From: "Matt Foster"
References: <email@example.com> <1xgR9.2310$tQ1.firstname.lastname@example.org> <email@example.com>
Subject: Re: RS232 newbie - in need of assistance!
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Date: Fri, 3 Jan 2003 16:19:24 -0000
NNTP-Posting-Date: Fri, 03 Jan 2003 16:19:21 GMT
Organization: blueyonder (post doesn't reflect views of blueyonder)
I took it out as requested!
"PCS Electronics" wrote in
> > 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.
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