the only true binary sensor i can think of are good old fashioned mechanical swi... | Hacker News

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		choonway on Feb 2, 2022 \| parent \| context \| favorite \| on: mmWave radar, you won't see it coming the only true binary sensor i can think of are good old fashioned mechanical switches.

samatman on Feb 2, 2022 | [–]

Mercury switch on a bimetallic strip (old-school thermostat) counts, same basic principle.

stingrae on Feb 2, 2022 | [–]

reed switch

relaxing on Feb 2, 2022 | [–]

is an old fashioned mechanical switch.

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