Hi Martin -
--- In "naturalwatt" <> wrote:
>
> --- In "Fred" <frice@> wrote:
> Thanks to everyone, not just Fred, who has made really helpful
suggestions.
>
> Because I am using the TS7250 enclosure, I don't want to make extra
circuitry at the
> TS7250 end. So I'm going to use a serial port, and a MAX232 at the
display end to shift
> RS232 levels back to TTL.
>
> Martin
> >
> > --- In "naturalwatt" <martin@> wrote:
> >
> > > What's the best way of extending the distance to
> > > about 10 or 20 metres? I can think of loads of
> > > ways of doing it, but I'm interested to see if
> > > anybody can suggest a cheap and simple way.
> >
> > Use an RS232 line driver, something inexpensive like a MAX line
> > driver. The DIO outputs can be tied to the RS232 line driver's
inputs,
> > conveyed a long distance as RS232 12 to 15 volts to another RS232
line
> > driver's input. The output from that can go to your display. And
the
> > RS232 line driver's handle high clock rates, much higher than you're
> > using, I'm sure, so that shouldn't be a problem.
> >
>
How will you drive the TS-7250 RS-232 port using your 64bit shift
register and DIO? You'll need some more intelligence at the display
end if you want use RS-232 on the wire, rather than just using the MAX
chips as line drivers, right?
Maybe I'm missing something though.
regards, ...... Charlie
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