Repair of fluorescent lamps on transistors. Table lamp with ballast from an energy-saving lamp. Radio engineering, electronics and do-it-yourself circuits

And you, flashing table lamp? I have a local lighting fixture, or rather a table lamp. I use it all the time and everything would be fine, but the lamp used daylight at 11 watts, at times, well, it doesn’t want to light up at all, but instead, it just constantly blinks. As I understand it, the lamp cannot enter normal operation. Need . To ignite it, you first need to apply overvoltage on the electrodes, if this is not here and flashing table lamp.A choke is installed in the plug of our table lamp, it does just that together with the starter.

In large lamps, the starter is placed separately, in my case it is located in the lamp base. However, not in it, not in a lamp or a choke, but in the floating mains voltage and old electrical wiring in the house. But get rid of what flashing table lamp It's still possible if you do it. Now many people use energy-saving lamps, in the collapsible base of this lamp there is electronic circuit, which is called electronic ballast. In my experience, the filament of the lamp itself often burns out, and the electronics are able to continue to work. Here's what I have to improve. It is only important that the power of the table and energy-saving lamps match or differ slightly. For example, for 11W, on one of the modified lamps, I installed electronics from a 9-watt energy-saving one. But the ideal option is one to one. What is needed to do for refinement in table lamp:

That's it ... I didn't have any more similar problems,

Desk lamp with ballast from energy saving lamp

Table lamps are devices that have their own specifics, lamps with fluorescent lamps - especially. The lamp is not located as far from the eyes as the chandelier, so the flickering of the lamp at such a close location is especially noticeable. Lamps with incandescent lamps do not have such an inconvenience, while lamps with fluorescent lamps have it, on the contrary, it is pronounced, which is not surprising, because they are assembled according to a standard throttle circuit with a starter.

It would be nice to replace the choke circuit for turning on the lamp in table lamp on electronic (electronic ballast), for example, from a burned-out energy-saving lamp, especially since many lamps have enough space for this. In this case, the standard choke becomes unnecessary and is removed from the luminaire.

Another feature that needs to be taken into account is the fact that table lamps are switched on only as needed, that is, frequent switching on and off is implied.

And this, as you know, significantly reduces the life of the filaments of lamps in standard electronic ballasts without soft start. From the article about altering ballasts, we already know that any ballast can be supplemented with a thermistor and significantly increase the life of the lamp filaments. This must be used when altering the lamp.

In lamps, lamps with a power of 9 and 11 watts are most often used, so electronic ballasts from a 13W energy-saving lamp are ideal. The lamp for the converted lamp must be prepared in advance: it is necessary to remove the starter, which is located in the plastic base and replace it with a capacitor soldered from the electronic ballast board. Diagrams of electronic ballasts from energy-saving lamps can be viewed.

The photo above shows a disk NTC thermistor, which protects the lamp filaments from inrush current at the moment of switching on. The lamp in such a lamp with a converted electronic ballast did not burn out in several years. In a standard choke switch, the lamps in the fixtures burn out once every six months.

When installing electronic ballasts in the lamp housing, it is necessary to carefully check the insulation of all parts, since they are under mains voltage.

The converted lamp shines brightly (because the lamp power is slightly higher), does not buzz or flicker.

U.P. 02/14/2011 A few more photos.

Remodeling the lamp. The photo shows the removed plastic T-shaped base, and the disconnected starter and capacitor. These details are no longer needed.

A resonant capacitor from the electronic ballast board is soldered between the lamp filaments, as well as a PTC thermistor, if there was one on the board.

This is how the ballast from an energy-saving lamp (electronic ballast) looks like:

Option 1: Installing an electronic ballast in place of the standard lamp choke. The disadvantage of the method is that a new switch must be installed nearby.