Smooth ignition of lighting. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Smooth ignition of lighting. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Lighting

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In principle, this design is a clear illustration on the topic: laziness is the engine of progress. Tired of going to the store to buy light bulbs.

(click to enlarge)

When using this device, the lamp life is significantly increased, some specimens work up to 4 years. This effect is provided by the gradual heating of the filament, as you know, the lamp burns out at the very moment it is turned on. In addition, when turned on at night, there is convenience in terms of a smooth change in illumination, since the eyes have time to adapt and there is no glare effect.

R5 determines the level of the initial glow of the light bulb. R7 determines the slew rate, within 3-5 seconds, a smaller value does not protect the lamp from burning. R1 provides the necessary supply voltage (requires selection when the lamp flickers with interference in the network).

It is recommended to install it in a wire break near the switch, or, if it spoils the aesthetics of the room, directly next to the lamp (possibly in it).

Publication: cxem.net

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