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Amongst the issues of led light transformer is one of the latest challenges still yet to be fully solved. Dimming LEDs is theoretically easy, because analogue dimming, which is the adjustment of current, has long been an option. However, this process only works safely when combined with one LED bulb. Systems of LEDs demand a more sophisticated method of dimming. Both basic types of dimming are definitely the PWM or Pulse-Width-Modulation and the analogue dimming, each of which are switched-mode regulators. Those two types are similar in the sense that they both control the time-averaged current through the diode.

Analogue dimming is an extremely simple method of dimming, it will be the adjustment of cycle-by-cycle of the LED current regulated having a potentiometer. The present is adjusted for the LED increasing and decreasing its intensity.

The downside of analogue dimming is it only works safe provided that we dim a single bulb. Systems of Leds require a more refined technique. The problem of dimming a system of LED lights is that we now have various types of LEDs, requiring various ways for dimming. If there is a system of lights we want to dim, the different LEDs may react diversely to the equivalent amount of current, and as the current is reduced some LEDs can turn off later or earlier than others. Also, analogue dimming largely changes the colour of the light, similarly to when it is used in combination with incandescent lights.

The most frequently used technique of 12v dc power supply led is Pulse-Width Modulation, that is basically the cutting of the phase in a certain frequency. PWM switches the devices between fully on and fully off with a frequency that cannot be told through the eye, therefore LED bulbs always run on the forward current recommended. The regularity of switching determines the brightness of light, therefore the longer the lighting is “on” the brighter the sunshine will be. This is actually the same technique used in incandescent light dimmers too, with the exception that incandescent lights respond to current more slowly, and for that reason need a different frequency.

Two types of Pulse-With Modulation signals are utilized often with dimming light: the leading-edge and the trailing edge techniques. Those two are different ways of cutting the phase, and result in separate dimming technologies. By far the most frequently used dimmers of LEDs use solely the key-edge technology.

Dimmers marked as R or RL are compatible with most dimmable LEDs, given that they work with the top edge technology and you should not include electronic transformers. TRIAC drivers, or devices governed by the DMX and digital addressable lighting interface (DALI) protocols and, down the road, may include wireless (RF) as being a control option, which is dimmers that turn or slide with a knob, all work with dimmable LEDs. Alas leading edge technologies controlled using a touch or push button, are nzyjty powered by an electrical transformer, excluding many dimmable LEDs.

One other kind of phase-cutting technique is trailing edge technique, usually found in MOSFET or possibly is not suitable for almost all dimmable LEDs. One of the latest inventions appearing on the marketplace is the RAIS lamp technology. RAIS lamps provide a higher level of functionality and seem to work alongside all sorts of dimmers available on the market. However RAIS technology continues to be new, as well as its long-term influence on LEDs have not been fully tested. When they prove to be trustworthy their application both domestically and commercially, can turn out to be much safer and simpler than previous dimmable LED lights’.

Within the ever-evolving technologies of Leds, LED Constant Voltage Waterproof Power Supply remain to become developed to further compatibility and performance. While there is no general rule for what dimmer your LED could be appropriate for, check the technical details with all the distributor. Application of Leds with non-compatible dimmers might ruin the LEDs, and they are generally, at the moment, not the cheapest solution of lighting.

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