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He's talking about the motion detector things that are a drop in replacement for switches. You see them often in rooms in commercial buildings. Something like
by throwaway0a5e 5y ago
He's talking about the motion detector things that are a drop in replacement for switches. You see them often in rooms in commercial buildings.
Something like this https://i.ebayimg.com/images/g/nvAAAOSwEK5fmkrH/s-l1600.jpg https://i.ebayimg.com/images/g/nvAAAOSwEK5fmkrH/s-l1600.jpg
- kwhitefoot 5y ago> He's talking about the motion detector things that are a drop in replacement for switches. No I'm not, but those work too. This is what I bought: https://www.ebay.com/itm/153285261299 https://www.ebay.com/itm/153285261299 It is described as a radar sensor because it uses a high frequency oscillator and monitors the change in the signal due to things moving in the electromagnetic field. Imagine the effect of waving your hand near the aerial of a radio receiver when the signal is weak.