Starting January 1, 2011, the household appliances we purchase must have a class designation of energy efficiency. That is, in the passport of the device or on the case, there must be a label of a certain color, with a letter indicating the class of energy efficiency.

The letter A, on a bright green background, marks the equipment with the highest energy efficiency indicator. Marking B, means lower energy efficiency and is shown on a light green background.

The letters C, D, F, G follow and the color scheme changes from green to yellow (D) to bright red (G), showing the lowest energy efficiency. Additional classes also exist. A +, A ++, these are devices whose energy efficiency is higher than that of class A...

The corridor switch is very familiar to older electricians. Now such a device is somewhat forgotten, so you have to briefly talk about the algorithm of its action.

Imagine that you leave a room in a corridor in which there are no windows. Click the switch near the door, and the light in the corridor lights up. This switch is conventionally called the first.

Having reached the opposite end of the corridor, before exiting to the street, you turn off the lights by the second switch located near the exit door. If someone else remains in the room, then he can also turn on the light with the first switch when exiting, and turn off with the help of the second. When you enter the corridor from the street, the light turns on with the second switch, and already in the room turns off the first ...

Surely you know the Veterok heater. By the way, “Veterok” is not a name, but the principle of operation of this device. Like oil or spiral electric heaters (calorifiers), Veterok has a higher efficiency.

An indisputable plus, when using this device, is, of course, its speed. After turning on the heater, it instantly begins to warm the air.

Why is the "Breeze"? The principle of action speaks for itself. A heating element (spiral), a fan, a regulator of heating levels, and a power regulator are mounted in a plastic case with holes for air diffusion.

Using the described construction, it is possible to determine whether or not a mechanism located in another room or building works. Information about the work is the vibration of the mechanism itself. The design is quite simple and contains a minimum of details.

In automation systems, it is often necessary to determine the state of a device or mechanism simply at the “on - off” or “working - not working” level. A fairly real and vivid example is a mini-boiler pump.

The boiler itself with a control device (controller) can be located in one room, and a pump that creates pressure in the heating system in another. How to inform the controller that the pump is turned on and running? ...

TOHow can I check the accuracy of the electricity meter, without the help of specialists.

This article is intended, first of all, for those who, by occupation or by character, need to take care of maximum energy savings.

So, if you see, suspect that your counter does not think correctly, then you should conduct a small investigation within your household.

Naturally, the most accurate answer to the operation of your electric meter will be given in the metrology laboratory. It costs pretty decent money.Therefore, to begin with, it is better to check it on your own ...

Quite often, not very pleasant things happen in the home workshop: the home ones distract you from exciting activities, considering them a waste of time. Therefore, you have to drop everything in a half-step and run to do emergency housework.

If in the process of work a soldering iron and devices powered from the network are used, then in the process of such shoots the doubt often creeps in: “Did I turn off the soldering iron or some heating element with which I was debugging the thermostat?”. Indeed, such forgetfulness often leads to burns, electrical injuries, and even to a fire.

To avoid such doubts, a peculiar time relay is proposed. It can be used with other equipment, for example, with a TV ...

How to protect icing roof

The accumulation of snow and ice on the roof of the house negatively affects the roof - the load on the roof frame increases and its service life is reduced.

As practice shows, almost all spring drops from the ceiling of the room are not caused by damage to the integrity of the roof, but because of the snow, which formed an ice block on the roof.

In the modern world, this problem is solved very simply. It is necessary to provide the roof with a special anti-icing system. Installation of the anti-icing system should be done only in problem areas where ice is constantly appearing, creating a threat of damage to the roof or a collapse of snow and ice ...

The simplest scheme to limit the duration of a call.

As you know, children's pranks are not always safe, and can lead to various unpleasant consequences. Even fairly old people, mostly men, recalling their childhood, often say that it was possible to press the button of someone else's call and rush off to the street. And if at the same time you still tie the door handle to the stair railing or to the neighbor's door!

A normal electromechanical bell is designed for short-term operation, therefore, a match stuck in a button can, if you do not remove it in time, lead to overheating and even fire of the call. There is wallpaper under the bell, a hanger or a closet can be located nearby. Here, not far from the fire ...

Varieties and classification of welding

Welding is the process of obtaining an integral connection of parts due to the formation of interatomic bonds in the weld. Such bonds arise under the influence of local or general heating of the parts to be welded, or under the influence of plastic deformation, or both.

Welding is most often used for joining metals and their alloys, for joining thermoplastics, and even in medicine. But welding live tissue is beyond the scope of this article. Therefore, we briefly consider only those types of welding that are used in technology.

The modern development of welding technology is such that it allows welding to be performed not only in production conditions, but also in the open air and even under water ...

The article describes and experiences the use of various home-made and industrial mini-hydroelectric power stations.

Recently, due to rising electricity tariffs, renewable sources of almost free energy are becoming more and more relevant.

From the well-known classical triad: solar panels, wind generators, hydro generators (HPS), the latter are the most complex. Firstly, they work in aggressive conditions, and secondly, they have maximum operating time for an equal period of time.

When making a homemade hydrogenerator, you need to work harder and choose better materials to ensure its durability ...

LED lamp operating experience

We are living in an era of unbridled and unscrupulous growth in electric tariffs, and while Chubais’s thinking will dominate the economy, the situation will not change.

For example, we can recall that over 10 years, electricity tariffs have increased 20 times. Apparently, this is not the limit. The only way to counter, with the exception of theft, is to save energy.

Just a couple of years ago, everyone was hearing “energy-saving” lamps; conventional luminescent, only with an electronic starting and adjustment device and with the common base E14 and E27 ...

The modern elemental base of electronics greatly simplifies circuitry. Even a normal twilight switch can now be assembled from just three parts.

Quite often, situations arise when, after dark, the inclusion of lighting is required. This may be the entrance to the entrance of the apartment building, the porch and the courtyard of a private household, or simply lighting the house number. This inclusion is usually carried out using a twilight switch.

There are a lot of similar schemes developed, both in amateur and in industrial conditions. Like everything else, these designs have their positive and negative properties. Some of the negative properties are such as the need for an external constant voltage source (+12 V), or the complexity of the circuit ...