Today, the opportunity to purchase any item makes the problem of choosing a gift particularly relevant. To make a really good gift, you should devote some time to choosing a gift. How to choose a gift to accurately bring joy to a loved one? Many of us are ready to spend huge sums of money on New Year's presents. But sometimes it turns out that an expensive gift is completely not valuable and not needed for the one who receives it. Therefore, choosing holiday souvenirs, do not forget about the interests and wishes of relatives and friends.

There is a wonderful gift option that will suit any person - this is a gift certificate. Today we cannot know exactly what a friend or girlfriend wants to receive as a present. But you can always roughly determine the sphere of preferences of the birthday man. If you find it difficult to choose a gift, buy a gift certificate ...

In all radio and electronic devices, except transistors and microcircuits, capacitors are used. In some circuits there are more of them, in others less, but there are practically no electronic circuits without capacitors.

In this case, capacitors can perform a variety of tasks in devices. First of all, these are containers in the filters of rectifiers and stabilizers. With the help of capacitors, a signal is transmitted between the amplifier stages, low and high frequency filters are built, time intervals in the time delays are set, and the oscillation frequency in various generators is selected.

Capacitors derive their pedigree from the Leyden jar, which in the middle of the 18th century was used in their experiments by the Dutch scientist Peter van Mushenbruck. He lived in the city of Leiden, so it is easy to guess why this bank was called. Actually, it was an ordinary glass jar ...

The human need for water is very high. In the modern world, it is needed almost everywhere. Therefore, many problems are associated with the problems of water supply, with its correct and safe consumption.

Eternal problems with interruptions in water supply, the need to provide a small farm in the water, the need for a reliable irrigation system of vegetable gardens, gardens, increased pressure in the water supply system are just some of the problems that Russians face. All of them affect the desire of consumers in any way to ensure permanent access to water resources.

Each of the situations comes out differently. However, drilling the own well is considered the best solution to this problem. But in this case, there is a need for the entire water supply system to ensure safety and control its working pressure ...

At night, the presence of a good illumination of the passenger compartment is exactly the same as the presence of air conditioning in the summer heat. And since sometimes the standard backlight is unremarkable, there are methods for its modification.

LED backlighting or LED backlighting will be the best option for a car. It has several advantages over conventional lamps: minimal current consumption, high reliability and durability, low cost of equipment, bright, beautiful glow.

The need for LED light sources has not left the attention of many manufacturers and convenient LED strips have appeared on the market. Often they have an adhesive base, which is very convenient in our case, easily take the desired shape.LED tapes are also divided into two types - some glow in one color, others allow glow in different colors, differently such LEDs are called RGB ...

Having contacted the electrical installation at your own site or in your own apartment, you can very soon notice that the cables and wires used in the installation are mainly copper, less often aluminum. With all the variety, there are simply no other materials. Further, it can be noted that the structure of the cores of these cables also varies: the core can consist of many wires, but it can be whole. The core structure affects the flexibility of the cable, but does not affect its conductivity.

It seems that the spectrum of cable characteristics ends there. But where then is such a variety of brands? VVG, SIP, PVS, ShVVP - how do they differ from each other? For the most part, insulation properties. Let's talk about this in more detail. VVG cable marking means: external insulation from polyvinyl chloride, core insulation - also from polyvinyl chloride, flexible cable conductors. Although the flexibility of the VVG cable is relative ...

Although the price of garlands is low, sometimes there are situations when you have to repair it. And there are not so many opportunities. Next, we will talk about simple methods for repairing a Chinese New Year garland.

Usage and repair tips usually in excess are given on the back of a beautiful packaging box. The process of replacing bulbs is described in great detail, although there are no spare ones in the kit. There are many safety warnings, instructions for using the garland.

One of the wonderful properties of such garlands is that they lay on a shelf until the next New Year, most often they do not want to light up, and they have to be repaired. All the malfunctions of such garlands are reduced to three types: wire breakage, loss of contact in the cartridges, lamp burnout. After the garland is wrinkled, shook, probed all the cartridges, it’s necessary to take matters seriously ...

Everyone is familiar with LEDs now. Without them, modern technology is simply unthinkable. These are LED lights and lamps, an indication of the operating modes of various household appliances, the illumination of screens of computer monitors, televisions, and many other things that you can’t even remember right away. All of these devices contain LEDs in the visible radiation range of various colors: red, green, blue (RGB), yellow, white. Modern technology allows you to get almost any color.

In addition to LEDs in the visible range, there are LEDs for infrared and ultraviolet light. The main field of application of such LEDs is automation and control devices. It is enough to recall the remote control of various household appliances. If the first remote control models were used exclusively for controlling TVs, now they are used to control wall heaters, air conditioners ...

Water supply systems can be controlled and controlled according to various parameters - water level, pressure, temperature. The most common pressure control. One of the simplest and most popular elements of home automation in this case is the pressure switch RM-5.

This relay is designed to control electric pumps to supply water to the house. Using the RM-5 relay, the pump will work clearly in the preset pressure mode. At minimum pressure, the contacts will close and the pump will turn on, and when the maximum pressure is reached, the contacts will open and the pump will turn off.

Pressure switch RM-5 is produced by different manufacturers.Because of this, such relays may have slight differences in the type of housing and the location of the cable connections. There are varieties of this type of pressure switch with integrated pressure gauges ...