Additional income

Как можно заработать

How can you make money these days? Not so long ago I came across the ads “we will buy radio component”. I was interested in it. Well, I am aware that the old equipment, computers, all kinds of radio equipment, and even household devices were produced earlier using RECs, which were gilded/silvered for better performance. […]

Boards in mobile phones

Платы телефонов

Phone boards Smartphone, mobile phone is a high-tech device that contains many useful parts, including board containing some precious metals. Chromium and lithium are also present in the chip and battery. The motherboard of a mobile phone This board is the biggest by its size comparing with other components and motherboard cards, responsible for the […]

Mobile phone repair in Lviv at the SMA service center

Ремонт телефонов

Cheap repair of mobile phones Welcome! The CMA service center’s specialists will gladly make mobile phones’ repairs of any kind for you in the city of Lviv! Our technicians will give you a full range of services associated with repair work of mobile phones of any brand. We provide you 100% guarantee for the whole […]

Printed circuit board

Плата печатная

Printed circuit boards. Application Board (correct name is a printed circuit board) is a radio electronic component, which today is used almost everywhere, because there is no device which can work without it. There is a number of different boards in any tablet, computer, mobile phone or TV. Even your washing machine, refrigerator, boiler, and […]

Valuable metals in the REC

Драгметаллы в рэк

The use of precious metals Metals (precious metals), which are called precious, are not exactly because of their high cost; although it does matter, but because of their valuable features that distinguish them from all other metals known to us through the Mendeleyev table. These features include: high chemical resistance, significant resistance to certain chemical […]

Platinum and palladium in radio components

Драгметаллы в радиодеталях

Platinum and palladium in radio components Almost in any radio electronic equipment and device that was produced in the Soviet Union, there were details containing precious metals. Such a need was dictated by the fact that it was necessary to ensure the longest period of operation of the device and its correct, accurate operation. Today […]

Lamps. Types and purpose

Лампа ГУ 74Б

Kinds of lamps, EVD (electric vacuum device) Many people think that the electric vacuum devices are already outdated, because they are uncopmatible with EVD.Our time is marked by a wide development of uniquely small radioelectronic devices. The dictionary includes a special term”nanotechnology”. It must be said that such an opinion is completely wrong. Of course […]

Unique NASA chip

Компьютерный чип

Microcircuit, created for the Venusian “hell” Many scientists, researchers, astronauts and dreamers are trying to conquer Mars, it would seem, nothing surprising, but after all Venus is much closer to the Earth. Maybe we have to start studying it first? But the problem is that Venus has the highest temperature comparing with the other planets […]

Technical Contacts

Контакт на меди

Valuable methals in the contacts Contacts, or contactors is a two-position, electromagnetic device. The meaning of the word in English is “contactee, contact“. This device is designed to turn on / off the circuit running in normal operation. The contact is also a kind of relay, working on electromagnets. Nowadays, all the couplers with a […]

Gold in the radio components


Gold in radio components and REC Since ancient times, for almost all nations and nationalities, gold was considered as the most precious thing. This yellow metal was considered a monetary equivalent in the calculations that were conducted by individual merchants, noblemen and even entire countries. Beautiful ornaments, household utensils, and utensils were created from it. […]


Старый компьютер

Old PCs are a fascinating hobby Retrocomputing can be considered as one of the unusual and original hobbies in the modern world. In fact, retrocomputing is the work and collecting of outdated computer hardware and software to it. The reasons of retrocomputing hobby for enthusiasts may be nostalgic notes, or the desire to preserve the […]

Radio components from disassembled equipment and apparatus


Old radio components Any radio electronic component costs money, because of this many specialists prefer to use various details that remain after disassembling old, idle equipment during repair, for reduction of its price. Naturally, such “extraction” of radio components is economically advantageous, but it is necessary to take into account that the equipment from which […]

Motion sensors

Датчик движения

Motion sensors- small helpers, great savings In order to significantly reduce the consumed electrical energy, you can resort to installation of LED motion sensors, (or, as they are also called, “passive infrared sensors”) in rooms, apartments, offices or streets. To date, due to the environmental situation, and also with the purpose of saving resources for […]

Modern Indicator lamps


“Warm time” for the EVD All what is out-of-date gradually disappears. The old radio components are not in demand any more. They are being already replaced by the products of Chinese industry. The ancient Greek philosopher Heraclitus said: “Everything moves and it costs nothing, and what exists is likened to the course of the river, […]

Filters for gas masks

Фильтр противогаза

Filters for gas masks, types, composition Masks for a long time remain an ideal means of protection, which prevent the ingress of various poisonous substances through the respiratory tract. But, nevertheless, it is necessary to clearly understand that harmful substances that can cause serious harm to humans differ from each other in their influence, and […]

Creation of glower

Лампа нааливания

Incandescent lamps The tungsten glower is not the only, and not the last, development of a physicist from America named William Coolidge. An inexpensive X-ray tube based on a tungsten cathode also belongs to his inventions. Everyone knows how difficult it is to suffer a toothache, it’s unpleasant, and it would seem, how you can […]

Authenticity of silver


Self-determination of the authenticity of silver As they say, life has become better; life has become more fun – even if you are an honest person, not the fact that you will not be deceived. We do not know how to avoid this, but how not to buy fake silver – that’s about what we […]

Graphene microcircuits

Графеновые микросхемы

Paper graphene chips (microcircuits) are not a fiction Researchers from the Iowa University named by Jonathan Klaussen (USA), who prefer to name themselves “nanoengineers”, conduct experiments to find opportunities of using graphene, thanks to its unique properties, in the sensor and other technologies created in laboratory. Thus, a technology is being developed that allows creating […]

Types of connectors


Connector, types, kinds, classification The connector, (this part is also called an electrical connector) is a device that helps to connect two or more conductors to each other electromechanically. A variant that everyone knows is a plug and socket (socket-plug). The number of such connections – from one to infinity, it all depends on the […]

Nickel-cadmium Batteries

Никель-кадмиевые аккумуляторы

Nickel-cadmium Accumulators Nickel-cadmium batteries are a secondary chemical source of current; in the role of cathode, nickel hydrate plus graphite powder, electrolyte-potassium hydroxide plus lithium hydroxide, anode-cadmium oxide hydrate acts here. The operating period can vary from 200 to 1000 charge / discharge cycles, it all depends on the design features, the purity of the […]

Thermoresistance (thermistors)


Thermistor There are many radio electronic components that change some of their parameters under the influence of temperature changes. Such an element is also the thermoresistance, or as it is also called – a thermistor. From the name it is already clear that the part increases resistance when the temperature rises. Thermal resistance is a […]

The history of the appearance of an automatic telephone exchange

Демонтаж АТС

History of the emergence of automatic telephone exchange It is difficult to name the absolutely exact date of the invention of an automatic telephone exchange (ATE), even the year of its appearance varies from 1887 to 1889. Why is it so difficult to determine the time of its appearance? It’s simple – historians, as usual, […]

Carbon instead of silicon in the computers of the future?

Компьютеры будущего

Scientists have found a method how to replace silicon with carbon in the computers of the future Researchers in the field of physics and chemistry have created an innovative system for computers of the future, which is able to work on a carbon basis, without the use of silicon. The advantage of such a computer, […]

All about silver

Проба серебра

Silver, types, samples, application We will not be original if we say that absolutely everyone knows what silver is, and therefore there is no point in retelling the data that everyone remembers from the school chemistry course, and if you do not remember, open the periodic table. We decided to give you more interesting information […]

Filtering gas masks

Фильтрующие противогазы

A gas mask and its types, the history of creation For more than a hundred years, gas masks have been an excellent protective agent, preventing the ingress of various harmful substances, including poisonous substances into the body. There are a lot of types and brands of gas masks, but they are all divided into two […]

Light-emitting diodes

Светодиодные лампы

LED light sources In this age of energy conservation, LED light sources based on diodes were increasingly used, instead of the usual lighting, which was based on incandescent lamps, as well as on lamps containing mercury. LED light sources are more economical, have a long service life, are characterized by increased safety, less heat loss, […]

The eternal rechargeable battery

аккумуляторная батарейка

Almost eternal battery How often and constantly discharged battery, on our favorite boom box or player. Now some people have a constant fear that the favorite gadget will be discharged in the city, and we will remain without communication with the outside world and friends. Is it funny? To someone, yes, but for someone it’s […]

Boards of household appliances

Платы бытовых приборов

Boards in household appliances Today’s household appliances consist mainly of boards. In each house today there are modern household appliances for various purposes, these very devices are “smart”, practical and very comfortable. The current housewives do not even imagine their lives without them, because the need to stay at the cooker for half a day, […]

Boards in the devices

Платы измерительных приборов

Boards in measuring devices All current measuring devices consist of boards, microcircuits. In any production, whether it is a large enterprise, a factory, a small service center, a private repair workshop, almost everywhere there is various equipment and measuring devices necessary for the competent organization of the work process. Not so long ago, fifty or […]

Trains on magnetic suspensions


Trains on magnets are the transport of the future Trains on magnetic suspensions move and also are controlled by magnetic forces and are called magnetoplanes or “maglev”. Movement of such a composition is different from the movement of a traditional train, since the magnetoplane does not touch the rails. There is a gap between the […]

The condenser is edible!

Конденсаторы в промышленности

Condenser, device and purpose The capacitor is a device that allows you to accumulate a significant charge and energy of the electric field. This radio electronic component is structurally similar to a sandwich in which there are two conductors and a dielectric. As a dielectric, a vacuum, a liquid, a solid, and, of course, a […]

History of the development of radio communication


The appearance of the word “radio” More than a hundred years have passed since the moment when radio communication appeared. Many scientists from different countries contributed to the development of this important innovation. But only one person, A.S.Popov is called to be the inventor of the radio. 1895, the Russia scientist A. Popov established communication […]

Types and kinds of connectors


Connectors, types, kinds, purpose An electric (unpolarized) connector, also called a slot, is an electrical device that connects and disconnects mechanically the electrical circuit in a de-energized condition. The most famous connector is a plug and socket. The connection is made by creating contacts between several conductors. The number of contacts can be from one […]

RAM boards

Платы оперативок

Memory boards, types, purpose RAM cards in any computing device perform an important role, being the main element of the machine that processes information. The high speed of the PC depends largely on the amount of RAM, which is extremely important for working with large data sets. And, of course, gamers appreciate the high speed […]


Материнские платы

Motherboard (system) boards For a long time, the motherboard could be met exclusively in the computer system blocks, being their main element. Even today, the motherboard can be found in any digital device, whether it’s a TV, camera, smartphone or something else. Motherboard, or the alternative name “system board”, is a kind of skeleton of […]

Variety of boards

Разновидности плат

Types of boards Speaking about any boards, in the head of any consumer immediately appears an association with modern electronic devices from the usual TVs to high-precision computing equipment, because the principle of the operating is based on all kinds of boards. Even a person, who is wide of technology, has heard about such a […]

Video display boards


Graphics cards A Video display boards is one of the most important components that are connected to the motherboard. It is a universal device capable of converting a digital stream into an image that we see on the screen of a laptop, smartphone, tablet, or monitor of a stationary computer. Modern videoboards allow you to […]

Condensers in the industry

Конденсаторы в промышленности

Application of capacitors in industry The capacitor is a passive radio- electronic component. Physical characteristics: a two-pole component with a certain or variable capacitance value, low conductivity, is capable of accumulating charge and energy of the electric field, can easily charge or discharge. The name “condenser” is of Latin origin, and can be translated as […]

Types of accumulators

Разновидности аккумуляторов

Types of storage batteries Somehow very unnoticeably the technique which works on accumulators became an essential part of the modern families’ life. We even do not think about how and with a help of what our mobile phones, laptops and cameras, construction tools and even toys functionate. Just imagine that all these would work on […]

The device EVD and its application

Устройство ЭВЛ и их применение

Working principle of EVD The vacuum tube is an electrovacuum device (EVD) that operates according to the following principle: in an enclosed vacuum or rarefied gas space, an intense flux of electrons is created. To control this flow an electric or magnetic field is used. The electric current, which is flowing through the vacuum, has […]

Dismantling of the automatic telephone station

Демонтаж АТС

Conditions and features of dismantling At all times, communication was the main way of the development of society. And no wander that the first thing that was captured during the conquest of cities was mail and telegraph. Communication was not only a sign of evolution; it was always its main factor, because without communication development […]

Frequency counter


Frequency counter. What is it? The frequency meter is a measuring instrument that determines the frequency of periodic processes or the harmonic frequency of the spectral signal. The device design: panel, stationary, portable. Area of use of the device. All devices are divided into 2 main classes: electrical measuring, radio measuring. It is important to […]

Technical silver

Техническое серебро

The use of silver in industry The most significant role of silver is its use in various industries for the production of radio electronic components contained in instruments and equipment. Such silver is called technical. What is the difference between technical and “usual” silver, familiar to us in jewelry? Many people think that technical silver […]

The benefit from old radio components


How did I find the treasure in the radio components It turns out that the radio components and instruments, such as voltmeters, ammeters, are stuffed with precious metals. Everyone has in the garage a couple of old TVs, receivers on the legs, disk phones of Soviet times. And all these old things are supposed to […]

Platinum, palladium in the REC

Осциллограф С-114

Valuable metals in radio electronic components Since ancient times, gold and silver were known to people. Precious metals were of high value, because they were used in the processes of producing coins and decoration. A completely different fate was for platinum and palladium. Platinum was generally considered as dirty silver, which has no value. Platinum […]

Oscilloscopes (sorts and types)


Classification and purpose The name of device “oscilloscope” (translated from two languages (Greek and Latin)), means “swing/write”. The device is designed to examine, observe, measure and record the amplitude, time parameters of electrical signals that are output at the input, on the screen or recorded on photographic tape. The modern oscilloscope can read the signal […]

Voltmeter, designation, application


Types of the Voltmeters Any electrical devices need to be checked. Especially, their technical specifications. Such work requires the presence of some special instruments, for example, such as a voltmeter. The very first analogue of the voltmeter was created by the Russian physicist Georg Richman. It was called “a sign of electric force”. The operating […]

Low-frequency generators

Генераторы сигналов низкочастотные

The low-frequency signal generators The low-frequency signal generator is a portable source of electrical frequency oscillations (sound, ultrasound). In the basic mode, a sinusoidal signal, in an additional mode, a square wave signal. Low-frequency signal generators are used to regulate and adjust systems and devices that are used in the radio electronic industry, in communication […]

Soviet radio components

Советские радиодетали

Electronic components – radio components Everyone has heard about such a concept as “electronic components” – the components of electronic circuits. Among the people these components are known as “radio components”. Where did this name come from, and what is in common between radio and electronic circuits? In order to find out about the difference, […]



We buy Potentiometers in Ukraine! What it is? A potentiometer is a resistor that has three outputs: a variable that is manually adjusted. To the two ends of the element of the resistor two terminals are connected, while the engine, being the third terminal, is connected to the sliding contact. To fabricate these resistors use […]

We buy relays


What is relay? The relay is a part used in radio electrical appliances for opening or closing in the circuit of an electrical circuit. It is an aluminum box with contacts inside it. This element has been widely used in instruments and equipment since the 1950s in various countries, including the USSR. It was in […]

Lamps (EVD)


Radio tubes (electrovacuum devices). What is this? The radio lamp is an electronic vacuum device that uses the principle of acceleration/deceleration of electrons in a vacuum (in a space that does not have air or space filled with an inert gas). At the beginning of the last century, vacuum electric lamps were used in almost […]

Silver-plated details

Посеребренные детали

Silver-plated details and products The radio components and boards are exposed to silver plating, and they become more resistant to corrosive processes and can conduct electricity better. Also, in the electrical industry, silver-plated or fully silver contacts are used. Silver-zinc, silver-cadmium batteries have electrodes produced with the use of this metal. Widespread use of silver […]

Printed circuit boards


Printed circuit boards. General information Printed circuit boards, this is the right way to refer to these details, today enter into any electronic devices, ranging from mobile phones, computers, tablets, ending with serious modern military equipment. This small device appeared more than a hundred years ago, marking a significant breakthrough in the development of radio […]

Industrial catalysts, gas mask filters

Фильтр ДП-2

Industrial catalysts The catalyst, as a chemical element, participates in the chemical reactions, but is never presented in the final products of the chemical process. It is used to speed up the reaction, forcing all processes to proceed much faster and more efficiently. Classification by field of application The purpose and scope of their use […]

Electric motors ДПM

Двигатели ДПМ

Electric motors of type ДПM Electric motors ДПM are machines that convert electrical energy into mechanical energy by means of rotational movements of the shaft. They consist of a rotor, an anchor winding, a stator, a brush assembly. Another ability of this motor is to convert mechanical energy into an electric current, i.e. Performs the […]



Contactors, general information The contactor (from Latin – adjoining) is a two-position electromagnetic device that is designed for frequent remote on/off switching in the normal operating mode of the electrical circuit. The contactor is a kind of electromagnetic relay. The most common one and two-pole contactors for circuits with direct current and three-pole for circuits […]



Condensers. General information. All radio engineering and electronic devices, except for microcircuits and transistors, necessarily have capacitors in their composition. Without capacitors, there is no circuit. Condensers perform a variety of tasks. From the history of creation The Leyden jar can be considered as a prototype of the condenser, which was invented by Ewald Jürgen […]



General information A transistor is a resistance converter, a semiconductor, which is necessary to amplify, convert and generate electrical oscillations. The transistor is a crystal, which is placed in a special plastic or metal case, and has three terminals. Crystals of the transistor are made of semiconductor materials. Transistor. History of the invention. The invention […]



General information about electrical connectors Connectors, or, as it is also called in the specialized literature, an electrical connector is an article by means of which an electromechanical connection of one or more conductors is performed. At the same time, the electrical circuits must be de-energized. The most familiar option is the socket and the […]

Precious metals in radio components


Radio components and precious metals in them If you have no idea where to put the old parts and radio components and think about throwing them away, think twice before doing this! Firstly, they can harm the environment. Metals in radio components decompose and release harmful substances into the soil under the influence of chemical […]

Microcircuits (chips)


History of the creation of the microcircuits Just a quarter of a century ago, radio amateurs and electronics specialists had difficulty refusing to use electronic tubes in favor of new semiconductor parts called transistors. And today, transistors make a way to semiconductors of the newest generation – IMC (integrated circuits). Microcircuits can be called as […]

Radio components


The emergence of the term “radio components” The radio components are the electronic components, which are the constituent parts of the electronic circuit. Nowadays, electronic components are widely used in all devices. Many radio components (transistors, resistors, diodes, capacitors) began to be assembled as a single electrical microcircuit, which looks like a complete device of […]

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