Changes

===Switching circuit===

===Switching circuit===

Rather than resisting the flow of electricity, switching circuit dimmers simply cycle the power on and off.  They work on [[alternating current]] be shutting of the flow every time the sine wave cycles to zero, then connecting it again a split second later. AC current completes sixty cycles per second, and in every cycle the sine wave comes to zero twice.  This means that 120 times every second, the first part of each positive and negative sine wave is "chopped" off.  The amount of the wave which is cut off can be adjusted, so that more or less of each wave can pass through.<ref name="howstuffworks 2">http://home.howstuffworks.com/dimmer-switch2.htm</ref><br />

Rather than resisting the flow of electricity, switching circuit dimmers simply cycle the power on and off.  They work on [[alternating current]] be shutting of the flow every time the sine wave cycles to zero, then connecting it again a split second later. AC current completes sixty cycles per second, and in every cycle the sine wave comes to zero twice.  This means that 120 times every second, the first part of each positive and negative sine wave is "chopped" off.  The amount of the wave which is cut off can be adjusted, so that more or less of each wave can pass through.<ref name="howstuffworks 2">http://home.howstuffworks.com/dimmer-switch2.htm</ref><br />

As portions of the waves are cut off, the net power allowed through is reduced.  Although this does cause the output to be inconstant, most people will not notice since it is so quick, the the human eye, nerves, and brain can only process visual input at a limited speed. (This speed is not knows precisely, though some approximate that about 60 frames per second (FPS) can be processed, and others simply say that the processing rate is over 43 FPS.)<ref>https://tech.slashdot.org/story/14/12/24/1415207/human-eyes-oscillation-rate-determines-smooth-frame-rate</ref><ref>http://www.sciencedirect.com/science/article/pii/S0042698998003228</ref><ref>http://wolfcrow.com/blog/notes-by-dr-optoglass-motion-and-the-frame-rate-of-the-human-eye</ref>  However, some do actually notice this effect, and usually report that it is irritating.  Others report that light emissions which have been "dimmed" in the manner seem harsh, but cannot identify why.  (For this reason, some dislike the [[LED]] Christmas lights, and certain other such products)

As portions of the waves are cut off, the net power allowed through is reduced.  Although this does cause the output to be inconstant, most people will not notice since it is so quick, the the human eye, nerves, and brain can only process visual input at a limited speed. (This speed is not knows precisely, though some approximate that about 60 frames per second (FPS) can be processed, and others simply say that the processing rate is over 43 FPS.)<ref>https://tech.slashdot.org/story/14/12/24/1415207/human-eyes-oscillation-rate-determines-smooth-frame-rate</ref><ref>http://www.sciencedirect.com/science/article/pii/S0042698998003228</ref><ref>http://wolfcrow.com/blog/notes-by-dr-optoglass-motion-and-the-frame-rate-of-the-human-eye</ref>  However, some do actually notice this effect, and usually report that it is irritating.  Others report that light emissions which have been "dimmed" in the manner seem harsh, but cannot identify why.  (For this reason, some dislike the [[LED]] Christmas lights, and certain other such products.)

===Triode alternating current switch===

===Triode alternating current switch===