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LEDs. Schemes, articles, descriptions

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Solar collector. Solar water heating plant



Section Alternative energy sources. Obtaining hot water that can be used in hot water supply and heating systems, as well as for various technological needs. The collector absorber is made of 152 mm wide aluminum profiles with a selective coating. The coolant flows through copper tubes pressed into an aluminum profile on the reverse side. The absorber is installed inside a shell made of two-layer cellular polycarbonate with a transverse arrangement of channels, which ensures the suppression of convection in the space between the outer and inner walls of the shell. The internal volume of the collector is sealed with covers installed at its ends ... >>

Classification of compact fluorescent lamps



Section Fluorescent lamps. Compact fluorescent lamps are divided into three subgroups: subgroup 1 - two-pin (pin), having a starter with a capacitor built into a special base G23 and designed to work with an external electromagnetic control gear, subgroup 2 - four-pin (pin) universal, working in conjunction with an external electronic or electromagnetic ballast, subgroup 3 - compact fluorescent lamps with an electronic ballast (electronic ballast) integrated (built-in) in the base. They have a standard E27 (or E14) threaded base ... >>

History of electrification



Electrical section. The first argument about the dangers of electricity in the competition for the market for this very electricity was used by Thomas Alva Edison, who invented and designed the incandescent lamp, lamp bases and sockets, sockets, switches, junction boxes, fuses and knife switches. He decided to electrify New York with a single station instead of installing mechanically driven dynamos in every home. As an experiment, the central station was first built for one small area of ​​the city: it provided a direct current of 200 V for thousands of light bulbs, provided energy for dozens of passenger elevators, hundreds of lifts in houses ... >>

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Articles on LEDs

Articles on LEDs; LED descriptions: 91 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

Ultrabook Toshiba dynabook V632 has 13 hours battery life 18.03.2013

Toshiba has announced the imminent start of sales in the home market of the new ultrabook dynabook V632. The novelty will go on store shelves starting March 20 and will cost about $1460. Perhaps the most important feature of the novelty is a long battery life: according to official data, the device can work without being connected to the mains for 13 hours. True, at the same time, the characteristics of the battery are not reported, it is only known that the battery is of the lithium-polymer type.

The equipment of the dynabook V632 is typical for the latest generation of ultrabooks: it is based on a motherboard based on the Intel HM76 Express chipset, and the processor uses a dual-core Intel Core i5-3337U, operating at a frequency of 1,8-2,7 GHz and supporting Hyper-threading technology. threading. The standard amount of DDR3-1600 MHz RAM is 8 GB. For data storage, a 128 GB solid-state drive is used, and the ultrabook display is characterized by a diagonal of 13,3 inches and a resolution of 1366 x 768 pixels.

In addition to the above components, the configuration of the device includes Wi-Fi 802.11b / g / n and Bluetooth 4.0 communication modules, a 920 thousand-pixel webcam, a Harman Kardon speaker system, an SD card reader, three USB 3.0 ports and HDMI video output.

According to the manufacturer, the body of the dynabook V632 is made of magnesium alloy and is additionally reinforced, and the laptop keyboard is backlit.

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