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Electrician's Handbook. Schemes, articles, descriptions

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Electrician's Handbook

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Antenna triple square from one piece of wire

Section Television antennas. This antenna has a high gain and can be used both indoors and outdoors. It is characterized by ease of manufacture, availability of materials, small size, and aesthetic appearance. The antenna design is shown in the figure, the dimensions are in the table. The three-frame antenna described in the book by Nikitin V.A. How to get good TV performance is taken as a basis ... >>

USB thermometer on microcontroller

Section Microcontrollers. The ATmega8 was chosen as the microcontroller. Digital temperature sensor: DS18B20, which has temperature measurement limits from -55 to +125 degrees Celsius ... >>

Quartz Super Oscillator (Super VXO)

Section Nodes of amateur radio equipment. Generators, heterodynes. The proposed supergenerator differs from conventional quartz oscillators by using, instead of one, two identical quartz resonators connected in parallel. This inclusion allows the generator frequency to be adjusted within much larger limits than single-quartz circuits. So, according to my experiments, for resonators with a frequency of 10,15 MHz this range is about 40 kHz, and for 13 MHz quartz it is about 90 kHz (!) ... >>

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Articles with reference materials for an electrician

Articles with reference materials for an electrician; descriptions with reference materials for an electrician: 76 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

Sedentary work strengthens mental abilities 14.07.2020

People who have worked in a sedentary job all their lives are at a lower risk of cognitive impairment in old age. This conclusion was made by scientists from the University of Cambridge.

Experts analyzed the lifestyle of 8500 people aged 40 to 79 years. All of them had a different education and a wide circle of friends. Participants filled out questionnaires about their health, lifestyle and hobbies. Volunteers were examined, scientists studied their physical activity at work and after it.

The experiment was long-term - after 12 years, the researchers again studied the condition of the participants and did a series of tests to understand how their cognitive abilities had changed: memory, attentiveness, reading speed and information processing.

People who worked in the office throughout the study period showed the best test results - there were 10%. Those who were engaged only in manual labor worsened their performance by almost three times.

Scientists note that despite the results of the study, physical activity is important for health. A sedentary lifestyle will only keep your cognitive abilities in old age if it doesn't kill you sooner.

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