but the 232 operates in the 5v range, what if I put 3
232's one on each computer and use the AND gate. this
should keep the traffic @ 5v level correct ?



--- Jinx <joecolquitt@CLEAR.NET.NZ> wrote:
> > I want to be able to select, this is where the PIC
> > comes in. I want the PIC to listen and if it sees
> a
> > special key sequence it will turn off one of the
> tx/rx
> > AND gates and turn on the other tx/rx AND gates.
> > Allowing communication to the other computer.
>
> A possible problem is the signal voltage. If your
> PCs
> are using +/- 12V levels (ie not 5V) then you won't
> be
> able to pass the comms through a standard gate. If
> you can get a +/- power supply from the MAX chips
> it's
> possible you could use 4066's or 4052's to select
> and
> route the signals
>
> --
> http://www.piclist.com hint: The PICList is archived
> three different
> ways.  See http://www.piclist.com/#archives for
> details.
>
>


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