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People use bimetallic switches for all sorts of cycling controls. Turn signal flasher, on switch in my coffee pot which turns off the heat element when the water cycle is finished. Even have one in my self controlling night light that responds to dusk.
Bunch of advantages of mercury tilt switches, however everyone is freaky about mercury contamination so they have gotten nonexistent.
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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