Question about Clarion XMD3
In the set-up there is a dimmer function that can be set to "on" or "off". I assumed there would be an input to connect to the lights for a signal to dim the lights. I cannot find any such wire.. How does the dimmer work?
Early dimmer switches had a pretty straightforward solution to adjusting light levels -- a variable resistor. An ordinary resistor is a piece of material that doesn't conduct electrical current well -- it offers a lot of resistance to moving electrical charge. A variable resistor consists of a piece of resistive material, a stationary contact arm and a moving contact arm.
A modern dimmer switch "chops up" the sine wave. It automatically shuts the light bulb circuit off every time the current reverses direction -- that is, whenever there is zero voltage running through the circuit. This happens twice per cycle, or 120 times a second. It turns the light circuit back on when the voltage climbs back up to a certain level.
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Posted on May 14, 2009
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Posted on Jan 02, 2017
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