A simple power supply, 5 volts 0,5 amps. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Power Supplies
Comments on the article
The power supply (Fig. 1.25) is designed to supply a stabilized voltage of +5 V to various digital devices with a current consumption of up to 0,5 A. The T1 transformer was used home-made, made on the SHL20x32 magnetic circuit. Winding I contains 1650 turns of PEV-1-0,1 wire, winding II - 55 turns of PEV-1-0,47.
In general, for the power supply, you can use a suitable ready-made transformer with a power of more than 7 W, which provides an alternating voltage of 8 ... 10 V at a current of at least 500 mA on winding II.
The regulating transistor VT1 is mounted on an L-shaped duralumin plate measuring 50x50 and 2 mm thick, which acts as a heat sink.
The base and emitter leads are passed through the holes in the board and soldered to the corresponding printed conductors. The contact of the collector with the printed conductor is made through the radiator of the transistor, fixing screws with nuts and a duralumin plate.
Author: Semyan A.P.
See other articles Section Power Supplies.
Read and write useful comments on this article.
<< Back
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.
... >>
Advanced Infrared Microscope
02.05.2024
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. ... >>
Air trap for insects
01.05.2024
Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>
| Random news from the Archive All Optical Switch
26.09.2012
Computers are getting faster every year, but any advances in speed will be negligible if their ones and zeros are transmitted by flashes of light rather than electricity.
Researchers at the University of Pennsylvania have taken an important step forward in the field of photonics. They created the world's first all-optical photonic switch from nanowires made from cadmium sulfide. In addition, they combined these photonic switches into a logic gate - the basic element of a digital circuit capable of performing elementary logic operations, on the basis of which computer chips are designed. These studies were conducted by Assistant Professor Ritesh Agarwal and PhD student Brian Pizzione in the Department of Materials Science and Engineering at the Penn School of Engineering and Applied Sciences. Also contributing to this work in the field of materials science are Chan-Hee Cho and Lambert van Vogt. The results were published in the journal Nature Nanotechnology.
The research team's innovation builds on earlier research showing that cadmium sulfide nanowires represent an extremely strong bond between light and matter. This makes them particularly effective materials for controlling light. This quality is crucial for the development of nano-photonic circuits, since the existing mechanisms for regulating the flow of light are cumbersome and require more energy than their electronic counterparts.
“The biggest challenge for photonic structures at the nanoscale is to take in the flow of light, do something with it, and then let it out,” Agarwal said. “Our main innovation is how we solved the first problem. the nanowires themselves on the chip became light sources."
The research team started with a precise cut of the nanowire. Then they sent a laser pulse to its first segment, receiving a miniature radiation source at the end of it in front of the second segment. Since both segments were made from a single nanowire and their ends exactly matched, the second segment effectively absorbed this radiation and directed the light further. Having received light in the second segment of the nanowire, the researchers extinguished it with an additional pulse from the side. Thus, an elementary logical switch has turned out. The scientists measured the intensity of the light coming out of the end of the second segment of the nanowire and found that the switch could effectively represent the binary states used in logic devices.
"By combining several of these switches, you can design logic elements and assemble logic gates," said Brian Pizzione. "We used these switches to build a NAND gate, the main building block of a modern computer chip."
|
Other interesting news:
▪ Spiders eat more meat than humans
▪ MATSUSHITA completely switched to lead-free boards
▪ The thinnest X-ray detector
▪ Found the reason for fluctuations in the brightness of the Sun
▪ Men spread negative information less often than women
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ section of the Garland website. Article selection
▪ article Electromagnetic fields and their impact on humans. Basics of safe life
▪ Article How does our diet affect us? Detailed answer
▪ article Kayak on ice and on rails. Personal transport
▪ article Installation of grounding conductors. Encyclopedia of radio electronics and electrical engineering
▪ article Kyrgyz proverbs and sayings. Large selection
Leave your comment on this article:
All languages of this page
Home page | Library | Articles | Website map | Site Reviews
www.diagram.com.ua
2000-2024
Arabic
Bengali
Chinese
English
French
German
Hebrew
Hindi
Italian
Japanese
Korean
Malay
Polish
Portuguese
Spanish
Turkish
Ukrainian
Vietnamese