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Chargers, accumulators, galvanic cells. Schemes, articles, descriptions

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Chargers, batteries, galvanic cells

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Modified Antenna Birdcage

HF Antenna Section. In the 60s, the G4ZU antenna, also known as the birdcage, was popular with shortwaves. However, over time, due to the relatively small gain values ​​​​and the front-to-back radiation ratio, they forgot about it. While experimenting with different antennas, UV6AF and UA6APE modified the indicated antenna by placing it horizontally and changing the feed point. This made it possible to obtain certain advantages over the original version of the G4ZU antenna, namely: the distance between the antinodes of the current of the active element and the reflector increased, the parameters and tuning of the antenna began to correspond to the parameters and nature of the tuning of the double square, the design of the antenna became flatter, which simplified its rotation, decreased ( compared with a double square) the required number of insulating spacers - only the boom should be insulated (it can also be made of metal pipes, with dielectric inserts) ... >>

Battery recovery and charging

Section Chargers, batteries, galvanic cells. As a result of improper use of car batteries, their plates can be sulfated, and it fails. There is a known method of restoring such batteries when charging them with an asymmetric current. In this case, the ratio of the charging and discharging current was chosen as 10:1 (optimal mode). This mode allows not only to restore sulfated batteries, but also to carry out preventive treatment of serviceable ... >>

Sensors for car security systems

Electrical section. The list of the main sensors of car alarms. Vehicle roll sensor. This is a very simple sensor. Consists of two magnets and a coil. One magnet is fixed, and the second is installed in the magnetic field of the first in a suspended state. In our country, such a sensor is most common in automotive security systems. Impact sensor. Operating principle: the sensor captures the vibrations of the car body. In the event that the vibration amplitude exceeds the specified value, an alarm is triggered. Such sensors have a low cost due to their technical simplicity and are the most common in application. As a rule, they are supplied in the basic kit. One of the significant disadvantages of such sensors is their insensitivity to swing and high ability to respond to interference. ... >>

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Articles on chargers, batteries, galvanic cells

Articles on chargers, accumulators, galvanic cells; charger circuits; descriptions of chargers, batteries, galvanic cells: 272 articles



See also: Automobile. Batteries, chargers

Articles on automobile accumulators, chargers; schemes of car chargers; descriptions of car chargers, batteries: 49 articles



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Latest news of science and technology, new electronics:

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 ... >>

Electron spin for quantum information transfer 18.05.2024

The transfer of quantum information remains one of the key tasks of modern science. Recent advances in the use of electron spin to expand the capabilities of information transfer in quantum systems have become very important. Researchers at Lawrence Berkeley National Laboratory are pushing the frontiers of quantum information science by experimenting with the possibilities of electron spin. Electron spin, a natural quantum bit, is a potentially powerful means for storing and transmitting information in quantum systems. Magnon wave packets, collective excitations of electron spin, have revealed their potential to transmit quantum information over significant distances. The work of Berkeley Lab researchers has revolutionized the way such excitations propagate in antiferromagnets, opening up new prospects for quantum technologies. Using pairs of laser pulses, scientists disrupted antiferromagnetic order in one place and simultaneously studied it in another, creating ... >>

Sound-absorbing silk 17.05.2024

In a world where noise is becoming increasingly intrusive, the emergence of innovative materials that can reduce its impact is of great interest. MIT researchers have unveiled a new sound-absorbing silk fabric that promises to revolutionize quiet spaces. The Massachusetts Institute of Technology (MIT) has made significant breakthroughs in the field of sound absorption. Researchers have developed a special silk fabric that can effectively absorb sound and create cozy, quiet environments. The fabric, thinner than a human hair, contains a unique vibrating fiber that is activated when voltage is applied to it. This feature allows the fabric to be used to suppress sound waves in two different ways. The first method uses fabric vibrations to generate sound waves that cover and cancel out unwanted noise, similar to noise-canceling headphones. This p ... >>

Random news from the Archive

Ultra-compact electric vehicle iEV Z 20.02.2022

The Danish company iEV Motors has introduced a very compact electric car iEV Z, whose dimensions are 78 cm wide, 145 cm high and 198 cm long - the latter figure may vary depending on the needs of the owner. The machine weighs only 220 kg.

If the owner of the iEV Z needs to put a passenger in the passenger compartment, the drives of the electric vehicle fold out the second seat behind the driver’s seat and extend the body up to 235 cm. In addition to the passenger, luggage can also be loaded into the passenger compartment, increasing the length of the car up to 275 cm. .

You should not expect advanced technical characteristics from such an electric car: there is only one motor with a power of 1 kW (1,36 hp), which accelerates the car to 45 km / h, and a battery with a capacity of 3,3 kWh provides a cruising range of 100 km and fully charged in 3 hours. Solar panels on the roof serve as an additional power source. If local laws allow, the automaker says, this electric car can even be driven in bike lanes.

The ultra-compact iEV Z will go on sale later this year. The first 50 buyers will be able to purchase it for 5 euros. Some time later, an advanced version of the iEV Z + car will appear.

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