Color music box. Scheme, description

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Color music box. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Color and music installations, garlands

Comments on the article

Color and music consoles create multi-colored lighting effects in time and in tune with the melodies of the music program being played. They are connected to the output of the receiver, radio, tape recorder or electrophone (parallel to the dynamic speaker head).

Color music prefix

The audio frequency signal is fed through a step-up transformer Tp1 to the input of electric filters. There are as many filters as color channels. In our case, there are three channels, so there are three filters in the set-top box: the first (high-frequency) filter consists of a capacitor C1 and a resistor R1; the second filter (medium frequencies) - from capacitors C2, C3 and resistor R2; finally, the third filter (low frequencies) - from resistors R3, R4 and capacitor C4. The signals passing through the filters are fed to the control electrodes of the SCRs D1-DZ and open them.

A network current passes through open trinistors, which causes multi-colored incandescent lamps L1-LZ to light up. The light of these lamps with the help of reflectors is projected onto the matte transparent screen of the set-top box.

See other articles Section Color and music installations, garlands.

Read and write useful comments on this article.

<< Back

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

Antimatter in the framework of quantum theory: both particle and wave 12.05.2019

The double-slit experiment demonstrates one of the fundamental principles of quantum physics: point particles are also waves. In the standard version of the experiment, particles pass through a pair of slots in a solid barrier. An interference pattern, typical of waves, appears on the screen from the other side. The ridges and troughs emerging from each slot reinforce or cancel each other out as they overlap, creating alternating bands of high and low particle density on the screen.

This kind of experiment revealed the corpuscular-wave duality of photons, electrons, atoms and even large molecules. But it is very difficult to create a strong uniform beam of antiparticles in order to conduct an experiment with antimatter. Now a new double-slit experiment has confirmed the wave-like nature of the electron's antiparticle, the positron.

Researchers have developed a device in which positrons, generated from the radioactive decay of the sodium-22 isotope, pass through two successive rows of vertical rods less than a micrometer thick. The distances between these rods, each a few hundred nanometers across, work like slots in a classic experiment. The positron waves propagate to the nuclear emulsion detector, where the antiparticles change the chemical structure of the silver bromide crystals.

A nuclear emulsion detector "looks like photographic film," says study co-author Marco Giammarchi, a physicist at the National Institute of Nuclear Physics in Milan. Developing a nuclear emulsion film in a dark room and viewing it under a microscope reveals chemical traces of positrons. Indeed, Jammarka's team found a positron interference pattern with alternating bands of high and low positron density.

Jammarcki and his colleagues hope to use the new technique to probe the nature of other antimatter conglomerates, such as positronium.

Other interesting news:

▪ The capacity of hard drives will dramatically increase

▪ Taste of meat and humane treatment of livestock

▪ Laziness is a sign of high IQ

▪ Seafood packaging material

▪ Immortal quantum particles

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 Banking. Lecture notes

▪ article Which European capital has a name glued together from the names of two former cities? Detailed answer

▪ article Mechanic of refrigeration units. Standard instruction on labor protection

▪ article Ultrasonic washing machine. Encyclopedia of radio electronics and electrical engineering

▪ article Simple microphone mixer. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

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