Reference materials. Schemes, articles of the Free Technical Library

FREE TECH LIBRARY
Free library / Schemes of radio-electronic and electrical devices

Reference materials. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Reference materials

We recommend reading in our Free Technical Library:

What is CB (Citizen Band)?

Section Civil radio communications. In English - Citizen Band, in Russian - civil radio communication band (from 26.970 MHz to 27.850 MHz). In Russia, radio communication in the CB band was allowed in 1988. It assumes the presence of 2 or more radio stations providing communication in the simplex mode (pressed - speak, released - listen). Permissible types of radio frequency modulation: Amplitude -AM, Frequency -FM, single-sideband -SSB (upper sideband - USB, lower sideband -LSB). Permitted transmitter power: for FM - carrier power no more than 10 W, AM and SSB peak power no more than 10 W ... >>

Small metal detector

Section Metal detectors. A small-sized metal detector can detect nails, screws, metal fittings hidden in the walls at a distance of several centimeters. The metal detector uses a traditional detection method based on the operation of two generators, the frequency of one of which changes when the device approaches a metal object. A distinctive feature of the design is the absence of home-made winding parts. The winding of an electromagnetic relay is used as an inductor. ... >>

Laser-iron technology for the manufacture of printed circuit boards

Section Ham Radio Technologies. The original method of significantly reducing the time spent on the manufacture of a printed circuit board. I recall with horror how, before buying a laser printer, I assembled the circuit I liked, or didn’t assemble it, because, having estimated how long it would take to wire the board on a sheet of paper, and then painting it all with a drawing pen with paint on getinax, I often refused such an undertaking. LUT is not simple, but very simple, the lion's share of the time spent on manufacturing a printed circuit board has sunk into oblivion. Now it is enough to run the board layout program, add details in it, trace and print the finished result. ... >>

To any article in this section and all Encyclopedias you can leave your comment.

Articles with reference materials

Articles with reference materials; diagrams with reference materials; descriptions with reference materials: 339 articles

Latest news of science and technology, new electronics:

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

New method for creating powerful batteries 08.05.2024

With the development of technology and the expanding use of electronics, the issue of creating efficient and safe energy sources is becoming increasingly urgent. Researchers at the University of Queensland have unveiled a new approach to creating high-power zinc-based batteries that could change the landscape of the energy industry. One of the main problems with traditional water-based rechargeable batteries was their low voltage, which limited their use in modern devices. But thanks to a new method developed by scientists, this drawback has been successfully overcome. As part of their research, scientists turned to a special organic compound - catechol. It turned out to be an important component that can improve battery stability and increase its efficiency. This approach has led to a significant increase in the voltage of zinc-ion batteries, making them more competitive. According to scientists, such batteries have several advantages. They have b ... >>

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Random news from the Archive

Traces of a collision of two super-Earths discovered 02.02.2019

Scientists have discovered traces of an interplanetary cataclysm outside the solar system for the first time. The discovery was made during observations of Kepler 107, a sun-like star located at a distance of 2 light years.

Four exoplanets revolve around this star. Astronomers drew attention to the unusual properties of the second and third of them - respectively, Kepler 107b and Kepler 107c. They are about the same size, each one and a half times the size of the Earth. But the mass is noticeably different. Kepler 107c turned out to be twice as heavy as its neighbor. This indicates the presence of a large, iron-rich core, according to Nature Astronomy.

The current theory says that the most massive planets are located near the star, since their particles are less scattered than light hydrogen and helium. But Kepler 107c is farther from the center than its "lightweight" neighbor.

Scientists have considered several theories to explain this fact, including the migration of the planet. The most likely recognized "space accident." Millions of years ago, two bodies, each about ten times the size of Earth, collided near a star. They were saturated with iron, and their collision could give rise to a new planet, which consisted of 70% of this element. The remains of the rocks, obviously, evaporated during the explosion.

Other interesting news:

▪ Monitor Philips 275P4VYKEB 5120x2880 pixels

▪ Cage for carbon dioxide

▪ No spots left on the sun

▪ New geothermal technology Fervo Energy

▪ An easy way to check your heart

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Factory technology at home. Article selection

▪ article Put a cross. Popular expression

▪ article How does water turn to ice? Detailed answer

▪ article Locksmith for the installation and dismantling of woodworking equipment. Standard instruction on labor protection

▪ article Homemade wind generator. Encyclopedia of radio electronics and electrical engineering

▪ article Magic rope. Focus Secret

All languages of this page

Home page | Library | Articles | Website map | Site Reviews