How to make an LED light bulb behave like the real thing
Technology Editor, Steve Bush, asks What do you have to do to make an LED-based light bulb behave just like the real, inefficient, thing?
The article begins:
Beyond getting enough light, the first big battle is working with the huge installed base of dimmers, all designed to work with incandescent loads.
Domestically, dimmers are connected in series with the light bulb and work by conduct for a variable part of the mains cycle.
When the dimmer’s triac or mosfet is off, the dimmer continues to need a load to maintain its timing circuits.
“Dimming is one of the great problems,” Jacques le Berre, business development director at NXP told Electronics Weekly. “LED lamps with equivalent light output take only a tenth of the current.”