Electronics and computer. Schemes, articles of the Free Technical Library

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Free library / Schemes of radio-electronic and electrical devices

Electronics and computer. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Electronics and computer

We recommend reading in our Free Technical Library:

Telegraph machine for repeater

Section Civil radio communications. According to the new rules, each repeater must have his own call sign and at least once every fifteen minutes report it by telegraph on the air. Somehow I happened to make a similar machine based on a PIC processor. I will be glad if someone will use this design ... >>

Finding Large Objects with a Metal Detector

Section Metal detectors. Deep metal detectors are devices designed to search only for large objects at a depth of 2-6 m, using the RF principle and coils located at a great distance from each other (50-700 cm) in perpendicular planes. For these purposes, impulse devices with a coil diameter of a meter or more are also used. These devices are good for searching chests, safes, lost equipment, etc. Deep metal detectors are not sensitive to coins and other small objects and do not distinguish between metals ... >>

Push-Pull Transistor Power Amplifier

Section Transistor power amplifiers. One of the reasons that prevent the amplification of sound programs with high fidelity lies in the non-linear distortions that occur in the active elements of the amplifier. In this case, there are such types of distortions as harmonic and cross-modulation. The modern development of semiconductor technology and circuitry can significantly reduce the influence of non-linear distortions of active elements on the quality of reproduction. Recently, in the foreign press, for example, in US patent No. 039965, there have been reports that during sound tests of amplifiers with high linearity of elements, highly qualified experts noted distortions of the audio signal that could not be registered by measuring instruments. It seemed that an unknown source of noise signal was operating in the amplifier ... >>

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Articles on computers

Computer interfaces
Computer devices
Computer modding
Working with CAD programs
Miscellanea

Computer interfaces

Articles on computer interfaces; schemes of computer interfaces; descriptions of computer interfaces: 43 articles

Computer devices

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

Computer modding

Articles on computer moding; computer modding schemes; descriptions of computer modding: 20 articles

Working with CAD programs

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

Miscellanea

Articles on various computer devices; diagrams of various computer devices; descriptions of various computer devices: 32 articles

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Voice will betray depression 23.07.2019

Computer science researchers at the University of Alberta, Canada, have taught artificial intelligence to more accurately identify a depressed person by the way their voice sounds. Scientists plan to develop a mobile application based on this technology that will help track mood in real time, the university website says.

The work of Canadian scientists is based on past research, which shows that the timbre of our voice contains information about our mood. Using standard reference datasets, the researchers developed a methodology that combines several machine learning algorithms to more accurately recognize depression using acoustic signals.

"A realistic scenario would be for people to use an app that would collect voice samples when they speak naturally. An app on the user's phone would recognize and track mood indicators (such as depression) over time," notes one authors of the development, Professor Eleni Struliya.

Such a "mood pedometer" could help people reflect on their own moods over time and provide accurate data on changes in a patient's emotional state to their doctor.

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