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User:Gregorah
Mechanical Pull-up Pull-down logic[edit]
Basically written because the Mechanical logic page is infeasible for large projects. I propose a new method.
All logic, when using a mechanical logic system, should be implemented with positive logic. This means heavy use of logic equivalences to get a complicated formula into a simple one.
Note that all of these are on-by-default. We're assuming that a lever's default state is 'OFF' so use of these results in on-by-default.
NAND Logic: NAND is implemented by putting gear assemblies linked to the inputs in series:
=ab=
NOR Logic: NOR is implemented by putting gear assemblies linked to the inputs in parallel:
=*a*= *b*
XNOR Logic: XNOR is implemented by putting gear assemblies all linked to one lever.
=*=
TODO: Link them together. Give Examples. Show where the 'PUN/PDN' comes in.