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Why silent light switches are banned
Thursday October 6, 2022. 08:21 PM , from BoingBoing
You've probably encountered silent light switches before. Unlike regular light switches, which make a distinctive click, silent light switches operate smoothly without a sound.
This video takes apart a silent light switch to reveal the secret — it contains a drop of liquid mercury in a sealed capsule. — Read the rest
https://boingboing.net/2022/10/06/why-silent-light-switches-are-banned.html
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