Is it possible to repair purchased LED lamps? This question, given the high cost of the lamps, is quite relevant, a lot has already been written on this topic in Internet forums. The most frequently discussed issues are the repair of lamps purchased at Aliexpress.

In the article “Shopping on Aliexpress - personal shopping experience in a Chinese online store”, among other things, it was told about the purchase of LED lamps that are so popular recently. Actually, the article started with these lamps: the quality of these lamps left much to be desired, mostly attracted by the low price. But in some places where too much light is not required, these lamps came in handy. Further exploitation revealed that these lamps are not as durable as promised in the advertisement. If the lamps of the brand "Navigator" with the author of the article have been working without fail for almost two years, then the lamps purchased at "Aliexpress" fail ...

Along with home heating systems by means of boilers requiring constant fuel supplies, there is also a simpler heating method - using electric convectors. The name of the device (electric convector) speaks for itself - electrical energy is converted into heat, and heat, in turn, is transferred through the room due to natural air currents. So from the stationary wall convectors can be mounted a complete heating system for the home.

All electroconvectors are divided into floor and wall (stationary), but they are similar in design. These devices have a hollow metal body conducive to convection, in the lower part of which there is a low-temperature heating element equipped with a plate radiator. This is done so that the cold air entering through the lower inlets can be heated, flowing around the radiator of the heating element ...

Rare, and in particular rare earth, metals are very widely used in various high-tech industries. Mechanical engineering, metallurgy, the chemical industry, solar energy, nuclear and hydrogen energy, instrument engineering, electronics - rare earth metals are used everywhere. It is possible to enumerate all areas of application of rare-earth metals for a very long time, however, let us consider part of this vast spectrum as applied directly to electronics and electric power industry.

The volume of rare-earth metals used not only in computer technology, but also in economical light sources is growing every year. For example, in the USA, due to this, they predict a decrease in energy consumption for lighting by 2 times. Lamps with phosphors containing terbium, yttrium, cerium, europium have already been created there, which allowed up to 3 times higher light output ...

The way to connect electrical appliances to the power supply using a plug and socket exists for a very long time and works reliably. In most cases, such compounds have been functioning properly for decades, without requiring special repairs and maintenance.

However, each landlord can cite facts from his life when malfunctions occurred in these simple-looking devices. But often the causes of their occurrence were not analyzed and ... repeated, oddly enough.

Malfunctions of sockets by types of destruction arise due to: mechanical breakdowns and excess electrical loads. In the first case, due to the application of excessive force, the threads of the connecting parts are torn off or the insulating bodies and covers are broken.Insufficient fastening force of the parts leads to the subsequent pulling out of the socket under voltage from the junction box or burning ...

In the work of any electrical circuit, attention is always paid to its stability and installation quality. Lighting systems, especially those located above the head, must be securely fixed in the power elements of the building and held in them under the influence of loads of various kinds. The most common methods of installing fixtures on the ceiling can be conditionally divided by use: at industrial, industrial facilities, in residential premises.

In laboratories, workshops, workshops, light should evenly illuminate the entire workspace. For this, large-sized fluorescent lamps are often used, which are distributed in rows at a certain height. The method of attachment may be different. Single devices are more convenient to fix directly to the ceiling surface. However, the great height and the need to place a large number of such light sources ...

Since the beginning of mass electrification of the country, the issue of ensuring the protection of electrical equipment and people from electric shock has been an acute issue. For this purpose, the industry launched a mass production of fuses with fusible inserts equipped with a thin wire thread. It burned out during increased load or short circuit in a controlled circuit.

Their design included a permanently installed dielectric block with two contacts, into which a porcelain body with a replaceable fusible insert was screwed. Such fuses were installed in pairs in the phase and neutral wires of the supply network.

After a short operation, the disadvantages of this design were identified: frequent burnout of calibrated insert threads caused by poor stability of the electrical characteristics of the power supply system and low technical literacy of the population ...

The record holder for efficiency among solar panels, one of the one way or another available on the market today, are solar panels based on multilayer solar cells developed by the Fraunhofer Institute for Solar Energy Systems in Germany. Since 2005, Soitec has been engaged in their commercial implementation.

The size of the photocells themselves does not exceed 4 millimeters, and focusing of sunlight on them is achieved by using auxiliary concentrating lenses, thanks to which saturated sunlight is converted into electricity with an efficiency reaching 47%. The battery contains four p-n junctions so that four different photocell links can efficiently receive and convert radiation with a specific wavelengthfrom sunlight concentrated at 297.3 times in the wavelength range ...

Ways to control fixtures without the use of stationary switches are increasingly gaining popularity among the population. This is due to the ease of use and widespread availability of kits for sale, which make it quite easy to switch existing chandeliers to remote shutdown or inclusion.

Manufacturers have now massively mastered the production of original luminaires with LED lamps and garlands that create beautiful lighting effects while saving energy. They can be used without rising from a chair or sofa using a small remote control.

The basis of the remote control is the transition from traditional switches located on the walls of rooms and connected by wires to the chandelier and the apartment panel to the use of radio control channels. To do this, apply: a radio transmitter mounted in a small remote control ...