Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library

Various electrical devices. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Miscellaneous electrical devices

We recommend reading in our Free Technical Library:

How and which wind turbine to choose

Section Alternative energy sources. When looking for a wind turbine or other source of alternative energy, questions often arise. Which wind generator is suitable? and why is it so expensive? This article will make the choice easier and possibly help you save money, as well as explain why you most likely do not need a powerful and expensive wind turbine. Any complex that includes an alternative energy source consists of three main blocks: a source, an accumulator and an exhaust valve. In our case, a wind generator, batteries and an inverter ... >>

Voltage converter, 12/220 volts 100 watts

Section Voltage converters, rectifiers, inverters. On fig. 4.34 shows a diagram of a voltage converter 12 V DC to 220 V AC. The proposed version of the converter can be used to power the radio, television receiver and other electronic devices with a power of up to 100 watts. The converter consists of a master oscillator made according to the scheme of a symmetrical multivibrator based on transistors VT1, VT2 and a power amplifier based on transistors VT3...VT8. It works like this. When power is supplied by the SA1 switch, the multivibrator starts generating symmetrical pulses (meander). From the collectors of the multivibrator transistors, the pulses through the chains R5, C3 and R6, C4 are fed to the transistors of the push-pull power amplifier ... >>

Dual Object Digital Thermometer

Section Power regulators, thermometers, heat stabilizers. To measure the air temperature in the room and outside it, as a rule, two different thermometers are used, although it would be quite possible to get by with one having two temperature sensors. Such a device will be discussed. The device is based on K1019EM1 integrated temperature sensors and KR572PV5 double-integration ADC. The thermometer (Fig. 1) allows you to alternately measure the temperature of two different objects, and the signals from the temperature sensors can be switched both manually and automatically. One of the sensors is located directly on the device board, the other is remote ... >>

To any article in this section and all Encyclopedias you can leave your comment.

Articles on various electrical devices

Articles on various electrical devices; diagrams of various electrical devices; descriptions of various electrical devices: 37 articles



All articles on power supply



Latest news of science and technology, new electronics:

Blinking of the magician and his audience 19.05.2024

Magic and illusions have always captured the attention of the public, but what happens behind the scenes of the magician and in the brains of his audience? Scientists from the UK decided to solve this mystery by conducting a new study involving ten illusionists of varying experience. Illusionists, some of whom had been practicing magic for more than half a century, others for only six months, were invited to demonstrate the same trick - the popular coin trick. Recordings of their performances during training and on stage showed that each of them began to blink significantly more often at the moment of performing the trick. The study's findings indicate that magicians' blink rate may be related to unconscious aspects of their performance. At the same time, as scientists have found, spectators also begin to blink more often, following the movements of the illusionist. This observation supports the idea that magicians may be catalysts for blinking in audiences. Additional research has shown that magicians blink more often during ... >>

Ultrasonic coffee machine 19.05.2024

Iced coffee has become an integral part of coffee culture in recent years. Therefore, engineers from the University of New South Wales decided to improve its preparation. They have developed an ultrasonic coffee machine that reduces the cold brew time for ground coffee beans from 12-24 hours to significantly less time. Iced coffee, or "Cold brew", is popular due to its smoothness, low acidity and low bitterness. It is prepared by steeping ground coffee in cold water for a long time. Unlike traditional hot brewing, which often imparts bitterness to coffee, cold brewing extracts more delicate and complex flavors from the coffee beans. The innovative system, presented by a team of engineers, introduces ultrasonic technology into the coffee preparation process. The system uses ultrasonic waves to speed up the process of extracting oils, flavor and aroma from ground coffee. This allows you to significantly reduce the time ... >>

The speech of sperm whales is similar to that of humans 18.05.2024

In the world of the ocean, where the mysterious and unknown coexists with the studied, sperm whales, with their huge brains, are of particular interest to science. Researchers, working with a huge array of audio recordings collected during the Dominica Sperm Whale Project (DSWP) - more than 8000 recordings, seek to unravel the secrets of their communication and understand the structure and complexity of the language of these mysterious creatures. By studying in detail the recordings of 60 sperm whales in the eastern Caribbean, scientists have revealed surprising features of their communication, revealing the complexity of their language. "Our observations indicate that these whales have a highly developed combinatorial communication system, including rubato and ornaments, which indicates their ability to quickly adapt and vary during communication. Despite significant differences in evolution, sperm whales have elements in their communication that are characteristic of human communication," says Shane Gero, a biologist at Carleton University and director of the CETI project. Issl ... >>

Random news from the Archive

Loneliness is dangerous 23.05.2023

Scientists at Harvard University have found a way to preserve longevity. Turns out it's all about social relationships.

The results of the study proved that frequent and active communication in the long run helps to improve health and prolong life. Social preparation helps to counter the effects of chronic stress.

Harvard Medical School psychiatrist and psychoanalyst Robert Woldinger believes that the formula for health and happiness depends largely on positive relationships with other people.

If you regularly feel lonely and isolated from other people, Waldinger warned, it could be as dangerous as becoming obese or smoking half a pack of cigarettes a day. Abandoned social skills can atrophy like unused muscles.

Scientists do not give any clear recommendations. They only remind you that the point here is not the number of friends or acquaintances, but how fully you communicate with them. Even if you have a few close friends with whom you communicate daily, it can be a real medicine and have a positive effect on life expectancy.

But scientists recommend avoiding isolation. They believe that it is important to be more active in going out. After all, social life can also increase mental well-being. And here scientists include even communication with neighbors or sellers in the store.

Other interesting news:

▪ World's smallest IrDA (FIR) module

▪ rare earth piglets

▪ Touch screens will become cheaper

▪ Huge atmospheric waves are to blame for weather disasters

▪ Flight over the volcano

News feed of science and technology, new electronics


Interesting materials of the Free Technical Library:

▪ section of the site Electrical safety, fire safety. Article selection

▪ article Manufacture of caterpillars. Tips for a modeller

▪ article What is a mammoth? Detailed answer

▪ Lemon article. Legends, cultivation, methods of application

▪ article Device for protecting household appliances from mains voltage fluctuations. Encyclopedia of radio electronics and electrical engineering

▪ article The appearance of the card in the desired pile. Focus secret

All languages ​​of this page

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