In the last section we saw that a dimmer switch rapidly turns a light circuit on and off to reduce the energy flowing to a light switch. Through the use of a triode ac switch triac which is a type of relay the light circuit.
How A Dimmer Switch Works
How does a dimmer switch work. This includes n type material which. This happens twice per cycle or 120 times a second. The driver or ballast then regulates the current going to the led or fluorescent fixtures. Modern dimmer switches work an entirely different way. This switching cycle is based on the way household ac current. Modern resistors function by quickly switching the light circuit on then off.
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 can make a room much more versatile. Like a transistor a triac is made up of different layers of semiconductor material. The downside to using a 0 10v dimmer is that it requires two additional low voltage wires to be running from the dimmer switch to each fixture. Does a light dimmer just reduce the voltage to the lamp. Because they sort of chop up the electrical power this way they are sometimes called chopper switches one cycle of household 60 hertz or 60 cycle ac electrical power is shown in the figure.
This turn on value is based on the position of the dimmer switchs knob or slider. Essentially the technology inside the dimmer switch controls the flow of electricity to your lights by turning it on and off many many times per second. By altering the amount of power delivered to a light source a dimmer directly affects the level of light output from that source. How dimmer switches work. With a simple switch we either turn the light on meaning we close the circuit delivering full power. Lets take a closer look at how a dimmer switch works.
Todays dimmer switches modern ones meaning since the 90s dim your light very efficiently. A light dimmer is a piece of equipment that lets you adjust the light intensity of a bulb from low to high through the use of a triac that restricts the flow of electricity to decrease the light of a bulb. Plus its convenient to use one bulb rather than a variety of bulbs with different watts to light a room. What is a triac. It works but theres a superior way. Watch the video and find out what the output of a dimmer really is.
A triac is a small semiconductor device similar to a diode or transistor. How does a dimmer switch work. The more power delivered the higher the light output. Are you still asking the daunting question of how does a dimmer switch work the basic principles of how a dimmer switch works. The less power delivered the lower the light output. How does a dimmer switch work.
A modern dimmer switch chops up the sine wave. If the dimmer is turned to a brighter setting it will. A dimmer switch handles off on and everything in between. It turns the light circuit back on when the voltage climbs back up to a certain level. Using this approach the total amount of electricity traveling through the circuit is reduced. A 0 10v dimmer sends an analog signal directly to either the led fluorescent driver or ballast.
Diverting energy from the bulb into a resistor is not the best method of dimming lights. A regular light switch takes care of off and on. For more information and explanation as well as component parts see. Hertz means cycles per second and ac means alternating current its called alternating current because for one half of. They use a transistor like device called a triac to switch the electricity on and off very rapidly 120 times each second. The two extremes of light output range are of course achievable by a simple switch.
Find out what this clever switch does with electrical current. The central element in this switching circuit is a triode alternating current switch or triac.
Gallery of How Does A Dimmer Switch Work
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