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Working with CAD programs. Schemes, articles, descriptions

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Working with CAD programs

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Stroboscopic SDU

Section Consumer Electronics. A distinctive feature of the described light-dynamic installation is the use of special pulse lamps instead of conventional incandescent lamps. This eliminates the main disadvantage of such devices - high inertia. With its help, you can get excellent light accompaniment of musical works, as well as solve the problem with the design of discos, concert halls, living rooms ... >>

radio reception

Section Beginner radio amateur. Radio waves cannot be detected by any of our senses. But if a conductor is encountered on the path of radio waves, they give it a part of all energy. The reception of radio broadcasts is based on this phenomenon. Capturing the energy of radio waves during the operation of your first receiver was carried out by an antenna. Giving the antenna part of the electromagnetic energy, the radio waves induced modulated high-frequency oscillations in it. In the receiver, processes are reversed to those that occur in the studio and on the transmitter of the radio station. If there the sound is sequentially converted first into electrical oscillations of sound frequency, and then into modulated oscillations of high frequency, then during radio reception the inverse problem is solved: the high-frequency modulated oscillations excited in the antenna, the receiver converts into electrical oscillations of sound frequency, and then into sound ... >>

Principles of building high-power LEDs

Section LEDs. High-power LED designs are based on the following principles: highly efficient emitting heterostructures are used in AlGalnP/GaAs systems. AlGalnP/GaP and InGaN (the active region of the heterostructure contains either a single or multiple quantum wells), emitting crystals have an increased area S of more than 1 mm2 (instead of 0,05 mm2 in standard LEDs with a diameter of 5 mm), an increase in the crystal area is aimed at increasing the operating current , i.e., to increase the luminous flux and reduce the thermal resistance of the crystal, to increase the luminous flux in a number of designs, several crystals are used, connected both in series and in parallel-series, powerful copper or aluminum bases (radiators) are used as a crystal holder to improve heat dissipation ), appropriate reflectors are used to collect and convert the lateral radiation of the crystals, for efficient output of radiation and the formation of a given radiation pattern, the LED designs contain a polymer lens matched in size with the lateral radiation reflector, and in some designs a secondary optical iku ... >>

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Articles on CAD programs

Articles on CAD-programs; descriptions of CAD programs: 4 articles



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Latest news of science and technology, new electronics:

Blinking of the magician and his audience 19.05.2024

Magic and illusions have always captured the attention of the public, but what happens behind the scenes of the magician and in the brains of his audience? Scientists from the UK decided to solve this mystery by conducting a new study involving ten illusionists of varying experience. Illusionists, some of whom had been practicing magic for more than half a century, others for only six months, were invited to demonstrate the same trick - the popular coin trick. Recordings of their performances during training and on stage showed that each of them began to blink significantly more often at the moment of performing the trick. The study's findings indicate that magicians' blink rate may be related to unconscious aspects of their performance. At the same time, as scientists have found, spectators also begin to blink more often, following the movements of the illusionist. This observation supports the idea that magicians may be catalysts for blinking in audiences. Additional research has shown that magicians blink more often during ... >>

Ultrasonic coffee machine 19.05.2024

Iced coffee has become an integral part of coffee culture in recent years. Therefore, engineers from the University of New South Wales decided to improve its preparation. They have developed an ultrasonic coffee machine that reduces the cold brew time for ground coffee beans from 12-24 hours to significantly less time. Iced coffee, or "Cold brew", is popular due to its smoothness, low acidity and low bitterness. It is prepared by steeping ground coffee in cold water for a long time. Unlike traditional hot brewing, which often imparts bitterness to coffee, cold brewing extracts more delicate and complex flavors from the coffee beans. The innovative system, presented by a team of engineers, introduces ultrasonic technology into the coffee preparation process. The system uses ultrasonic waves to speed up the process of extracting oils, flavor and aroma from ground coffee. This allows you to significantly reduce the time ... >>

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 ... >>

Random news from the Archive

Powerful PWM amplifier MSA240 20.01.2006

The powerful MSA240 PWM amplifier from APEX MICRONECHNOLOGY has an output power of up to 2 kW (voltage up to 100 V and current up to 20 A).

The switching frequency can vary widely. The amplifier can be used as a driver for electric motors, as a class D sound amplifier, as a driver for powerful magnetic actuators. The block has a low cost.

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