hysteresis is a valuable quality in switching.
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4 years ago
Silent wall switches
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4 years ago
Think it would be more difficult to make a silent version due to the weight etc of the pull cord. And that it has to be pretty strong.
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4 years ago
My old 1970s one is fine, the modern one is noisy.
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4 years ago
Many of the 'smart' light switches (which generally also have an over ride button) need a neutral and aren't compatible with most UK switch arrangements but there are a few which have small (typically a coin cell) battery to power the electronics. You need to look at the more specialist retailers to find them. I've no idea of the battery (cell) life.