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Lightning protection. Schemes, articles, descriptions

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Lightning protection

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Electric stimulator for fish

Section House, gardening, hobby. Many different schemes, the so-called electronic fishing rods, are common among radio amateurs. Such schemes, as a rule, consist of a generator and an electronic key. Due to the incorrect operation of the electronic key, most of the rods are just a source of high voltage, and therefore not harmless to fish, especially to small things that remain behind the net. Such devices, in addition to having a detrimental effect on fish, are ineffective, have low efficiency due to the continuously operating converter and improper operation of the electronic key. ... >>

Charger on PIC12F675 microcontroller

Section Chargers, batteries, galvanic cells. This charger (charger) automates the process of charging batteries. If the battery is not discharged to a voltage of 1 V, it will discharge it to this voltage and only then will charging begin. At the end of it, the charger will check the battery's performance and, if it is faulty, will give an appropriate signal. The proposed charger is designed for simultaneous independent charging of three Ni-Cd or Ni-Mh batteries of size AA or AAA with a current of 0,23 A. It was developed on the basis of a similar design described in [1]. In order to simplify, it uses a microcontroller with a built-in analog-to-digital converter ... >>

Power regulators on a thyristor-transistor generator

Section Regulators of current, voltage, power. With the advent of thyristors, a convenient opportunity appeared to regulate the power of the load operating from alternating voltage. Many different schemes have been invented for controlling thyristor switches that switch the load. For example, in the power regulator circuit in Fig. 1, a power triac is controlled by a thyristor-transistor key generator, discussed in previous articles [1, 2]. The device allows, with careful selection of capacitors C1 and C2, to achieve smooth adjustment of the load power Rh using R6 ... >>

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Articles on lightning protection

Articles on lightning protection; descriptions of lightning protection devices: 8 articles



All articles for an electrician

Regulatory documentation for an electrician



Latest news of science and technology, new electronics:

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 ... >>

High Energy Density Capacitor 17.05.2024

Energy plays a key role in many aspects of modern life, and the ever-increasing demand for efficient and fast-charging power sources is driving innovation. Researchers at the McKelvey School of Engineering at Washington University in St. Louis have taken a significant step forward with a high-energy-density capacitor that promises to revolutionize the world of energy. A team of scientists from the McKelvey School of Engineering at Washington University in St. Louis presented the results of their latest research on heterogeneous thin-film structures for capacitors. Researchers, working with ferroelectrics, inadvertently created a capacitor with an amazing energy density that is 19 times higher than that of conventional elements. This breakthrough opens up new prospects for the development of fast-charging batteries, which are so necessary in the modern world. Capacitors play a key role in various devices, providing stable ... >>

Causes of conflicts between brothers and sisters 16.05.2024

Family relationships are often complex and multi-layered, and conflicts between siblings are no exception. Research in this area can help us understand what factors underlie these conflicts and why they occur so frequently. Let's look at some of the findings from psychologists at Arizona State University. American psychologists from Arizona State University conducted a study aimed at identifying the causes of conflicts between brothers and sisters. They found that different forms of violence, whether physical or verbal, did not depend on the gender of the siblings. This means that both girls and boys can exhibit aggressive behavior towards their loved ones. Other studies have shown that conflict between siblings often persists into adulthood, even as contact decreases. This indicates that people often follow established patterns of behavior formed in childhood. It was also found that, despite ... >>

Random news from the Archive

Birds can see magnetic fields 05.09.2018

Scientists have put forward an unexpected hypothesis that explains why birds do not go astray during migrations. Perhaps they have the ability to see the Earth's magnetic fields.

Ornithologists have concluded that birds provide supervision with a special protein. The protein is called Cry4 and belongs to the class of cryptochromes, which are responsible for the ability to recognize blue and ultraviolet colors and affect the regulation of circadian rhythms. They are found not only in animals and birds, but also in plants.

Swedish scientists from Lund University have found that this protein may be associated with the ability to feel and see the planet's magnetic field.

The scientists also found that migratory birds have much more of this protein than those who live in the same region all year round.

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