I think I understand where I'm going wrong now. I just ordered some
16F648As and some MAX233s to do the level conversion. Hopefully I'll
do a little better with them!

I like the level converter you linked to, but I decided to try the
MAX233 for now. This project will eventually need to fit into a small
case, so I'll have to use something else eventually anyway.

Thanks for the help!

 IC,PIC16F648A-I/P,Flash 8bMCU          3      3.2500        9.75
   106163    IC,DRV/REC,MAX233CPP,5V,DIP-20

On 6/22/06, Olin Lathrop <olin_piclist@embedinc.com> wrote:
> Jim Robertson wrote:
> > but Olin has something along these lines
>
> Thanks, yes I do.  It's called the RSLink
> (http://www.embedinc.com/products).  It has a DB-9 connector on one end that
> connects to a PC COM port via a straight thru extension cable.  On the
> Microcontroller side you connect it to 5V, ground, and the PIC UART RX and
> TX lines.  It does the signal inversion and level conversion to RS-232.
>
> It would be easier and cheaper to use a PIC with a UART built in.  The
> 16F648A has the same footprint, a hardware UART, more program memory, more
> RAM, a few other nice peripherals, and costs less than the 16F84.
>
>
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-- 
Ben Sinclair
ben@bensinclair.com
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