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Consumer electronics. Schemes, articles, descriptions

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Consumer electronics

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Laboratory power supply on the K143EN3A chip, 3-30 volts 1 ampere



Section Power supplies. My working laboratory power supply has been serving for over 20 years. Having repeatedly repaired it after extreme loads, I came to the conclusion that adjustable current protection is necessary. About 5 years ago, I developed a power supply circuit on the K142ENZA chip, and since then I forgot about repairing it. The proposed power supply circuit (PSU) can serve as a laboratory voltage source with voltage regulation limits of 3 ... 30 V, and a charger with regulation of the battery charge current (AB) ... >>

RGB LED control



Section Microcontrollers. Below is a simple circuit for driving an RGB LED or multiple LEDs. The LED is controlled by the ATMEL Attiny15L microcontroller (8 pins) ... >>

Danger of electromagnetic field and protection against its influence



Electrical section. Electric current - an ordered directed flow of electrons - is an invisible phenomenon, but you can still feel it tactilely (although it is better never to do this). But from the school physics course it is known that any conductor that conducts electric current is shrouded in electromagnetic radiation, that is, it creates an electromagnetic field around itself. The electromagnetic field of alternating current, in fact, is an ephemeral phenomenon: it cannot be seen, it is impossible to touch it. It can only be detected with highly sensitive instruments. The magnetic field is characterized by an indicator of magnetic induction, measured in tesl (Tl). Household electrical equipment is capable of generating a magnetic field, the physical value of which does not exceed millionths of a tesla, therefore, when characterizing a magnetic field, it is generally accepted to take microtesla (µT) as a unit of measurement ... >>

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Articles on consumer electronics

 


 

Home, household, hobby

Articles on devices for the home, household plots, hobbies; schemes of devices for the home, household plots, hobbies; descriptions of devices for home, household plots, hobbies: 161 articles

 


 

Calls and audio simulators

Articles on calls and audio simulators; call schemes and audio simulators; descriptions of calls and audio simulators: 79 articles

 


 

Indicators, sensors, detectors

Articles on indicators, sensors, detectors; diagrams of indicators, sensors, detectors; descriptions of indicators, sensors, detectors: 104 articles

 


 

metal detectors

Articles on metal detectors; schemes of metal detectors; descriptions of metal detectors: 124 articles

 


 

Power regulators, thermometers, heat stabilizers

Articles on power regulators, thermometers, heat stabilizers; schemes of power regulators, thermometers, heat stabilizers; descriptions of power regulators, thermometers, heat stabilizers: 136 articles

 


 

Clocks, timers, relays, load switches

Articles on clocks, timers, relays, load switches; diagrams of clocks, timers, relays, load switches; descriptions of clocks, timers, relays, load switches: 202 articles

 


 

Electric meters

Articles on electric meters; schemes of electric meters; descriptions of electric meters: 7 articles

 


 

Miscellanea

Articles on various household devices; schemes of various household devices; descriptions of various household devices: 12 articles

 


 

Latest news of science and technology, new electronics:

The speech of sperm whales is similar to that of humans 18.05.2024

In the world of the ocean, where the mysterious and unknown coexists with the studied, sperm whales, with their huge brains, are of particular interest to science. Researchers, working with a huge array of audio recordings collected during the Dominica Sperm Whale Project (DSWP) - more than 8000 recordings, seek to unravel the secrets of their communication and understand the structure and complexity of the language of these mysterious creatures. By studying in detail the recordings of 60 sperm whales in the eastern Caribbean, scientists have revealed surprising features of their communication, revealing the complexity of their language. "Our observations indicate that these whales have a highly developed combinatorial communication system, including rubato and ornaments, which indicates their ability to quickly adapt and vary during communication. Despite significant differences in evolution, sperm whales have elements in their communication that are characteristic of human communication," says Shane Gero, a biologist at Carleton University and director of the CETI project. Issl ... >>

Electron spin for quantum information transfer 18.05.2024

The transfer of quantum information remains one of the key tasks of modern science. Recent advances in the use of electron spin to expand the capabilities of information transfer in quantum systems have become very important. Researchers at Lawrence Berkeley National Laboratory are pushing the frontiers of quantum information science by experimenting with the possibilities of electron spin. Electron spin, a natural quantum bit, is a potentially powerful means for storing and transmitting information in quantum systems. Magnon wave packets, collective excitations of electron spin, have revealed their potential to transmit quantum information over significant distances. The work of Berkeley Lab researchers has revolutionized the way such excitations propagate in antiferromagnets, opening up new prospects for quantum technologies. Using pairs of laser pulses, scientists disrupted antiferromagnetic order in one place and simultaneously studied it in another, creating ... >>

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 ... >>

Random news from the Archive

stem cell management 12.02.2020

A team of microbiologists from the University of Edinburgh has done a rather interesting experiment to turn off one important mechanism in stem cells - namely, to deactivate a regulatory molecule that controls the cell's immune defense impulse when it is threatened. The results of the study, being very positive, promise to soon become the basis on which even more effective and interesting experiments will be carried out.

Unlike any other cells in the body, stem cells do not have their own defense system and cannot use an immune impulse for this protection - on the other hand, when some viruses interact, they still send this impulse, which somewhat complicates the work with stem cells, because in this way it becomes difficult to modify them in the laboratory.

That is why Scottish specialists conducted research, according to which they discovered a special protein called MAVS, which in turn triggers an activation impulse of the miR-673 regulatory molecule. And this molecule, in turn, activates the immune defense of the stem cell, preventing it from being manipulated as scientists need. After conducting several sessions of experiments and observations on embryonic stem cells belonging to mice, scientists found that the removal of this regulatory molecule leads to a significant simplification of work with the cell itself.

In other words, by deactivating this molecule, specialists can more easily manipulate cells, thus changing their structure and chemical composition much faster and easier. And this, in turn, leads to much more efficient results when remaking a stem cell into something else. However, it remains to wait for new results.

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