Free technical library. Articles from Radio magazine, 2004

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Alphabetical list articles with annotations, from magazines published in 2004 in Radio magazine:

1924 From the first issues of the magazine

February 23 - Defenders of the Fatherland Day

8 March

May 9 Victory Day

BIOS: full control or how to unlock hidden features

CeBIT-2004

CeBIT-2004 in Hannover

CES-2004 in Las Vegas

EME in the 47 GHz band

Hi-Fi Show & home theater in Moscow

ICOM IC-7800 - the revival of a legend

ITU TELECOM WORLD 2003

S-meter and output power level indicator for Viola radio station

VIPer-switched switching IP for UMZCH

XIV Conference of the Union of Radio Amateurs of the Armed Forces

Automatic fan switch

Automatic light switch

Automatic watering the garden

Air ionizer automation

Automation programming MK

Automatic charger

Automatic charger for lead acid battery

Automatic power switching

Car stroboscope from a laser pointer

Autonomous digital video recording systems. Autonomous video recorder Tral with built-in WEB server

Answering machine for PBX

PCI interface adapter for peripherals

Acoustic system Verna 100A-10

Acoustic dimmer

Acoustic bass reflex

Analog/Digital Antenna Direction Indicator

Antennas with SU on power lines

1260 MHz Antenna Unit

Archimedes - in Sokolniki

Home theater surround speakers

Grandmother of the Russian radio tube

Safe charging of Li-ion batteries

Proximity sensors

Pedalless wah box

Wireless listening to stereo sound

[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11]

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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

Miniature efficient acoustic amplifier 25.07.2021

Scientists at Sandia National Laboratories have created what can be called the smallest and most efficient acoustic amplifier in the world. This amplifier is based on principles developed about five decades ago, but the latest advances in electronics and nanomanufacturing have made it possible to drastically reduce the size and increase the efficiency of the device by more than 10 times.

Radio signal amplifiers are used today in almost every device, be it a mobile phone or an electric kettle with the ability to access the Internet. Now traditional amplifiers are used to amplify radio signals, but for quite a long time there has been an idea that instead of a stream of electrons, high-frequency acoustic waves can be used.

The first acoustic amplifiers of radio signals appeared in the 70s of the last century. These were relatively large devices, the area of the chips of which reached one square centimeter, their operation required a high electrical potential of the order of 2 thousand volts, and during operation they generated a large amount of heat, which negatively affected the amount of energy consumed, which was 500 mW.

The new acoustic amplifier is a 276 MHz amplifier. In its manufacture, a layer of a semiconductor material, gallium-indium arsenide, with a thickness of only 83 atoms, and a layer of a piezoelectric material comparable in thickness, lithium niobate, was used. As a result, the entire structure of the amplifier fits into an area of 0.5 square millimeters, it operates at a voltage of 36 volts and consumes only 20 mW of energy. At the same time, the new amplifier provides 100 times higher radio signal gain than similar devices of previous generations.

A similar amplifier operating in the 2 GHz band, which is currently used in cellular communications, will have an even smaller size, it will be able to fit in an area of 0.02 square millimeters, which is about 10 times smaller than existing modern solutions.

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Low frequency amplifiers. Article selection

▪ article by Jan Amos Comenius. Famous aphorisms

▪ article What is the most common disease that British doctors have to deal with? Detailed answer

▪ article Water scooter. Personal transport

▪ article Switching antennas by cable. Encyclopedia of radio electronics and electrical engineering

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