Eternal electric lamp
|Eternal electric lamp|
How to make a simple light bulbThe 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 small 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 burns out always during its switching on.
The scheme allows you to work with e / lamps 100-200 watts.
IDENTIFICATIONS: VD1-VD4 - КД105Б (for 100 W) and КД202Ж, КД202С (for 200 W) VD5 - КУ201К, КУ202К-Н У06-Д220 (for 100 W) and silicon low-power (for 200 W) U07-Д814А 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