On Wed, 6 May 1998, Steven Kosmerchock wrote:

> Thank you to everybody who made suggestions!!! I appreciate the time you took
to answer my question.
>
> www.geocities.com/researchtriangle/lab/6584
>                                         Thanks once again,
>                         Steve Kosmerchock
>
> email:   steve.kosmerchock@celwave.com
>
>
> ---- PICLIST(a)MITVMA.MIT.EDU's Message ----
>
> You can use the MAX206 which is offered from Maxim which is an 24 pin
> SSOP which is very small and only about $2.00.
>
> > > I know this has been mentioned before, I looked at the archive and I don't
> > have lots of free time on my hands. All I need to know is what will it take
> > to communicate to a PIC with a PC. I just need to transmit signals to the
> > PIC via PC. I DON'T need the PIC to talk to the PC. Do I need a rs-232 ic
> > or what?? I'm new to this and am not sure what it will take. Any advise and
> > suggestions would be apprecited!!!!
> >
> >
> > You can get there with just connecting the pic directly to the PC. If you
> > do, the logic 1 in the pic output is a zero to the PC.
> > I've written bit-banger full duplex com for the '84. In my case, we used a
> > buffer transistor, but it wasn't strictly needed.
> > If you want a little protection on the port pins, a 470 ohm resistor would
> > be a good idea.
> > Any solution that only sends +5 and ground is violating the spec, but the
> > 1489 receivers (maybe the most popular 232 Rx chip
> > on the planet) only sense + and ground.  The '88 transmitter sends +/-V as
> > per spec.
> >
> > A maxim chip will get you there, but it's large, and expensive.

if it's for personal use you can get free samples there..


> >
> > The soft uart routines have been done to death, so I imagine you've got that
> > code already.
> >
> >
> Todd Brisebois
> Engineering
> Fitel-Photomatrix
> tbrisebois@fpmx.com   (613)228-9695  ext.229
>


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