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Three switches

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Calvesy | 14:17 Sat 11th Jun 2005 | How it Works
4 Answers

The landing light where I live is controlled by three switches, each of which can change the on/off state of the bulb.

How the dickens does that work?

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Avatar Image ezapf
Just click: 4 way switch animation and watch the picture.
14:30 Sat 11th Jun 2005
Avatar Image Dom Tuk
ezapf that is superb....5 stars
20:22 Sat 11th Jun 2005
Avatar Image ezapf
Thank you, Dom Tuk. I will accept one star and send the other four on to Mr. Matthews of Wake Forest University.
01:35 Sun 12th Jun 2005
Avatar Image VINNY100_2
If you live right at the top of your building and have to keep pressing the switch,just force a matchstick into the first one and the light will stay on all night!!( :)
23:43 Sun 12th Jun 2005

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Three switches

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