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Clocks, timers, relays, load switches

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Refinement of the smooth range generator



Section Civil radio communications. Mechanical part. In my opinion, the vernier mechanism of the transceiver is unsuccessful - there is no possibility of fast frequency tuning. I propose to install a vernier from the R-311 radio receiver, without changing anything in the fastening of the GPA unit itself. To do this, the diameters of the disks (3), rollers (10) and axle (16) will need to be made equal to each other, say, 24 mm. I propose, for example, to put a disk with a diameter of 16 mm on the axis (24), make the disk (3) 24 mm in diameter, and the roller (10) remains the same - 24 mm. The transfer ratio will be 1:1. Dual vernier knob for both fast and smooth transceiver tuning ... >>

Thermometer on microcontroller



Section Microcontrollers. Below is a diagram of a simple PIC thermometer. The indicator (in my case BA56-12SRWA) is used with a common anode. Temperature sensor DS18B20 (resolution 0.1'C) or DS1820 (resolution 0.5'C). The program itself will determine the type of sensor. If there is no sensor on the line, Err flashes. When the measured value is outside the measurement range, --- flashes. Measuring range -55'C to 125'C ... >>

Telephone line security



Electrical section. Heads of various organizations, entrepreneurs and other business people cannot do without a telephone. Quite often they communicate, make various decisions, and clarify emerging issues via telephone, so it is not surprising that they want to make sure that conversations are not available to outsiders. However, it should be noted that today on the market of technical means one can see many types of devices for intercepting telephone messages, both domestic and foreign manufacturers. Methods for intercepting telephone messages. There are six main listening areas on a telephone line ... >>

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Articles on 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

 


 

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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

Cleansing the blood instead of a heart transplant 08.02.2004

Progressive heart failure is usually a weakening of the heart muscle. To maintain the same volume of pumped blood, the heart enlarges painfully. In the last stages, often the only way to heal may be a heart transplant. The causes of the disease are largely unclear.

Gerd Vallukat from the Max Delbrück Center for Molecular Medicine (Berlin) believes that the deficiency may be due to the fact that antibodies to the muscle cells of the heart appear in the blood. He found such antibodies in 80 percent of the patients he studied. They attack the so-called beta-adrenergic receptors located on the surface of the muscle cells of the heart and regulate the strength and frequency of its contractions. Why some people develop these antibodies is unknown.

At the Berlin Heart Center, Vallukat's discovery is already being used in practice. Here, a method has been developed to purify the blood from dangerous antibodies. Already in a pilot experiment in eight patients, the power of the heart increased by almost 30 percent over the year, the heart shrank, its wall became more elastic.

More than a hundred patients underwent the procedure, 67 percent of them were able to help, and if we take patients under 45 years old, 88 percent were successful. For several participants in the experiment, it was possible to cancel the already scheduled heart transplant, replacing it with drug therapy. By the way, blood purification is 5-6 times cheaper than a heart transplant.

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