Electrical materials. Schemes, articles of the Free Technical Library

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Electrical materials. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Electrical materials

We recommend reading in our Free Technical Library:

The principle of operation and characteristics of photoelectric converters

Section Alternative energy sources. The sun is an important renewable and environmentally friendly source of energy. Solar energy can be converted into electricity using photovoltaic (solar) batteries. Such batteries are used in spacecraft, in radio beacons and ocean navigation buoys, in autonomous communications networks, as well as in calculators and electronic toys. The photoelectric (or photovoltaic) method of converting solar energy into electrical energy is currently the most developed in scientific and practical terms. For the first time, the prospect of its use in large-scale energy was noticed back in the 30s by one of the founders of the Soviet physics school, Academician A.F. Ioffe. However, at that time the efficiency of solar cells did not exceed 1%. In subsequent decades, thanks to a significant amount of research in the field of physics and technology, this figure increased to 20-25% ... >>

Turning on the light bulb with two switches

Section Lighting. This circuit is designed to turn off the lighting using two switches remote from each other. The light is on when only one of the switches is closed. If both switches are closed or open, then the light is off. According to the same algorithm, circuits work, the basis of which is the logical element EXCLUSIVE OR ... >>

Overview of extraordinary cooling systems and original computer peripherals

Section Electronics and computer. Despite all the innovations of computer manufacturers, the situation with the cooling of components inside the case remains tense. Even the ubiquitous distribution of the ATX form factor, designed, in particular, to increase the efficiency of air exchange inside the system unit, did not bring the expected results. But can you keep up with the manufacturers of components? One hard drive Seagate Cheetah (10 thousand revolutions per minute) is able to heat the air around it up to 60 degrees Celsius. The processors of three-dimensional accelerators and other devices are not less heating abilities. It is no coincidence that on the main chip of many modern graphics cards you can find passive cooling elements (radiators). But this does not always save the situation. Exceeding the permissible temperature inside the case is fraught with unstable system behavior, freezes caused, in particular, by changes in the basic properties of semiconductors, which is very critical for entry-level servers, workstations and graphics stations ... >>

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Articles on electrical materials

Articles on electrotechnical materials; descriptions of electrical materials: 61 articles

All articles for an electrician

Regulatory documentation for an electrician

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

XNUMX volt mono amplifiers 18.01.2008

National Semiconductor offers two new 200V ICs, the LME49811 and LME49830 mono amplifiers, which can be used in the output stages of audio power amplifiers.

Devices have an extremely low level of distortion (THD + N) - no more than 0,00035% for LME49811 and 0,0006% for LME49830, save space on the board, because they allow you to abandon 25 external components, are available in 15-pin TO-247 packages , develop a power of 8 watts at an 500-ohm load.

The LME49811 provides 40 V/µs slew rate, 115 dB PSRR, 9 mA output, 100 µV output noise, is powered by a +20 to +100 V bipolar supply. The LME49830 has a slew rate of 40 V/μs, PSRR 115 dB, noise level 42 μV, output current 60 mA, supply voltage from +20 to +100 V.

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