Dr. Imre Bartfai wrote:
>
> Hi,
> I have had similar problems. I can recommend the so-called Port Expander
> (Stretcher). It is not other than a PIC16C57, already programmed, at us it
> costs $3. Its firmware has an one-line serial bus (2400 baud; it is the
> limitation), and you can control so additional 16 port bits (the full B
> and C port of it). It is cheap and nice. My PIC design uses 4 MHz and with
> this xtal I can drive also the said 16C57. AFAIK it is made by Parallax.
> It is the ideal solution until you need speed.

the full source and hex file can be found at:
http://www.dontronics.com/see.html

This is part of the On-line version of the Scott Edwards Electronics Pic
source book for the Basic Stamp 1.

Don McKenzie  mailto:don@dontronics.com   http://www.dontronics.com

Don's Download Dungeon: http://www.dontronics.com/download.html
For more details, send a blank message to mailto:info@dontronics.com
or mailto:simstick@dontronics.com or mailto:basics@dontronics.com