Leading edge dimming stops AC current flow as the sinusoidal waveform reaches zero and starts it back up as it reaches the peak. These traveler wires connect the three-way switch to another switch in a different location.įour-way switches are used for controlling lighting systems Leading Edge. They use a four-wire design, replacing the neutral wire with two traveler wires. Three-way dimmer switches are complicated electrical devices that control one or more bulbs from two different locations (or switches). Single pole switches have one on/off button and a slider or dial that controls the brightness. This is the most standard form a TRIAC dimmer can take. It uses a simple three-wire design consisting of a hot (live) wire, a neutral, and a ground. Single Pole SwitchesĪ single pole dimmer switch can control one light at a time. But when installed in a multi-location switch, the TRIAC dimmer circuit can dim more than one light from two or more locations.Ī short list of the most popular light dimmer switches can house a TRIAC dimmer. On its own, a TRIAC dimmer circuit can only dim one light from one location. TRIAC dimmers are circuits that need to be installed into different switch housings to increase their capabilities further. Depending upon the configuration, TRIAC Dimmers can act as leading edge dimmers and trailing edge dimmers. Trailing edge dimmers are commonly branded as LED-Ready dimmers for clear and concise marketing. The opposite of the leading edge is Trailing Edge Dimming which is limited to sensitive electronics like LEDs that could get damaged from a sudden burst of current. TRIAC is a type of leading edge dimming driver that provides light bulbs with a burst of electricity every half AC cycle. A TRIAC dimmer is necessary for maximizing AC dimming efficiency. Therefore, a specialized electrical circuit, like a TRIAC, is required to dim AC devices. TRIAC dimmers use thyristors to allow AC current flow in both negative and positive directions. Using DC dimmers on AC devices will reduce the positive current but cannot process the negative current. Contrarily, AC (Alternating Current) flows as a sinusoidal wave, going from positive to negative. Hence, DC dimming can be as simple as connecting a bulb to a variable power supply that can limit the current flow. DC DimmingĭC (Direct Current) is a direct flow of electrical current at a single consistent rate. You can use them to dim the lights around your house using a dial easily. TRIAC dimmers are an excellent and convenient way to control lighting systems. Longer delays between the electrical pulse will result in a much dimmer light bulb. The bulb appears dim to the human eye because it is flickering on and off hundreds of times a second. But a TRIAC dimmer limits the current and sends it to the bulb in pulses. A normal bulb runs at full power because it receives a constant flow of electricity. The bulb will turn off if you stop the current flow to the gate. Hence, if a current passes through the gate, the circuit will close, and the light bulb will turn on. Thyristor dimmers can only work if current actively passes through the gate. Thyristors are unique devices with a three-electrode design consisting of an anode, a cathode, and a gate. TRIAC (Triode for Alternating Current) is a type of semiconductor called a thyristor that can limit the amount of AC current flowing through a lamp. This dimmer switches work with incandescent bulbs, halogens, CFLs (compact fluorescent light bulbs), and some LED light bulbs. There are almost as many light dimmers available on the market as there are lighting technologies. TRIAC is a light-dimming technology used in various dimmer switches to control light bulb illumination. This article breaks down the fundamentals of TRIAC dimmers and gives you the basic know-how required to set up your own dimmable LED lights. Stepping into the world of dimmable lighting can be overwhelming with confusing terms like TRIAC, thyristors, sinusoidal waves, etc. we have many distributors in China and our products are sold in famous B2C platform like Taobao, amazon, aliexpress, ebay worldwide,so our quality and service are reliable.Lighting plays a fundamental role in the look and feel of a workspace, and dimmable LEDs are the next big step in improving your lighting setup. We are a leading manufacturer of power supplies in Hangzhou,China. We accept werstern union, TT or other payment are accepted. We are manufacturer so usually we have stock for thousands pieces, so for small order, we can send out the goods within 7 working days after payment.
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