Regulators of current, voltage, power. Schemes, articles of the Free Technical Library

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Regulators of current, voltage, power. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Regulators of current, voltage, power

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Circuits for KB antenna

Antenna section. Measurements, setup and matching. Among Soviet and foreign shortwaves, the W3DZZ dipole antenna is quite widespread, which works well for reception and transmission, is quite simple to manufacture and is in good agreement with the widespread 75-ohm cables RK-1 and RK-3. On the bands (14,21 and 28 MHz), the antenna has a complex radiation pattern, which allows you to work with almost equal success in any direction. A diagram of such an antenna with an indication of the dimensions is shown in fig. 1 ... >>

Super Regenerative 80-125 MHz Receiver

Section Radio reception. This device can receive AM and FM signals. Insufficient elimination of the regenerated frequency by the output filter interferes only with a high level of gain by the output stage ... >>

Relay voltage stabilizer, 15-22/5 volts 10 amps

Section Voltage stabilizers. This stabilizer (Fig. 5.30) is designed to power digital devices. ICs that do not impose high requirements on the stability and level of output voltage ripple. The voltage stabilizer is equipped with protection against overcurrent and short circuits. The printed circuit board of the stabilizer is shown in fig. 5.31. To obtain such a load current, a composite inclusion of several transistors was used, for better matching of which additional bias voltages are used, taken from rectifiers on diodes VD2, VD3. Resistor R4 is made of thick high-resistance wire wound on a ceramic case from a blown fuse. ... >>

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Articles on current, voltage, power regulators

Articles on regulators of current, voltage, power; circuits of current, voltage, power regulators; descriptions of current, voltage, power regulators: 93 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

Water found on distant planets 06.12.2013

The Hubble Space Telescope has detected faint traces of water in the atmospheres of five exoplanets. This gives hope that we will be able to find a copy of the Earth in the depths of space, perhaps even habitable.

Scientists have previously reported the presence of water in the atmospheres of several exoplanets, but the current study, led by L. Drake Deming of the University of Maryland at College Park, is the first to accurately measure and compare the water vapor signatures of multiple worlds. .

Water has been found on five exoplanets: WASP-17b (1000 light years from Earth), HD209458b (150 light years), WASP-12b (871 light years), WASP-19b (815 light years) and XO-1b (560 light years) . The water signatures on these planets are varied, with WASP-17b appearing to have a thick, dense atmosphere, while HD209458b has the most water in its atmosphere. The planets are at a great distance from the Earth, so the discovery of water in their atmosphere is a great achievement.

To detect water, scientists used the Hubble Space Telescope's wide-angle camera to study the absorption of light by the planet's atmosphere. Observations were made in the infrared wavelength range, where it is easiest to detect the signature of water. The characteristics of the signatures, according to scientists, give confidence that there really is water in the atmospheres of 5 exoplanets.

The water signatures were weaker than expected, and scientists suspect that the reason for this is the layer of fog or dust "blanket" that envelops each of the five planets. This fog can reduce the intensity of all signals from the atmosphere, but at the same time it changes the characteristics of the signature of water and provides additional information about the atmosphere of a distant planet.

Unfortunately, all five exoplanets, in the atmosphere of which water vapor was found, are probably uninhabited - these are hot Jupiters, large hot planets where life could hardly have appeared and survived. However, the current study, along with other Hubble observations, suggests that cloudy or hazy atmospheres may be fairly common among hot giant planets. In addition, scientists are improving methods for studying the atmospheres of distant planets, and with the advent of new optical instruments, similar studies of smaller planets, including those similar in mass to the Earth, located in the habitable zone, will become possible.

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