[oopic] Re: oSerialH on ooPIC-R, TTL-Level or true RS232?

--- In oopic@yahoogroups.com, "design.wonk" <design.wonk@...> wrote:
>

The inverter is inside the PC.

> Just curious... How is the oooPIC-R able to communicate with my PC
> using a serial cable with no inverter?
>
>
>
> --- In oopic@yahoogroups.com, "rtstofer" <rstofer@> wrote:
> >
> >
> > > If the remote end is also 0-5V, then I would not need the
inverter -
> > > is that correct?
> > >
> >
> > Right! The DB-9 output is inverted and the remote end would need
to
> > re-invert the signals.
> >
> > HOWEVER, a regular level shifter MAY accept the 0-5V signals (it
> > usually will) and provide the inversion. Besides, it mistake-
proofs
> > the system. So just use the level shifter at the remote end just
as
> > though you were connecting to a PC.
> >
> > REMEMBER, you will need a NULL MODEM cable. Pin 2 on the first
end
> > connects to pin 3 on the second. Same for pin 3 on one first end
> > connecting to pin 2 on the second. Pin 5 common on both ends.
Both
> > connectors to be DB-9 MALE.
> >
> > Richard
> >
>

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