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Radio amateur designer. Schemes, articles, descriptions

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Radio amateur designer

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Transceiver YES-97 (GPA and PIP)

Section Civil radio communications. Having previously considered the main components of the YES-97 transceiver, we seem to have left one of its most important components, the GPA, overboard. Therefore, in an effort to correct this oversight, we present its schematic diagram and a brief description of the work. I especially want to emphasize that the transceiver's GPA is universal, the output parameters are stored in a wide range of generated frequencies, and it can certainly be used in similar amateur radio designs. In this case, frequency overlaps by ranges are determined and set independently, RW3AY.GPA - smooth range generator ... >>

IR remote control command receiver with USB interface

Section Infrared technology. Radio amateurs, who repeated the design of A. Zotov [1], were convinced how convenient it is, without going to the computer, to perform simple, but sometimes very necessary operations on it. The interaction of the command receiver with the computer took place through the COM port, which imposed some restrictions on other devices connected to the same port. Indeed, in modern computers, manufacturers leave only one COM port connector, and in the future, most likely, it will be completely removed. It was replaced by a more versatile and faster USB interface. Finding a free USB connector is not difficult; there are a lot of them on a modern computer. In addition, devices equipped with this interface can work without causing mutual interference. ... >>

First aid for electric shock. Indirect (closed) heart massage

Electrical section. Massage techniques were developed in the laboratory of experimental physiology for the revitalization of the body of the former USSR Academy of Medical Sciences. Heart massage is performed as follows. The chest of the victim is freed from clothing, laid on his back on a solid base. For better blood flow to the heart, the victim's legs should be raised by about 0,5 m. It is very important to determine the place of pressure. To do this, the lower end of the sternum is probed and a pressure point is found 3-4 cm above this place. The assisting person descends to the side of the victim, finds a pressure point and puts his palm on it so that the fingers do not touch the chest. The tone of the chest muscles in the victim is sharply reduced, so the effort of one hand is not enough to massage the heart. To create more effort, the second hand is placed at a right angle on the back of the palm of the first hand. ... >>

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Articles for a radio amateur designer

Articles for a radio amateur designer; diagrams for a radio amateur designer; descriptions for a radio amateur designer: 220 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

Smart bracelet Sony SmartBand 10.06.2014

Sony has introduced the SmartBand, a water-resistant wristband that tracks and logs the wearer's daily activities.

The "smart" gadget captures the number of steps taken, distance traveled, calories burned, sleep duration. The smart alarm function tells you what time to get up to get into a light phase of sleep. The collected information is uploaded to the Sony Lifelog app in real time. Activities are displayed in the form of diagrams, maps or a time-line log. The owner can always see how active he spent a particular day.

The bracelet is synchronized with smartphones on a platform of at least Android 4.4 (does not work with iOS), the connection takes place via Bluetooth and using NFC technology.

SmartBand will allow you to save data on the social activity of the owner: photos, songs listened to, routes traveled and activity in the social. networks. Lifelog will save all the information and allow you to return to the most memorable moments of your life.

The bracelet also controls the multimedia functions of the smartphone: you can turn on music or video on your phone.
Sony is already present on the market of "smart" gadgets: a year earlier, a smart watch was released - Sony SmartWatch 2 SW2. The emergence of a smart bracelet under the Sony brand has supported the global fashion for a healthy lifestyle.

The cost of the bracelet is $120. It will be available in black, it will also be available to purchase interchangeable colored straps: they are sold in sets in different directions - "sport", "fashion", etc.

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