Let's face it - a universal answer to this question simply does not exist. Each case must be considered individually. The thing, first of all, is that each energy supplying organization offers its services at separate tariffs and offers technical conditions for connection, based on the characteristics of its network.

Thus, the simplest option is the case when your site is located in the city with a finished power line on the street. If at the same time the distance to the power transmission line in a straight line does not exceed 25 meters, then the issue is solved very simply - you do not even need to install additional support. In accordance with the technical conditions, only a simple branch made by a self-supporting insulated wire using special fittings will be enough. In other cases, you can refer to the document, which is known as the decree ...

A thin piezoelectric film on a window pane that absorbs street noise and converts it into energy to charge the phone. Pedestrians on the sidewalks, metro escalators that charge autonomous lighting batteries through piezo transducers. Dense streams of cars on busy roads, generating megawatts of electricity, which is enough for entire cities and towns.

Fantasy? Unfortunately, for now, yes, and this may remain. There is a high probability that the hype around the sensational reports about the wonderful prospects of energy generators on piezoelectric elements will soon end. And we will again dream of a safe, renewable and, to be honest, cheap electric energy received with the involvement of other phenomena. After all, the list of physical effects is remarkably long. The phenomenon of piezoelectricity was discovered ...

Low network voltage is a problem typical for households in the private sector. 160-180 volts - this voltage is not enough for most household appliances and fixtures. Even the simplest incandescent lamp at an excessively low voltage no longer shines, but simply “denotes” its filament with a soft crimson color.

First of all, it should be remembered that the electricity supplier must ensure the quality of this electricity at the input, that is, at the border of responsibility between the subscriber and the supplier. In fact, the boundary of responsibility is most often located at the point of connection of the OHL branch to a private house.

Therefore, the question of fundamental importance is: within whose area of ​​responsibility is the problem? If the voltage on the overhead line itself is as low, then the energy supplying organization is responsible for this ...

If the light in the apartment goes out, the sockets are turned off, or the electric stove ceases to work, then any person who is more or less familiar with electrical engineering goes to the site to check the condition of the circuit breakers in the electrical panel. Most often, troubleshooting is reduced to restarting the machine.

The fact of operation of a modern modular circuit breaker is easily determined: the handle is in the "down" position, a round sign - "zero" is clearly visible on it. To turn it on, simply turn this knob up, then a horizontal line will appear, and we can assume that the mission has been completed.

Many apartments in the post-Soviet space are equipped with guards with automatic machines of a slightly different type. AE series circuit breakers and the like have slightly larger dimensions, are attached to the base with long screws and have an unpleasant property ...

It is better to prepare a sled in the summer, as well as a heating system at home or in a summer house. It is not worth putting off “for later” the solution to this vitally important issue. After all, autumn cold can come suddenly, and it is important that the weather does not take you by surprise.

Homeowners who have gas connected to the house but who have no problems with heating and hot water can close this article and go about their business. This article is for people who want to make the most economical electric heating in the house, but the power allocated to their house (the limit of allowed power) is not enough to connect several heating appliances and other household appliances.

And the purchase of additional electric power from power engineers is not possible due to the unjustifiably high cost or physical absence of excess power due to old transformer substations. What electric heating system is the most ...

After reading this headline, someone might ask, “Why?” Yes, if you simply plug the LED into a power outlet, even turning it on in a certain pattern, it does not have practical value, it will not bring any useful information.

But if you connect the same LED in parallel with a heating element controlled by a temperature regulator, you can visually control the operation of the entire device. Sometimes this indication allows you to get rid of many small problems and troubles.

In the light of what has already been said about the inclusion of LEDs in previous articles, the task seems trivial: just put the limiting resistor of the desired value, and the issue is resolved. But all this is good, if you feed the LED with a rectified constant voltage: as they connected the LED in the forward direction, it remained ...

In some cases, for example, in flashlights or home lighting fixtures, it becomes necessary to adjust the brightness of the glow. It would seem that it’s easier: just change the current through the LED, increasing or decreasing the resistance of the limiting resistor. But in this case, a significant part of the energy will be spent on the limiting resistor, which is completely unacceptable with autonomous power supply from batteries or accumulators.

In addition, the color of the LEDs will change: for example, white when the current is lower than the nominal (for most LEDs 20mA) will have a slightly greenish tint. Such a color change in some cases is completely useless.

Imagine that these LEDs illuminate the screen of a TV or computer monitor. In these cases, PWM control is applied (pulse width) ...

It just so happened that the power supply voltage in villages and towns often does not comply with GOST, and, as a rule, in a smaller direction. Instead of statutory 220 Volts in the outlet, we have less than 200 V. And during periods of mass arrivals of summer residents or when the heaters are cool on the street and electric heaters are turned on, the mains voltage drops even more significantly.

In such a situation, it is important to ensure reliable and safe operation of life support systems at home. To do this, you have to use a network voltage stabilizer - a simple and affordable way to maintain the voltage of a home electrical network within the framework of GOST.

However, if you feed from it all the electrical appliances available in the house, then the power of the device should be very large. Such a stabilizer requires space for installation in a dry, heated room, and it is very expensive ...