----- Original Message -----
From: w. v. ooijen / f. hanneman <wf@XS4ALL.NL>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Monday, June 26, 2000 11:42 AM
Subject: Re: [OT]: RS232 level (sort of) without 232 chip


> > Hi All,
> > I have seen somewhere a circuit for how to connect standard
> > 5v output ports to RS232 serial port of a PC using a couple
> > of diodes... but  can't find it again.
> >
> > Anyone point me in the right direction please?
>
> http://www.xs4all.nl/~/wouter/pic/wisp
> http://www.xs4all.nl/~/wouter/pic/wloader
>
> Note: such circuits are non-inverting, so they can NOT be used with for
> instance the f877 hardware uart!
>

Right!    You'll need at least a transistor inverter to use the hardware
UART.

Bob Ammerman
RAm Systems

> (I'm sure there are plenty other such circuits)
> Wouter