Second life... fluorescent lamps. Scheme, description

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Second life... fluorescent lamps. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Lighting

Comments on the article

Those who use such lamps are well aware of their shortcomings. It seems that the light is good, and the illumination, but turn it on, and the buzz presses on your ears - this is the throttle. Yes, and they do not light up immediately, but for now the starter turns on, which, alas, is unreliable, and most importantly, these lamps also have a filament, and if it burns out, then the lamp has to be replaced with a new one.

The figure shows a circuit that allows not only to eliminate annoying shortcomings, but also to revive a lamp with a burnt out spiral.

Second life... fluorescent lamps

Let's explain the diagram. Capacitors C1, C4 must be made of paper, with an operating voltage of 1,5 times the supply voltage. Capacitors C2, C3, it is desirable to take mica. Resistor R1 is necessarily wire-wound, selected according to the power of the lamp used.

Diodes VD2, VD3 and capacitors C1, C4 are a full-wave rectifier with voltage doubling. The values of the capacitances C1, C4 determine the operating voltage of the L1 lamp (the larger the capacitance, the greater the voltage on the electrodes). At the moment of switching on, the voltage at points a and b reaches 600 V. But when it fires, it decreases and ensures normal operation.

The data of the circuit elements, depending on the power of the fluorescent lamps, are given in the table:

Second life... fluorescent lamps

See other articles Section Lighting.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

The threat of space debris to the Earth's magnetic field 01.05.2024

More and more often we hear about an increase in the amount of space debris surrounding our planet. However, it is not only active satellites and spacecraft that contribute to this problem, but also debris from old missions. The growing number of satellites launched by companies like SpaceX creates not only opportunities for the development of the Internet, but also serious threats to space security. Experts are now turning their attention to the potential implications for the Earth's magnetic field. Dr. Jonathan McDowell of the Harvard-Smithsonian Center for Astrophysics emphasizes that companies are rapidly deploying satellite constellations, and the number of satellites could grow to 100 in the next decade. The rapid development of these cosmic armadas of satellites can lead to contamination of the Earth's plasma environment with dangerous debris and a threat to the stability of the magnetosphere. Metal debris from used rockets can disrupt the ionosphere and magnetosphere. Both of these systems play a key role in protecting the atmosphere and maintaining ... >>

Solidification of bulk substances 30.04.2024

There are quite a few mysteries in the world of science, and one of them is the strange behavior of bulk materials. They may behave like a solid but suddenly turn into a flowing liquid. This phenomenon has attracted the attention of many researchers, and we may finally be getting closer to solving this mystery. Imagine sand in an hourglass. It usually flows freely, but in some cases its particles begin to get stuck, turning from a liquid to a solid. This transition has important implications for many areas, from drug production to construction. Researchers from the USA have attempted to describe this phenomenon and come closer to understanding it. In the study, the scientists conducted simulations in the laboratory using data from bags of polystyrene beads. They found that the vibrations within these sets had specific frequencies, meaning that only certain types of vibrations could travel through the material. Received ... >>

Random news from the Archive

Elephants on a treadmill 14.07.2003

Can elephants run, or do they simply walk at a fast pace if necessary? A group of Thai biologists studied the issue by running 42 Asian elephants on a treadmill.

A total of 188 races were held under the lens of television cameras. To make it possible to analyze the movements of the legs of thick-skinned giants on video frames, the joints were marked on the elephant skin with spots of white paint. The speed was recorded with a photo finish.

It turned out that elephants use something between fast walking and running. The order and mode of movement of the legs does not change, and there are no moments when all four legs leave the ground, as in typical running of other animals. On the other hand, when the elephant moves to a fast pace, the body's center of gravity begins to jump up and down, which is typical for running (when walking, the elephant's center of gravity shifts back and forth).

Many of the experimental animals reached speeds of 25 kilometers per hour, and three particularly nimble individuals exceeded it. This is the first time that such speeds have been recorded in elephants. The conclusion of zoologists: with some stretch, we can assume that elephants can run.

Other interesting news:

▪ The right of artificial intelligence to the content it creates

▪ Fine grinding for the pig

▪ Recharging through the asphalt

▪ New Benchmark MOSFETs International Rectifier

▪ Storage of information in one atom

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site for those who like to travel - tips for tourists. Article selection

▪ article To hear the difference. The art of audio

▪ article Which animal has to tear its mouth open every time to feed? Detailed answer

▪ article Help with frostbite. Health care

▪ article Turning LEDs for RA3AO transceiver. Encyclopedia of radio electronics and electrical engineering

▪ article Transistors IRL2203N - IRLR3103. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Comments on the article:

Vladimir
I put a 60 Ohm resistor out of two of 120 Ohm, 10 W each, it gets very hot on a 36 W lamp. What should be its power?

Victor
About 10 years ago, a 30W U-shaped fluorescent lamp stopped lighting up. I did not find it on sale, I collected the above scheme. Everything worked and worked until, for the sake of sports interest, I measured the consumed current, which turned out to be about 1A. Dancing with a tambourine in terms of selecting the capacitance of capacitors did not reduce the current consumption. So for every plus there is a minus, which is modestly silent.

All languages of this page

Home page | Library | Articles | Website map | Site Reviews