picked the buy option. My time off is more valuable to me
> than my working hours and I want to spend it doing things that I
> enjoy..like making chips. As for delay it would be in the
> nanoseconds range and the wave shape (on/off times) tracks the input
> signal. The waveform improved a lot by taking the load off the
> parallel port. Everything was nice and square with sharp rise and
> fall times.
>
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