Fluorescent lamps. Schemes, articles of the Free Technical Library

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Fluorescent lamps. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Fluorescent lamps

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plumbing antenna

HF Antenna Section. In a modern city apartment, using a radio, especially a good one, is almost impossible due to the huge level of interference from a variety of electrical equipment, especially electric vehicles. Nevertheless, I managed to make an antenna with which listening to the receiver began to be a pleasure. This was achieved with the help of a design based on a central heating pipe or water supply. This use of these pipes has already been written on the pages of magazines more than once, but, surprisingly, the idea has never been worked out to the end, and as a result either the effect was incomplete or the idea was emasculated altogether. ... >>

Voltage polarity converter, 15 volts 0,1 amps

Section Voltage converters, rectifiers, inverters. It is known that it is possible to fully realize the capabilities of operational amplifiers only when they are powered from a bipolar source. However, more often than not, only a unipolar source is available in the home laboratory of a radio amateur. To power devices with a relatively small number of op amps (consuming current up to 100 mA), you can use a converter that allows you to generate a bipolar voltage. The converter (Fig. 4.27) consists of a rectangular pulse generator made on the elements DD1.1, DD1.2, a shaper on inverters DD1.3 ... DD1.6 connected in parallel (to increase the load capacity of the generator) and four switches: two - on transistors VT1, VT2 and VT3, VT4 and two - on diodes VD2, VD3 and VD4, VD5 ... >>

DIY oLED LEDs

Section Ham Radio Technologies. What is an organic LED? Organic Light-Emitting Diode (oLED) - an organic light-emitting diode, made from organic compounds capable of emitting light when a current is passed. In this article, we will look at the manufacture of organic oLEDs in a home laboratory with our own hands. ... >>

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Articles on fluorescent lamps

Articles on fluorescent lamps; descriptions of fluorescent lamps: 50 articles

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Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

The benefits of sex for athletes 20.10.2016

Laura Stefani from the University of Florence (Italy) and her colleagues analyzed and summarized data from scientific publications on the impact of the sexual life of athletes on their performance. They came to the conclusion that the prejudice that sex before the start is harmful is nothing more than a ridiculous myth.

The notion that sexual intimacy before a competition negatively affects athletes has existed since ancient times. Back in the XNUMXst century AD. the ancient Roman physician and philosopher Areteus of Cappadocia wrote that male power can weaken, transforming into a seed. Even earlier, the Greek philosopher Plato condemned the Olympians who practiced intimacy on the eve of the competition.

Nowadays, such an opinion exists, for example, among football coaches, and fans of the film about Rocky remember his mentor's warnings that "women make legs weak."

Scientists have analyzed more than 500 different scientific publications relating to the relationship of sex with physical activity. Surprisingly, there are practically no works dealing with this problem in detail. Of the nine studies that have been published over the past 60 years, researchers have found that none address this question systematically.

The researchers concluded that sex the night before a competition may even have a positive effect on athletic performance.

"In general, there is an overall positive effect of sex the night before a competition on an athlete's performance, especially from a psychological point of view. Sex has a relaxing effect that can help reduce stress, increase endurance (important for marathon runners) or concentration (when shooting)" , the authors write.

However, the researchers caution that the available material is somewhat ad hoc and there is still no reliable data on the correlation between sex and fitness.

Scientists talk about the positive impact of sex at least ten hours before the start, provided that the athlete does not smoke or drink alcohol.

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