From: "PCS Electronics"
References: <email@example.com> <1xgR9.2310$tQ1.firstname.lastname@example.org> <email@example.com>
Subject: Re: RS232 newbie - in need of assistance!
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Fri, 3 Jan 2003 17:21:34 +0100
NNTP-Posting-Date: Fri, 03 Jan 2003 17:21:31 MET
Organization: Slovenija OnLine - SiOL
I'd connect the switches via 1K resistors, just to be sure nothing "burns".
Now you can start working on software :-)
Marko - PCS Electronics
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"Matt Foster" wrote in message
> I took it out as requested!
> "PCS Electronics" wrote in
> message news:HAiR9.2322$tQ1.firstname.lastname@example.org...
> > > AFAIK, the OP still wants to stay with the serial port because he
> > > wants the challenge and, ostensibly, because that's one of the
> > > instructor's requirements.
> > >
> > > Reading a [bidirectional] parallel port is a no-brainer, while
> > > formatting data and sending it to the RX DATA input of an RS-232
> > > port is a little more challenging, especially doing it in hardware.
> > >
> > > I don't think the price of the solution matters much (it's not going
> > > to be much anyway, maybe 10 or 20 bucks) it's the exercise which is
> > > important.
> > >
> > > Yes, no code required to do the data generation and transmission.
> > > ---
> > >
> > > John Fields
> > > Professional circuit designer
> > > http://www.austininstruments.com
> > All right than. Actually, Matt, the circuit is not that bad for the first
> > Except for that 100K resistor. Take it out.
> > I'm not familiar with PIC, but attaching switches directly to Vcc or
> > could be problematic. It might be better to connect them via resistors to
> > damage to the drivers.
> > Any thoughts from PIC experts, anyone?
> > Good luck with the project.
> > Marko
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