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How do magnetic switches work?

Asked by pallen123 (1507 points ) December 29th, 2013

I’m looking for a low cost magnetic switch for a hobby project that will turn on when put in contact with steel. I was thinking of using a window or door security switch but I don’t really know how those work. Do those consist of a magnet side and a metal side or two magnets? Should it work for my purposes?

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