Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library

Welding equipment. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

welding equipment

We recommend reading in our Free Technical Library:

Antenna GP Plus

HF Antenna Section. The design of a vertical antenna from the book by K. Rothammel is taken as a basis, but instead of a vertical half-wave vibrator, in order to increase the wave resistance, a stub emitter with a system of counterweights located at an angle of 120 degrees is used. The four passive antenna elements are bent at the same angle. Relays are installed in the middle of each passive element, Fig. 1 ... >>

Improving the technical characteristics of radio receivers

Section Radio reception. Using VHF quartz filters, Schottky diodes and high-power RF transistors, it is possible to significantly improve receiver parameters such as linearity and image selectivity. Describes eight ways to improve radios, including choosing a high intermediate frequency, using separate AGC and gain, using push-pull frequency converters, using stages for double balanced frequency converters with Schottky diodes, and optimal distribution of AGC across receiver stages ... >>

Combined power regulator on the K145AP2 chip

Section Regulators of current, voltage, power. I propose an interesting power regulator designed to control incandescent lamps. Unlike many other similar devices, this device has a triple load control (touch and push-button smooth power control, switching on to a previously installed power). The regulator also contains a sound relay, which, reacting to a loud sharp sound, allows you to remotely turn off the working lamps ... >>

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

Articles on welding equipment

Articles on welding equipment; schemes of welding equipment; descriptions of welding equipment: 117 articles



All articles for an electrician

Regulatory documentation for an electrician



Latest news of science and technology, new electronics:

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 ... >>

High Energy Density Capacitor 17.05.2024

Energy plays a key role in many aspects of modern life, and the ever-increasing demand for efficient and fast-charging power sources is driving innovation. Researchers at the McKelvey School of Engineering at Washington University in St. Louis have taken a significant step forward with a high-energy-density capacitor that promises to revolutionize the world of energy. A team of scientists from the McKelvey School of Engineering at Washington University in St. Louis presented the results of their latest research on heterogeneous thin-film structures for capacitors. Researchers, working with ferroelectrics, inadvertently created a capacitor with an amazing energy density that is 19 times higher than that of conventional elements. This breakthrough opens up new prospects for the development of fast-charging batteries, which are so necessary in the modern world. Capacitors play a key role in various devices, providing stable ... >>

Causes of conflicts between brothers and sisters 16.05.2024

Family relationships are often complex and multi-layered, and conflicts between siblings are no exception. Research in this area can help us understand what factors underlie these conflicts and why they occur so frequently. Let's look at some of the findings from psychologists at Arizona State University. American psychologists from Arizona State University conducted a study aimed at identifying the causes of conflicts between brothers and sisters. They found that different forms of violence, whether physical or verbal, did not depend on the gender of the siblings. This means that both girls and boys can exhibit aggressive behavior towards their loved ones. Other studies have shown that conflict between siblings often persists into adulthood, even as contact decreases. This indicates that people often follow established patterns of behavior formed in childhood. It was also found that, despite ... >>

Random news from the Archive

The fastest mobile Internet 27.01.2014

South Korean mobile operator SK Telecom announced its intention to modernize its LTE-Advanced network through Carrier Aggregation (CA) with a combination of three bands. Thanks to this, it is planned to achieve a record throughput for the mass market of 300 Mbps.

Last summer, SK Telecom launched the world's first commercial LTE-Advanced network, where data transmission can be carried out at speeds up to 150 Mbps. This is twice as fast as the LTE networks deployed in many countries, and ten times faster than 3G technology. The operator does not intend to stop there.

A press release on SK Telecom's website says that the company plans to launch a high-speed mobile network called 3band LTE-Advanced before the end of the year, where users will be able to transfer data at 300 Mbps. For this, frequency aggregation will be used - two 10 MHz channels and one 20 MHz.

Chipsets and devices capable of connecting to the 3band LTE-Advanced network are already in development. Their appearance on the market is expected by the end of this year, the operator claims.

On networks up to 300 Mbps, an 800 MB video is expected to download within 22 seconds. In conventional LTE networks, this takes about 85 seconds, in 3G networks - about 7 minutes 24 seconds.
At the Mobile World Congress in Barcelona in February, SK Telecom is planning to showcase its 3band LTE-Advanced service using three 20MHz bands and capable of transmitting data up to 450Mbps.

Other interesting news:

▪ Energy cases for iPhone 6 and iPhone 6s

▪ Laser holograms will improve the quality of industrial XNUMXD printing

▪ Successful 3D printing in space

▪ Wireless speaker Sony SRS-XV900

▪ Running with a virtual opponent

News feed of science and technology, new electronics


Interesting materials of the Free Technical Library:

▪ section of the Antenna website. Article selection

▪ article Penitent Magdalene. Popular expression

▪ article Which of the creations of human hands can be seen from the moon? Detailed answer

▪ Article Ziziphora Crimean. Legends, cultivation, methods of application

▪ article Multichannel remote voltmeter. Encyclopedia of radio electronics and electrical engineering

▪ article Microcircuits of voltage stabilizers. Encyclopedia of radio electronics and electrical engineering

All languages ​​of this page

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