Dan,

"Nobody seems to care." When did you bring it up?

Powered logic gates have been simulated in Phun. Go to
http://phunland.com/phunbox/ and search "logic gates" (include quotes).

Examples of logic used in the Zuse Z1 can be seen at
http://user.cs.tu-berlin.de/~zuse/Konrad_Zuse/en/z1-metal-sheets.html. Zuse
built a binary, floating-point computer in the late 1930's. It normally ran
from a motor but it had a crank option. There are advantages in using his
clocked logic instead of directly coupled combinational logic.

The logic descriptions on your XOR gate and carry logic are near the wrong
mechanisms.

I like designing with marble-powered logic because its complexity is only
limited by the size of the wall.

Regards,
Bob S.



-----Original Message-----
From: shkaboinka

My interest with DigiComp comes from my obsession with trying to design
mechanical logic gates.

I thought this would be the place to share this idea, but so far nobody
seems to care :P

From here: http://groups.google.com/group/shkaboinka/files click on
"logic.bmp"