If the phase and zero of the electric network are connected to each other under voltage, not directly through the consumer, but directly, then a short circuit will occur, short circuit. Short circuit is the connection of the conductors of the individual phases to each other or to the ground through a relatively low resistance, which is assumed to be zero with a dead metal short circuit.

No network is designed for continuous operation in this mode. However, this emergency mode sometimes occurs. So, a short circuit can occur due to a violation of the insulation of the wiring or due to an accidental short circuit of unlike conductors by the conductive parts of electrical equipment. Normal operation of the electrical network will be disrupted. To prevent this undesirable phenomenon, electricians use terminal blocks or simply isolate the connections ...

Many beginner hams find it difficult to determine the type of power supply, but it's not so difficult. The main methods of voltage conversion are the use of one of two circuitry options: transformer and transformerless power sources.

In turn, transformers differ in the type of circuit: network, with a transformer operating at a frequency of 50 Hz and a pulse, with a transformer operating at high frequencies (tens of thousands of Hz). Pulse circuits of power supplies can increase the overall efficiency of the final product, by avoiding static losses on linear stabilizers and other elements. If there is a need for power from a 220 V household power supply, the simplest devices can be turned on from power supplies using ballast elements to lower the voltage. A widely known example of such a power source ...

No matter how economical the LEDs are, there is no limit to perfection. And the next step in optimizing efficient light sources is luminaires with motion sensors for homes and apartments. Imagine that you no longer need to press the switch button, but just enter the room and the light will turn on itself. The lamp will notice you and immediately light the light.

At the same time, we are not talking about a “smart home” system with some kind of complex software. On the contrary, the motion sensor is built directly into the lamp or is connected directly to it by a wire. Such a sensor works on the principle of an infrared sensor, the so-called "volume", which is completely safe for both humans and animals. Where can this be claimed? Firstly, in the hallways and hallways of houses and office buildings. The lamp turns on for a while while a person is walking along the corridor, then goes out, and you do not need to press anything ...

LEDs replace these types of light sources, such as fluorescent lamps and incandescent lamps. Almost every house already has LED lamps, they consume much less than two of their predecessors (up to 10 times less than incandescent lamps and 2 to 5 times less than CFLs or energy-saving fluorescent lamps). In situations where you need a long light source, or you need to organize illumination of complex shape, an LED strip is used.

Led tape is ideal for a number of situations, its main advantage over individual LEDs and LED arrays are power sources.They are easier to find on sale in almost any electrical goods store, unlike drivers for high-power LEDs, moreover, the selection of a power supply is carried out only by power consumption, because the vast majority of LED strips ...

With the approach of the New Year holidays, the topic of choosing and acquiring a quality New Year's garland becomes more and more relevant. One way or another, a beautiful illumination, designed to emphasize the atmosphere of the holiday, able to please you and your guests with colorful bright lights, should be completely safe.

In the current situation, it will be a big mistake to decide that buying a garland in a store, and not in the market, will guarantee your safety, this is by no means the case. There are low-quality products in the markets and in stores, and vigilance is not necessary to lose anyway. Let’s remember what you should pay attention to when choosing a garland in order to protect yourself from electric shock, and property - from a fire. You can often find Chinese garlands with the possibility of extension, in which each link is equipped with a socket ...

Wind is free energy! So let's use it for personal purposes. If the creation of a wind farm on an industrial scale is very expensive, because in addition to the generator, a number of studies and calculations are necessary, the state does not incur such costs, and for investors in the countries of the former USSR this, for some reason, does not cause much interest. In private, you can make a mini-windmill for your own needs. It is worthwhile to understand that the project of converting your home to alternative energy is a very expensive undertaking.

As already said: you need to make lengthy observations and calculations in order to find the optimal ratio of the sizes of the wind wheel and generator that is suitable for your climate, wind rose and average annual wind speed. The efficiency of a wind power installation within one region can vary significantly, this is due to the fact that the movement of the wind depends not only ...

Andrey Golubev, the author of video tutorials on repairing consumer electronics, microwave ovens, televisions, and audio equipment, devotes his video tutorials to those who do not want to be a slave to customer services and spend many times more money on household appliances when they break down than when they buy.

His main profile is the repair of DVD, CD players, which at one time made Andrei Golubev popular. Then he began to repair microwave ovens, LCD televisions, monitors and other consumer electronics. And so the hobby turned into a real business, and then a desire arose to share the accumulated experience with others. Have you ever seen how experienced specialists easily find faults and masterly handle tools and measuring instruments? Many people are ready to constantly admire someone’s work.without even thinking that they can learn all this ...

Does studying microcontrollers seem complicated and incomprehensible? Before the appearance of Arudino, it was really not easy and required a certain set of programmers and other equipment. This is a kind of electronic constructor. The initial objective of the project is to allow people to easily learn how to program electronic devices, while devoting minimal time to the electronic part.

The assembly of the most complicated circuits and the connection of the boards can be carried out without a soldering iron, and with the help of jumpers with detachable connections “father” and “mother”. In this way, both attachments and expansion cards can be connected, which in the lexicon of the arduinists are simply called “Shields”. The base and most popular board is considered Arduino Uno.This fee resembles a credit card. Most shields that are on sale are perfect for her. On the board for connecting external devices ...