This page has been robot translated, sorry for typos if any. Original content here.

Eternal electric lamp

Attention !All paid and free information on this site is presented solely for educational purposes.
The author of the site does not bear any responsibility for any possible consequences of using this information.
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 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.
схема

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 R5-2.7 m0m R6 - 160 k0m C1 - 2.0 uF