I'm making a set of light-up paving stones for a walkway, with PIC=20
microcontrollers driving them, and a communications channel between=20
them.  They'll only be a meter or so apart, and the cable buried in the=20
ground (possibly in concrete).

Rather than the expense of running RS-485 transceivers on each node,=20
would it be practical to run a plain TTL level line from one to another,=20
and do some kind of synchronous serial protocol over that?

I'm trying to figure out if that would be dangerous corner-cutting or a=20
wise avoidance of overengineering waste :)

TIA,
Steve

--=20
Steve Willoughby / steve@alchemy.com
"A ship in harbor is safe, but that is not what ships are built for."
PGP Fingerprint 4615 3CCE 0F29 AE6C 8FF4 CA01 73FE 997A 765D 696C
--=20
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