Network indicator. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Miscellaneous electrical devices
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Neon bulbs are often used to indicate the presence of mains voltage in various devices. However, they gradually become scarce, and to accommodate them in home-made structures, large holes have to be made in the cases.
I propose to use an LED with ballast elements C1, R2 to indicate the network. Resistor R1 serves to discharge the capacitor when the network is off.
Such an indicator can be installed in an apartment switch, improving its usability, since now the switch is easy to find in the dark.
Author: P. Bobonich, Uzhhorod, Ukraine
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Latest news of science and technology, new electronics:
Machine for thinning flowers in gardens
02.05.2024
In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers.
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Advanced Infrared Microscope
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Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>
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| Random news from the Archive Found a substance that restores damaged muscles
09.08.2016
Researchers from Johns Hopkins University have found a protein that stimulates the growth of damaged muscle tissue. With its help, it will be possible to treat slowly healing injuries of the elderly.
American biologists have discovered the protein beta-1-integrin, which is found on the surface of stem cells and serves them so that the cell can "feel" where it is. The presence of integrin causes undecided stem cells to develop like muscle tissue cells. Protein can make up to 50% of a degenerated muscle recover.
The existence of the protein was known before, but its role in the cell was unclear. Beta-1-integrin - one of 28 varieties of integrin - supports the connection between the stem cell and its environment, and also interacts with fibroblast growth factor, enhancing and directing the growth and renewal of tissues. Aging stem cells lose integrin and do not respond to growth factor; however, with the introduction of protein, even the cells of old mice were restored quite successfully.
Scientists believe that integrin could be used to create drugs that promote muscle healing in older people suffering from the consequences of injuries and degenerative diseases, as well as treat pressure sores and other manifestations of muscle atrophy.
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