Amongst the issues of 12v led strip lights is one of the latest challenges still yet to be fully solved. Dimming LEDs is theoretically easy, because analogue dimming, that is the adjustment of current, has always been an option. However, this technique only works safely when used with one LED bulb. Systems of LEDs need a more sophisticated way of dimming. The two basic forms of dimming are definitely the PWM or Pulse-Width-Modulation and also the analogue dimming, each of which are switched-mode regulators. Both of these types are similar in the sense that they both control the time-averaged current through the diode.
Analogue dimming is a very simple method of dimming, it is the adjustment of cycle-by-cycle in the LED current regulated using 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 one particular light. Systems of LED lights require a more refined technique. The problem of dimming a method of LED lights is there are various kinds of LEDs, requiring various ways for dimming. If you have a process of lights we wish to dim, the many LEDs may react diversely for the same amount of current, and as the current is reduced some LEDs can change off later or earlier than others. Also, analogue dimming largely changes the color of the light, similarly to when it is combined with incandescent lights.
By far the most frequently used technique of dimmable led is Pulse-Width Modulation, which can be fundamentally the cutting in the phase in a certain frequency. PWM switches the devices between fully on and fully off in a frequency that can not be told from the human eye, therefore LED bulbs always run on the forward current recommended. The regularity of switching determines the brightness of light, so the longer the lighting is “on” the brighter the light is going to be. This is the same technique utilized in incandescent light dimmers also, other than incandescent lights respond to current slower, and for that reason need a different frequency.
Two types of Pulse-With Modulation signals are used often with dimming light: the top-edge and the trailing edge techniques. These two will vary methods for cutting the phase, and lead to separate dimming technologies. Probably the most commonly used dimmers of LEDs use solely the top-edge technology.
Dimmers marked as R or RL are compatible with most dimmable LEDs, given that they work with the leading edge technology and never include electronic transformers. TRIAC drivers, or devices governed from the DMX and digital addressable lighting interface (DALI) protocols and, in the future, can include wireless (RF) being a control option, that is certainly dimmers that turn or slide having a knob, all work with dimmable LEDs. Alas leading edge technologies controlled using a touch or push button, are nzyjty powered by an electric powered transformer, excluding many dimmable LEDs.
The other kind of phase-cutting strategy is trailing edge technique, usually found in MOSFET or is not suitable for the majority of dimmable LEDs. One of many latest inventions appearing on the market is the RAIS lamp technology. RAIS lamps provide a higher amount of functionality and seem to work alongside all kinds of dimmers available on the market. However RAIS technology continues to be new, as well as its long-term effect on LEDs have not been fully tested. When they turn out to be trustworthy their application both domestically and commercially, can grow to be much safer and much easier than previous dimmable LED lights’.
In the ever-evolving technologies of LED lights, led drivers are still to become created to further compatibility and performance. Since there is no general rule for the purpose dimmer your LED could be suitable for, make sure the technical details with all the distributor. Use of LED lights with non-compatible dimmers might ruin the LEDs, and they are generally, currently, not the least expensive solution of lighting.