Qualified electricians have such a rule - not to consider themselves smarter than others in their profession. It means: rechecking someone’s work after commissioning some device and seeing a mismatch in the circuit, you should not immediately conclude that a gross mistake has been made here.

It is likely that you yourself did not fully understand the setup of this appliance, the tricks of its configuration and operation. Think about the question that has arisen, look at the documentation on it again, analyze the settings, the effect on other devices. In extreme cases, consult with colleagues.

It is likely that this is not a mistake of the previous specialist, but your ignorance of the features of this circuit and the adjustments made to its algorithm by other electricians. This rule often helps to get rid of unpleasant situations and makes you improve your knowledge ...

A digital oscilloscope is, of course, much more perfect than a conventional electronic one, it allows you to remember waveforms, can connect to a personal computer, has mathematical processing of results, screen markers and much more. But with all the advantages, these new generation devices have one significant drawback - this is a high price.

It is she who makes the digital oscilloscope inaccessible for amateur purposes, although there are “pocket” oscilloscopes worth only a few thousand rubles, which are sold on Aliexpress, but it is not particularly convenient to use them. Well, just an interesting toy. Therefore, while we will talk about measurements using an electronic oscilloscope.

On the topic of choosing an oscilloscope for use in a home laboratory on the Internet, you can find a sufficient number of forums. Without denying the virtues of digital oscilloscopes ...

The desire of a person to create comfortable living conditions has led to the development of various heating systems. Among them, recently, structures mounted on the floor and working at the expense of electricity have become increasingly popular.

Manufacturers produce various modifications that can be arbitrarily combined by type of heating element: cable heating, heating mats, infrared film emitter, liquid-electric structures.

When electricity is transferred based on the Joule-Lenz law, heat is released. This pattern is the basis for the operation of heating elements. If metals and their cross-section are selected in ordinary wires in order to reduce heat losses at maximum load, then structures capable of emitting ...

A group of scientists from the University of Texas at Austin, USA, under the leadership of Yu Guihua, created a flexible electric circuit based on a special gel, which, if cut into two, is completely self-healing and resumes its original electrical conductivity.

The new gel has a combination of properties that were not previously met together, it is flexibility, high electrical conductivity, and the ability to self-repair at room temperature. Such a solution opens up a wide range of possible applications: flexible electronics, robotics, electric batteries, and even soft artificial leather and biomimetic prostheses.

The property of the new gel is provided by two gel-like constituents of its substance: a supramolecular gel (or “supergel”), and a matrix of a conductive polymer hydrogel into which a supramolecular gel is introduced ...

Modern household appliances often have built-in surge protection in their power supplies, however, the resource of typical solutions on varistors is limited to a maximum of 30 tripping cases, and even then if the current in an emergency does not exceed 10 kA. Sooner or later, the protection built into the device can fail, and devices that are not protected from overvoltage will simply fail and bring a lot of trouble to their owners. Meanwhile, the causes of dangerous surge surges can be: a thunderstorm, repair work, surge during switching of powerful reactive loads, and you never know what else.

To prevent such unpleasant situations, surge protection devices (abbreviated as SPD) are designed that take on an emergency overvoltage pulse, preventing it from incapacitating electrical devices connected to the network ...

Online shopping now does not surprise anyone. Everything is very simple: just select and order the goods, pay in any way possible and patiently wait for it to be sent by mail. One of these stores, of course, can be considered Chinese Aliexpress. Here, buyers are attracted to a lot: a variety of goods, low prices, a system of discounts on goods, free delivery and a huge number of sellers. Therefore, the same product can be bought at different prices.

Before becoming a full customer, you must register. The registration procedure is quite simple and free. We won’t write about it here, since a lot of detail has been written about this on the Internet, in addition, there are enough videos on this topic on YouTube. The author of the article would like to talk about his generally poor shopping experience, share his impressions of goods and services. For some reason, the very first purchases were LED lamps of different styles and different capacities ...

Electric underfloor heating can be a truly universal means of heating a room, apartment, or country house. It allows you to evenly distribute heat over the entire surface of the floor itself, and fully warm the air in the room. All types of flooring, whether it is carpet, linoleum, laminate, parquet, tile, or even natural stone, are compatible with such a heating system.

The basis of the electric underfloor heating system are heating cables laid under the floor covering. This can be single-core or two-core cables, or heating mats, which are a reinforced plastic mesh in which a two-core heating cable is laid. The power supply to the cables is regulated by a thermostat that controls the amount of heat transmitted to the floor. During installation, the cables are laid in a concrete screed with a thickness of 3 to 5 cm with the same pitch ...

Since 1879, the safety of people working with electricity has been a hot topic. It was then that the first case of human death from exposure to electric current was registered.

Since then, the number of victims has been increasing all the time. Based on sad statistics, security rules have been created, each item in which is based on someone else's tragedy.

Electricians of various professions have been trained for several years by schools, technical schools, institutes, and specialized courses. After that, graduates of institutions go on an internship at energy enterprises, pass numerous exams and tests. Only after that they are allowed to work independently.

However, even electricians with the highest fifth safety group who have worked for many years due to errors and carelessness, sometimes get serious electrical injuries ...