Starting a fluorescent lamp without a starter. Encyclopedia of radio electronics and electrical engineering

Encyclopedia of radio electronics and electrical engineering / Lighting

 Comments on the article

Widely used fluorescent lamps are not without drawbacks: during their operation, the buzz of the throttle is heard, the power system has a starter that is unreliable in operation, and most importantly, the lamp has a filament that can burn out, due to which the lamp has to be replaced with a new one.

The figure shows a circuit that allows you to eliminate the listed disadvantages. There is no familiar buzz, the lamp lights up instantly, there is no unreliable starter, and, most importantly, you can use a lamp with a burnt filament.

Capacitors C1, C4 must be paper, with an operating voltage of 1,5 times the supply voltage. Capacitors C2, C3 are desirable to be mica. Resistor R1 must be wire-wound, according to the lamp power indicated in the table.

Diodes D2, DZ and capacitors C1, C4 represent a full-wave rectifier with voltage doubling. The values ​​of capacitances C1, C4 determine the operating voltage of the lamp L1 (the larger the capacitance, the greater the voltage on the electrodes of the lamp L1). At the moment of switching on, the voltage at points a and b reaches 600 V, which is applied to the electrodes of the L1 lamp. At the moment of ignition of the lamp L1, the voltage at points a and b decreases and ensures the normal operation of the lamp L1, designed for a voltage of 220 V.

The use of diodes D1, D4 and capacitors C2, C3 increases the voltage to 900 V, which ensures reliable ignition of the lamp at the moment of switching on. Capacitors C2, C3 simultaneously contribute to the suppression of radio interference.

Lamp L1 can work without D1, D4, C2, C3, but the reliability of switching on decreases.

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

Author: Bastanov V.G.; Publication: cxem.net

See other articles Section Lighting.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

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 ... >>

Random news from the Archive Subminiature TransferJet Module 15.03.2014 Specialists of the Japanese company Toshiba have created the world's smallest wireless communication module and an antenna for it in the form of a flexible printed circuit board. These components are compatible with TransferJet short range wireless technology. The operation of TransferJet is based on the principle of a resonant transformer. The transmission speed reaches 375 Mbps. The developer expects that TransferJet technology will be widely used in mobile devices due to low power consumption, high speed and exceptional ease of use. The company believes that the growing demand for high-speed wireless communication between electronic devices will increase the demand for modules and antennas (essentially resonant transformer windings) that can be easily integrated into consumer electronics devices. The module in question measures 4,8 x 4,8 x 1,0mm and the PCB-style antenna is only 0,12mm thick. The key to miniaturization was the volumetric integration of the chip onto the module substrate and the use of molecular bonding technology. The manufacturer notes that with this, measures were taken to reduce parasitic capacitance, which could adversely affect the transmission of a signal with a spectrum of 560 MHz. Introductory module samples are already available, flexible antenna samples will appear this month.

Other interesting news:

▪ Smart lighting system for office buildings from Philips

▪ Electrons tunnel through the barrier instantly

▪ LT5522 - signal frequency transfer mixer

▪ Sony IMX661 large format CMOS image sensor

▪ Eco-friendly gasoline engine from Mazda

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Electrician's Handbook. Article selection

▪ Internet article. History of invention and production

▪ What are the specific features of England in the XNUMXth-XNUMXth centuries? Detailed answer

▪ headhunter article. Job description

▪ article Programming AVR microcontrollers in Ubuntu. Part 2. Encyclopedia of radio electronics and electrical engineering

▪ Article Adsorption. Chemical experience

Leave your comment on this article:

All languages ​​of this page

Arabic	Hebrew	Polish
Bengali	Hindi	Portuguese
Chinese	Italian	Spanish
English	Japanese	Turkish
French	Korean	Ukrainian
German	Malay	Vietnamese

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

www.diagram.com.ua
2000-2024