Soft light. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Lighting
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Advantages of turning on a conventional incandescent lamp according to the "Soft light" scheme:
- there is no flickering of the lamp, which adversely affects the condition of the eyes;
- the service life of the lamp increases several times;
- the scheme is simple, reliable in manufacture and does not contain scarce and expensive parts.
It is convenient to place the scheme in the body of a floor lamp or lamp, if they have free spaces.
When voltage is applied, the capacitor C2 charges within 0,4 ... 1 second (depending on the capacitance C2), i.e. the filament of the lamp warms up smoothly and cannot burn out from the surge of current.
VD1 - VD4 can be replaced with KD206B, KD210B, KD243D, KD209B, D247. C2 - 100...330 mF for voltage 350...400 V. C1 for a voltage of at least 300 V and is selected experimentally depending on the power of the incandescent lamp.
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