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DIAGRAM. Free technical library for hobbyists and professionals

Free technical library for hobbyists and professionals

As of April 20, 2024 in the database diagram.com.ua 500000 articles

Random section of the Free Technical Library:

Preamplifiers



Read interesting articles:

Transformerless preamplifier with balanced input and output, Buffer stage for line output, Tube stereo preamplifier-switcher, Microphone preamplifier, Microphone amplifier, Single-wire microphone amplifier, Hi-Fi class preamplifier, Tone preamplifier, Electronically controlled preamplifier, Application of the K548UN1 chip, Balanced line mixer, Theory: 3H preamplifiers, Line output amplifier, Pickup corrector amplifier, Electronic signal switch ... all articles of the section >>

NEWS OF SCIENCE AND TECHNOLOGY,
NEW IN ELECTRONICS

Regularly replenished compilation the most interesting news of science and technology, new electronics. Large archive of articles from 2000 to 2024. Based on materials from periodicals and the Internet.

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

Chronic lack of sleep can damage memory 19.06.2015

Scientists from the University of California at Berkeley (USA) found that lack of sleep leads to impaired conversion of short-term memory into long-term memory and contributes to the development of Alzheimer's disease.

The researchers conducted a series of experiments on 26 older people, instructing them to memorize certain words. After eight hours of sleep, the next morning, they were asked to repeat the words, using magnetic resonance imaging to record the activity of the hippocampus, which is responsible for short-term storage of memories, as well as the prefrontal cortex, responsible for long-term storage.

Using a fluorescent dye analogue, which is the only way to visualize accumulations of amyloid proteins in the human brain, the scientists found that those who showed deeper sleep and better memory had a minimum of beta-amyloids in the prefrontal cortex of the brain.

In subjects who memorized words worse and slept less deeply, beta-amyloids in the cortex turned out to be significantly higher than normal. Thus, scientists concluded that there is a definite relationship between poor sleep and the accumulation of beta-amyloids.

Obviously, a high concentration of beta-amyloids in the prefrontal cortex prevents the brain from entering the deep sleep phase, which contributes to the further accumulation of beta-amyloids. In addition, beta-amyloids interfere with the transfer of short-term memories from the hippocampus to long-term memory in the prefrontal cortex.

Now scientists are going to conduct a series of experiments to find out which of these two factors comes into play first: beta-amyloids undermine healthy sleep and contribute to the development of Alzheimer's disease, or lack of sleep leads to the accumulation of beta-amyloids with all the negative consequences.

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FREE ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING

Encyclopedia of radio electronics and electrical engineering. Articles with diagrams, illustrations, comments

In section Encyclopedia of radio electronics and electrical engineering presents the most interesting electronic designs, diagrams, descriptions, reference materials with illustrations and explanations.

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ENCYCLOPEDIA OF RADIO ELECTRONICS.
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AT LEISURE

Effective means for relaxation and good mood

A random story from the life of a radio amateur:

It was about 13 years ago. I decided to solder a garland, well, like, for a Christmas tree. I bought 12,5 V bulbs in the store, having previously calculated everything, how much is needed, so that 220 V is evenly distributed over the garland. There were no cartridges for light bulbs, I soldered the wires to the base. I soldered all the light bulbs, screwed the plug (do not think that the one they eat). Proud of myself, I stick it into 220 V - then BABAH and BEAUTIFUL SALUTE from already painted cans of light bulbs ... For those who did not understand: I connected the lamps in parallel and each of them had a voltage of 220 V, but it was necessary in series, then it would work fine.
Other stories from the life of radio amateurs | Random fun story

Random fun puzzle:

The girl could not sleep at night. She twisted and turned, but nothing could help. Suddenly she picked up the phone and called somewhere. And after that she was able to sleep peacefully. Why exactly after the call she could fall asleep?

Response

Other fun puzzles | Random fun puzzle

Random Question Quiz Online:

Which chips have a picture of a man with a big mustache, split bangs and a red bow tie on their packages?

A: "Lay's"
B: "Pringles"
C: "Hostes"
D: "Doritos"

Response

Other Quiz Questions | Random five questions

Random aphorism:

"Пока женщина не полюбила, она кокетничает" (Оноре де Бальзак)
Other aphorisms | Random aphorism

Random proverb:

One bracelet never rings. Creole proverb
Other proverbs of the peoples of the world | Random proverb

Random phraseological unit:

Shelving
(Дать делу длительную отсрочку, надолго задержать его решение)
1. Perhaps this expression originated in Muscovite Russia, three hundred years ago. Tsar Alexei, father of Peter I, ordered in the village of Kolomenskoye in front of his palace to install a long box where anyone could drop their complaint. Complaints fell, but it was very difficult to wait for a decision: months and years passed. The people renamed this "long" box to "long". It is possible that the expression, if not born, was fixed in speech later, in "presences" - institutions of the 2th century. The then officials, accepting various petitions, complaints and petitions, undoubtedly sorted them, laying them out in different boxes. "Long" could be called the one where the most unhurried things were put off. It is clear that the petitioners were afraid of such a box, XNUMX) the most insignificant and unhurried petitions and complaints were put aside in the long drawer of the desk in Russian offices. Perhaps this is a tracing paper from the German language: etwas in die lange Truhe legen
Other phraseological units | Random phraseological unit

Random phrase in Latin:

Apparatus criticus. - Подготовления для исследовательской работы.
Other phrases in Latin | Random phrase in Latin

Random fact "Did you know?":

There are 31 species of sharks in the Baltic Sea, mostly small ones. However, in the region of the Danish straits, you can also meet a giant shark up to 10 meters long, feeding on plankton.
Other Facts "Did You Know?" | Random interesting fact

Random article of the Great Encyclopedia for Children and Adults:

Why did the ancient Romans always abbreviate names when writing names?

The Romans had few personal names - about 70, of which about 20 were actually used. In the record, they were reduced to 1-3 letters. For example, the name Publius was abbreviated to P., since there were no other common names for this letter, and everyone understood what was meant.

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