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Surge Protectors. Schemes, articles, descriptions

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Surge Protectors

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Stabilized power supply, 40 volts 1,2 amps



Section Power supplies. This power supply (Fig. 3.1) was used to power an amateur AF power amplifier and has good parameters: output voltage 40 V, load current 1,2 A, stabilization factor> 100 ... >>

Metal detectors FM (Frequency Meter), theory



Section Metal detectors. One of the first possible options for constructing a detector of metal objects, which can come to the mind of any person at least a little familiar with the basics of electrical engineering, can be considered a device based on a change in the frequency of the generator under the influence of a metal object. It is known from school physics textbooks that the frequency of the signal generated in a circuit formed by a coil L and capacitor C connected in parallel depends on the inductance of the coil and the capacitance of the capacitor. If you change at least one of these parameters, the resonant frequency of the circuit will change, which will lead to a corresponding change in the generation frequency. The easiest way to change the inductance of the coil. To do this, it is enough, for example, to place an object made of the appropriate metal near it ... >>

Frequency synthesizer for VHF radio station



Section Frequency synthesizers. The proposed frequency synthesizer (MF) for a radio station in the range of 144 ... 146 MHz with the first intermediate frequency of 10,7 MHz is distinguished by simple circuitry and good repeatability. The tuning step is 25 kHz, two decimal position switches are used for tuning in the range, at the output of which there are signals in the code 1-2-4-8. This MF uses the principle of mixing VCO frequencies and an additional high-frequency oscillator to obtain a low IF (0.3 ... 2.3 MHz) supplied to a variable division ratio divider (CVD) ... >>

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Articles on Voltage Stabilizers

Articles on voltage stabilizers; voltage stabilizer circuits; descriptions of voltage stabilizers: 173 articles

 


 

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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

Headphones Logitech G Fits 22.09.2022

Logitech introduced the G-Fits wireless headphones. They are positioned as a gaming solution and support not only Bluetooth connection, but also Lightspeed high-speed wireless technology.

An interesting feature of the device is the ability to take the shape of the ear of its owner. Thanks to Lightform technology, G Fits silicone eartips melt and fill the ear space, taking on its individual form. You can control the process through a special application, you only need to adjust the shape of the ear cushion once. As a result, the headphones provide high-quality protection against external noise, and also will not fall out.

Logitech G Fits have seven hours of battery life on a single charge when connected via LightSpeed ​​and ten hours when using Bluetooth, with the charging case extending that time by eight and twelve hours, respectively. Speech clarity is ensured by two microphones in each earpiece. The model is available in black and white.

The Logitech G Fits will be available in October for $229,99.

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