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Electronics in medicine. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Electronics in medicine

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Antenna tuner



HF Antenna Section. With all the variety of circuit solutions, matching devices perform the same task - they transform the complex input impedance of the antenna into low-resistance (50 ... 75 Ohm) and compensate for the reactive component in a wide frequency range. In English literature, such devices are called ATU (short for antenna tuner unit). The same abbreviation is sometimes used for CW QSOs. Coordination is controlled by an SWR meter installed between the transmitter and the antenna tuner according to the minimum standing wave. The SWR meter can be made according to any scheme, for example, see [1]. It also says how to properly calibrate the SWR meter. Calibration must be performed using an equivalent value equal to the output impedance of the TX output stage ... >>

Autonomous charging for a mobile phone on batteries or accumulators



Section Chargers, batteries, galvanic cells. The situation when a mobile phone is discharged, and there is nothing to feed it, since there is no electrical network (220 V) nearby, is not so rare. I offer a stand-alone charger for mobile phones. It can operate on any type of galvanic cells: AA or AAA finger batteries, D-0,5 or D-0,25 disk batteries, etc. The device is built on the basis of a DC-DC converter based on the MC34063A chip or its analogue KR1156EU5. It is possible to replace МС34063А with АР34063, NJM2360, KS34063 ... >>

Triac power controller



Section Power regulators, thermometers, heat stabilizers. In triac power controllers operating on the principle of passing a certain number of current half-cycles per unit time through the load, the parity condition for their number must be met. In many well-known amateur radio (and not only) designs, it is violated. Readers are offered a regulator that is free from this shortcoming. Its scheme is shown in Fig. 1 ... >>

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Articles on electronics in medicine

Articles on electronics in medicine; schemes of medical electronic devices; descriptions of medical electronic devices: 87 articles

 


 

Technical documentation for medical equipment

Technical documentation for medical equipment of domestic and foreign production. Schematic diagrams, service manuals, technical descriptions, operating instructions: 300 units

 


 

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

The use of sodium bismuthate will accelerate the development of electronics 21.01.2014

It has been ten years since the first samples of graphene were obtained. During this time, scientific journals and various thematic resources have been replenished with a huge number of articles and news regarding more and more new discoveries related to this amazing material. However, the first commercial use of graphene will be only this year with the start of sales of VLF (Very Large Format) batteries intended for the industrial sector and the automotive industry. When graphene will find a place in consumer electronics is not yet clear.

In the meantime, scientists at the Lawrence Berkeley National Laboratory (USA) have discovered that a material such as sodium bismuthate (NaBiO3) can be in a state in which it has properties similar to graphene, while being a three-dimensional structure (graphene is two-dimensional) called three-dimensional topological Dirac semi-metal (3DTDS).

An interesting fact is that this form of sodium bismuthate not only has many of the properties inherent in graphene, but also those that the "carbon film" does not have, while NaBiO3 is easier to manufacture. So in the future it can be used in consumer electronics instead of silicon to create a new generation of microprocessors. In addition, as in the case of graphene, sodium bismuthate can form the basis of quantum computers.

Of course, on the example of the same graphene, we see that many years can pass directly from discovery to introduction into production. Especially at the moment, scientists admit that the new form of sodium bismuthate is not very stable.

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