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Eternal electric lamp

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Eternal electric lamp

How to make a simple light bulb
The device is placed and fits in or near the switch. It allows you to smoothly turn on the El / lamp, i.e., to the nominal value, to increase the current through the El / lamp for 1 second after it is turned on. This will significantly increase the service life of El / lamps up to 10-15 years or more. The reason for the rapid destruction of the filament El / lamp is that at the moment of switching on, because of the low resistance of the cold filament, an initial current pulse flows through it, many times higher than the nominal value. And as you noticed, the lamp always burns out while it is turned on.
The scheme allows you to work with e / lamps 100-200 watts.

IDENTIFICATIONS: VD1-VD4 - KD105B (for 100 W) and KD202ZH, KD202S (for 200 W) VD5 - KU201K, KU202K-N U06-D220 (for 100 W) and silicon low-power (for 200 W) U07-D814A VT1, VT2 - КТ315Б (for 100 W) and any low-power silicon of the corresponding structure with a static current transfer ratio of at least 50 (for 200 W) R1 - 1 kΩ R2, R3 - 10 kΩ R4-100 kΩ P5-2.7 m0m R6 - 160 k0m C1 - 2.0 uF