The method of resuscitation of LDS. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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The method of resuscitation of LDS. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Radio amateur designer

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Fluorescent lamps (LDS) are still popular because they are a more economical source of light compared to incandescent lamps. But, unfortunately, the filaments of such a lamp are not eternal and after a while one of them burns out. The lamp has to be thrown away.

There are many ways to extend the "life" of an LDS with a burnt out filament, which have already been described on the pages of the Radio magazine. I offer another way.

LDS resuscitation method

The standard option for switching on the LDS is shown in fig. A. If you need to power the LDS with one burned-out filament, the main parts of the starting device - the inductor L1 and the capacitor C1 - should be turned on as shown in Fig. b. Moreover, the resistor R1 and the starter SF1 are removed, and the device is supplemented with an interference suppression capacitor with a capacity of 0,033 to 0,05 μF for a rated voltage of at least 400 V and a start button SB1. The terminals of the burned-out lamp filament close (the jumper is shown by a dashed line).

Now it is enough to briefly press the button to warm up the remaining thread, and the lamp will flash. If its light flickers, you will have to press and release the button again.

Unfortunately, a lamp with two burnt filaments does not light up with this device.

Author: Zh.Eserkenov, Aktyubinsk, Kazakhstan

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