I've been considering cat triggered pressure plates for Repeater's.
Literally a room big enough for a pressure plate and a door, designate a pen, pen a cat in there, lock the door, and have the pressure plate hooked up to something like a danger room.
Would this work?
Animals without path don't tend to move.
It would be slow, but you could make an
animal logic based repeater:
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#+###+#
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Creature (not a cat, they're too small) is placed on one of the two southeast tiles. Both doors adjacent to the creature are tightly closed, but not forbidden. The third, northwest door, is opened by the pressure plate. It works based on controlling the shortest path (probably to meeting hall or owner, where the animal wants to get to.) When it steps on the pressure plate, it's shortest path is to the west, so it moves to the west, causing the door to close, making the shortest path to the northeast, causing the creature to move to the east tile, etc. But animal logic isn't very reliable, and it tends to have high latency.
If you want something more reliable, look at the wiki page for repeater or creature logic-- you could always build that repeater with civs trigger and drop a domestic in to run it.
Have anyone noticed that you could just link spears to lever and set lever on repeat? Much easier and faster to do than any kind of repeaters or pressure plates.
Probably true, for people who don't enjoy engineering challenges. For people who like machinery, figuring out a nicely automated system is its own reward.