In previous articles, various issues related to connecting LEDs have been described. But you cannot write everything in one article, so you have to continue this topic. Here we will talk about various ways to turn on the LEDs.

The Chinese industry produces all kinds of souvenirs, trinkets, lighters, in which the LED is turned on without a limiting resistor: just two or three disk batteries and one LED. In this case, the current is limited by the internal resistance of the battery, the power of which is simply not enough to burn the LED.

But here, in addition to burnout, there is another unpleasant property - degradation of LEDs, most inherent in white and blue LEDs: after a while, the brightness of the glow becomes very small, although the current through the LED flows quite enough, at the nominal level. This is not to say that it does not shine at all ...

Work related to the connection of the internal network goes far beyond the elementary electrical connection of the upper terminals of the input automatic machine and the main transmission line network.

The technical nuances and difficulties in this matter are due to the fact that the branches from the power transmission lines and the input itself actually remain without protection against overcurrents of short circuits. After all, on a support in the place of branch execution, in the general case, there are no any protection devices.

Therefore, a short circuit in the branch is fraught with an elementary fire, because the hot arc between the conductors in the case of this short circuit itself will stretch to the very destruction of these unfortunate conductors. For equipment in the substation, there will be no emergency operation: the wrong current level. Accordingly, a protective shutdown will not occur. This situation is most dangerous for obvious reasons for wooden houses. And the most dangerous part of the short circuit branch is wall penetration ...

There is a lot of talk about the need to obtain electricity from renewable sources. They are environmentally friendly and unlimited in use.

What prevents alternative energy sources from completely replacing traditional minerals today? This is hindered by a number of economic, technical and political reasons. This article discusses the technical reasons and developments that will help to overcome them.

Alternative energy is most widely represented by solar and wind power plants. They give the world a large part of clean electricity. There is a common problem for all renewable electric energy sources. It is associated with the need not only to generate electricity, but also to store it. After all, the sun does not shine at night and it is not always windy ...

At the mere mention of the word "locksmith" in the mind there is a person who performs mainly mechanical work. In his hands you can see a screwdriver, file, wrench and even a sledgehammer. All these tools are also used by the instrumentation and automation fitter, since the equipment that has to be repaired, adjusted and serviced is the most diverse.

Here you can meet the thinnest, almost watch mechanisms, heating furnaces, water valves, injection mechanisms of large injection molding machines or frequency-controlled electric drives. Therefore, the instrument requires the most diverse: from microscopic screwdrivers to pipe wrenches of the latest number.

When carrying out various communication lines, for example, to connect sensors, a sledgehammer is often used, and even scrap. Without this tool, a hole in a brick, especially a concrete wall ...

Almost all modern technological equipment is automated. These are CNC machines, injection molding machines, various automatic lines, automated boiler rooms, water and sewage pumping stations, gas pipelines, power supply systems and much more. A lot of automated equipment at metallurgical plants, in transport in mechanical engineering and in the automotive industry.

Modern automation is most often performed on microcontroller control circuits, which replaced the control units on microcircuits with a small degree of integration. And this is not just a fashion or a tribute to time. Such a replacement allows you to automate almost everything. But the microcontroller is not everything. Typically, automated equipment is connected to a computer, which in turn is connected to a computer network. Not only production equipment is being automated ...

Our country has always been famous for engineers and inventors. In Soviet times, engineers had almost the highest qualifications in the world. During the Soviet Union, a system of professional technical and education was very well developed. The profession of a worker and technical specialist in importance and respect was one of the first places.

The perestroika and collapse of the USSR with a protracted economic crisis, and changes in public values ​​led to a reduction in vocational schools and significantly reduced the number of young specialists in the electrical field. All note a shortage of technical personnel. Enterprises require thousands of specialists in technical positions. However, it is very difficult to find personnel of the claimed high qualification. A serious shortage of highly qualified specialists in the electrical industry is an ever-growing problem ...

To date, no overhaul can do without a wiring device and electrical equipment. Even if you plan to carry out cosmetic repairs, and at the same time live in an old-style house, then you just need to replace the electrical wiring. This is due to the fact that the installation of electrical equipment and wires was carried out in the old rooms, designed for loads that are considered insignificant by modern standards.

In the sixties of the last century, no one could even think that they would need an electric cable that would withstand the load of many simultaneously connected various electrical appliances. A huge TV, a powerful computer, a refrigerator, air conditioning, an electric kettle, a vacuum cleaner - and this is not a complete list of electrical equipment that are today an integral part ...

Water will find a hole. This proverb is known to all. The most important thing is that it is confirmed, albeit not very often, but the consequences can be the most deplorable. Here we will talk about what the leakage of water or sewer pipes in the apartment is fraught with. Often, we learn about these cases from an angry neighbor living on the floor below.

And, as a rule, the flooding of the lower neighbors occurs just after they made an expensive renovation, because they don’t do anything else now. Here you can see anything: a sagging and collapsed stretch ceiling, wallpaper behind the walls, a surfaced parquet or expanded linoleum, under which a warm floor was laid.And it’s not at all good for the flood to go for electrical wiring.

The drafting of acts begins, the circulation in the courts and house management companies. Repeated repairs are done, of course, at the expense of the upper neighbor. And about spoiled relationships and spent nerves ...