Meet sometimes with publications on the extension of the period of operation of the lamps filament and think "well, maybe it is cheaper to buy new instead burned than to make intricate designs but still pay for the electricity consumed powered additional resistance installed in them? And it really is great the inrush current when you turn, say, light bulbs low power, for example less than 40 W to translate it in mode "with nedoklan"?"
Or take a "cost-effective" circuit with a ballast on the thyristors. After all, in them too there is a loss on heating. In addition, these advertised devices often generate strong interference with the radio must be set up, and work (I'm sure) is unstable.
Offer me same technical solution does not have the above disadvantages. To also makes for a more smooth ignition of the bulb. And the scheme (see figure) - couldn't be easier.
Selecting the appropriate capacitance and diodes, click here connect a light bulb practically any power and without any tension step-down transformer. For example, 220 V and 60-watt bulbs with those semiconductor valves need capacitors, respectively, 5 IFF.
Author: V. Circles, Orel