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Computer devices. Schemes, articles, descriptions

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Remote control transmitter



Section Radio control equipment. The figure shows a schematic diagram of a transmitter for remote control of models. The simultaneous use of both npn and pnp structure transistors, as well as a unijunction transistor, made it possible to obtain a fairly simple device with good performance characteristics. The radio frequency path of the transmitter is made on transistors T1 and T2. The frequency of the master oscillator on the transistor T1 is stabilized by a Pe1 quartz resonator (27,12 MHz). The connection with the final stage is inductive. The final stage transistor T2 operates in class C (without pre-bias on the base). End stage load - n-loop, which makes it easy to select the optimal operating modes of the stage and communication with the antenna ... >>

Infrared remote control for computer



Section Infrared technology. If you watch your favorite movies lying on the couch, or listen to WinAmp, and you are too lazy to reach for the keyboard to rewind the song or mute the sound or something else, then this device is just for you. This is something other than a regular COM infrared port controlled by any remote control, and a special program that actually controls the operation of a particular application. So, in order ... >>

High-Q notch filter on transistors



Section Electronics and computer. The article discusses a simple high-quality narrow-band notch filter using transistors, which works perfectly in a frequency band of up to 1 MHz and quite satisfactorily up to 10 MHz. Simple calculation formulas for filter synthesis are derived using the notch frequency and passband as the initial values. For the calculations, we used the mathematical CAD system Maple with the MathSpice extension package [2] and the electronic CAD system OrCAD [3] ... >>

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Articles on computer devices

Articles on computer devices; diagrams of computer devices; descriptions of computer devices: 98 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

Embedded UFS 2.1 96-layer 3D NAND Flash 11.10.2018

Western Digital has unveiled the industry's first 96-layer 3D NAND flash embedded drive with UFS 2.1 interface. It received the designation iNAND MC EU321.

The new drive accelerates artificial intelligence (AI), augmented reality (AR), high-resolution multi-camera photography, 4K video capture and other demanding applications for high-end mobile and computing devices.

iNAND MC EU321 can be found, for example, in high-end smartphones that support 5G networks. The drive provides sequential write speeds up to 550 MB/s and performance up to 52 IOPS on random access write operations. In read mode, these figures reach 000 MB / s and 800 IOPS, respectively. Western Digital currently ships drives ranging from 50GB to 000GB to OEMs.

Drive dimensions - 11,5 x 13 x 1,0 mm.

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