I was bothered by the relative largeness of my previous microscale repeaters. Multiple z-levels, not taking advantage of relays, still something moving to the naked eye, and generally pretty heavy carts used. Can't I shrink them smaller and lighten the load?
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I can (after some mishaps and discoveries). Four cart five tile(+walls for ramps) cycler.
Want a season change checker? From top to bottom, newest to oldest cart weights 33 (mangrove) - 86 (birch+glumprong log) - 18 (ginkgo) - 103 will do it (tested 100800, 747
westeastward, 100053 northward). Or possibly numerous other arrangements with
searching tool around 100798, affected bit by build order. (Though it isn't 100% always accurate and not at all accurate if one tries to keep cart weights within ½ of each other.)
As the cart speeds top at less than half of min roller speed - and they only move on 8 ticks a year - it's pretty safe to plant whenever.
Now, on followed by off two thirds a day later is useful for things like brief targeted fire. But sometimes, I really want month-long toggles for bridges, grates, etc., for stuff like forcibly ejecting people from barracks or zones.
Track Ramps/Buildings
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S being medium friction track stop. Tested, 33600 total length (of which 29 are in the loop outside "L") with cart weights 19-88-30-79 top-to-bottom older to newer (for last cart, any weight from 76 to 80 should theoretically work).
The additional loop and stop are necessary to stop the cart by colliding it with the bottommost wall diagonally. Cart takes 10 steps total on central ramp - ew track - center-west ramp (for the purposes of priming, which can be exact with deconstruct-toggled bridges. In general, leaving 1 ramp tile undug before start is useful way to move carts to tile edges at start).
Estimating downsizing potential and extending it with principles in Larix's eternity clock, it should be possible to make lunar clock with just 6+n mechanisms, 5 minecarts and 1 hatch and 5(day)+26(days)+3(-1 day)+2(relay)+14(moon counter)=50 tiles of track (+walls); much smaller than itg's werebeast clock counting system.
Possibly less, if one gives up ability to target arbitrary days. (n being the number of mechanism one uses to trigger desired thing). But since titans are random and also something you want to bait, there's nothing terribly useful to link to werebeast cycler (bait can be protected from sieges with much smaller seasonal repeater earlier).