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preamplifiers. Schemes, articles, descriptions

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Preamplifiers

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Regulated power supply, 0-20 volts 2 amps



Section Power supplies. The PSU was called LS2002A - laboratory type, with a cooling fan, circuit with short circuit protection ... >>

Acoustic light switch



Section Lighting. The logic of the acoustic switch is similar to a counting trigger. An audible signal turns on the lamps if they are off, or off if they are on. In the pauses between signals, the state of the lamps remains unchanged. The switch diagram is shown in fig. 1. EL1 - one or more lamps connected in parallel (incandescent or energy-saving) with a total power of up to 1000 W, controlled by a switch. Thanks to the use of economical microcircuits K154UD1A [1] and HEF4013BP [2], the active component of the current consumed from the network when the lamp is off is only 0,88 mA. As practice has shown, the inclusion of a lamp in a DC circuit rectified by a diode bridge VD1, and not alternating current, provides better noise immunity of the device ... >>

Light instead of a call



Section Telephony. The phone call indicator light can work instead of a phone call or simultaneously with it. It will be useful for older people with hearing loss, as well as get rid of phone trills at night. The device will be simply necessary if a small child sleeps in the apartment. The article presents three options for the implementation of such a prefix. All circuits do not consume power in standby mode, do not work when talking or dialing a number on the SLT, and long-term operation of the devices has shown their high reliability. ... >>

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Articles on preamplifiers

Articles on preamplifiers; preamplifier circuits; preamplifier descriptions: 26 articles

 


 

Articles on power amplifiers

 


 

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

DaVinci for High Definition Video Applications 22.03.2008

Since its inception, DaVinci technology has continuously penetrated various segments of the video device market. This is facilitated by the expansion of the family of media processors, the new representatives of which are specialized for a specific application.

The DM6467 processor is a system on a chip designed for devices such as media gateways, digital media adapters, digital video surveillance servers, 1P-set-top boxes. The DM6467 is built around ARM9 and C64x+ cores and a High Definition Video/Image Processing (HDVICP) co-processor.

Peripherals include 10/100/1000 Ethernet, 32-bit PCI, 32/16-bit HPI, USB, 2 McASP, PC, SPI, 3 UARTs, 2 PWM modules, and more. DM6467 Digital Video Evaluation Module (DVEVM) boards.

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