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Electronics - musician. Schemes, articles, descriptions

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Electronics - musician

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Transformerless power supply on KRENK, 220/12-22 volts



Section Power supplies. When it is necessary to power some home device with a low current consumption (up to 150 mA) from the mains, which works autonomously (clock, night light, electronic thermometer, etc.) and has a plastic case (the risk of electric shock is excluded), it is advisable to use transformerless power supplies. In the proposed source, the KR142EN8 microcircuit is used as a stabilizer. The source provides an output voltage of 12 V, which depends on the type of integrated regulator used. With a load current of up to 150 mA, the DA1 chip has a small voltage drop, i.e. the difference between the input and output voltage DA1 is no more than 2,5 V ... >>

Convert potentiometer angle to digital code



Section for radio amateur-designer. By placing a few bytes of program into an 8008/8080 microprocessor and using a 555 type integral timer, a system can be created that converts the potentiometer angle into a digital code. This method is convenient and advantageous to use in cases where information about the position of the potentiometer is input to a system containing a microprocessor (process control systems, television games, etc.). As shown in the figure, the microprocessor strobe pulse starts the 555 integrated timer, which is switched on in a standby multivibrator circuit. The time interval corresponding to a high potential at the output of the timer is proportional to the resistance of the potentiometer ... >>

MMA welding



Section Welding equipment. Until now, manual welding with stick electrodes (MMA) has prevailed in production and in everyday life. And if direct current welding is mainly used in production, then in everyday life they prefer to use alternating current. This is due to the simplicity, low cost and reliability of transformer AC welding sources. In manual welding in the current range from 60 to 300 A, the arc has a rigid static current-voltage characteristic ... >>

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Articles on electronic devices for a musician

Articles on electromusical devices; schemes of electromusical devices; descriptions of electromusical devices: 62 articles

 


 

Latest news of science and technology, new electronics:

Using Apple Vision Pro during surgery 16.03.2024

The medical team at Cromwell Hospital in London used Apple Vision Pro for the first time during two spinal surgeries. This event confirms the headset's potential as a medical tool that will change the way surgical practice is performed. Although the doctors themselves did not use Vision Pro, the operating room nurse worked with virtual reality using glasses while preparing and performing procedures. The headset made it possible to view virtual screens in the operating room, select instruments and monitor the progress of the operation. Software developed by eXeX, a company that specializes in creating artificial intelligence-based applications for surgery, has significantly improved the patient care process. Using Apple Vision Pro opens up new opportunities for developing healthcare applications such as clinical education, surgical planning, training and medical imaging. Implementation of Apple Vision Pro in the medical industry ... >>

Carbon storage in the North Sea 16.03.2024

Norwegian Energy Minister Terje Åsland has announced the launch of the Longship project, which aims to create a central carbon dioxide storage facility in the North Sea. This ambitious project is valued at $2,6 billion and aims to apply CCS (carbon capture and storage) technology to mitigate the impact of climate change. Norway already has experience in CCS, thanks to the successful Sleipner and Snohvit projects, and is now looking to increase the amount of carbon sealed beneath the seabed. Longship's plan calls for capacity to capture and store 1,5 million tons of carbon annually over 25 years. Despite the positive outlook, there are concerns about the long-term consequences of such storage. However, proponents of the project argue that offshore carbon storage has a number of advantages, including minimal environmental impact. The Longship project is carried out with the participation of Equinor, Shell and TotalEnergies through the joint venture Northern Li ... >>

Mini-organs grown from human amniotic fluid 15.03.2024

An international team of scientists led by Professor Fan Xiulin from Zhejiang University has developed a unique method of growing mini-organs from cells found in human amniotic fluid. This significant medical breakthrough could lead to improved diagnosis and treatment of congenital diseases. The organoids, which are three-dimensional cellular structures that mimic organs on a smaller scale, were grown from lung, kidney and small intestine cells found in amniotic fluid. This method opens up new possibilities for studying various fetal conditions and may be the key to early diagnosis and treatment of birth defects. Although no treatment has yet been attempted, the scientists hope their research will help combat the serious congenital diseases that affect millions of newborns each year. This breakthrough could change medical interventions by making it possible to diagnose and treat congenital diseases. ... >>

Random news from the Archive

Bacteria can survive interplanetary travel 27.08.2020

The discovery may support the panspermia theory, according to which life did not originate on Earth, but arrived here from other places in the universe.

What if microorganisms could drift through space, spreading the seeds of life across planets? Is this how life appeared on Earth? Is such a journey possible? A study of the astrobiological mission "Tanpopo", which means "dandelion" in Japanese, demonstrates that this is quite possible.

Samples of bacteria of the genus Deinococcus, which live high in the Earth's atmosphere, lived for three years in the vacuum of space outside the International Space Station, surviving microgravity, intense ultraviolet radiation and extreme temperatures.

The discovery may support the panspermia theory, according to which life did not originate on Earth, but arrived here from other places in the universe.

The theory is skeptical precisely because until now it was believed that microorganisms are not able to survive in the extreme conditions of outer space. Japanese researchers have proven otherwise. They placed Deinococcus spores on display panels outside the ISS. Samples of different thicknesses were exposed to the space environment for one, two or three years. All specimens larger than 0,5 mm survived.

According to scientists, Deinococcus can survive the journey from Earth to Mars, and on a spacecraft they can live from 15 to 45 years.

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