Dimmer Switches Work
The problem is that people need to use some rooms for multiple purposes, and these different functions call for varying amounts of light. Enter the dimmer switch, a handy electrical component that lets you adjust light levels from nearly dark to fully lit by simply turning a knob or sliding a lever.

In this article, we'll look inside one of these everyday devices to find out how it controls lamp fixtures. As it turns out, the inner workings are pretty cool -- and surprising. Modern dimmer switches work in a totally unexpected way.

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