By acquiring property in the secondary market, we are always at risk. Two famous market fools from the saying - the seller and the buyer - are constantly trying to get the most out of the deal. Of course, the benefit is possible only at the expense of a vis-à-vis: the seller suddenly forgets about some of the shortcomings of the goods, and the buyer diligently knocks down the price, hoping to get a worthwhile item for nothing.

And the more expensive the acquired property, the sharper the hidden conflict of interests between the seller and the buyer, the more irresistible the desire to deceive the neighbor becomes and the higher the price of the error. Therefore, the situation becomes extremely extreme if the subject of bargaining is real estate. For example, if an apartment is for sale, then the buyer does not have the opportunity to find out all its flaws for certain. Let's say it's summer in the yard, and in the winter it turns out ...

A theoretical and practical guide for those who decide to install a voltage regulator in their home.

A simple layman entering a query on voltage stabilizers in a search engine immediately stumbles upon eulogies and abusive speeches of all brands, a bunch of countries of producers.

This massive confusion is understandable - high competition does not tolerate sitting out of pants with calls waiting, you need to spin as actively as possible, but the impression is of mass uniformity of all stabilizers, where the buyer is essentially presented only with a choice in price and appearance of the device. And this is not at all true. The main thing in the voltage regulator is its functional filling, its operating range, quality and type of execution. This work is devoted precisely to a detailed separation of the types of voltage stabilizers for the correct choice of nominal and type of stabilizer ...

Soldering is the process of joining parts by introducing molten material between them - solder, the temperature of which, as a rule, is lower than the melting temperature of the parts being joined. The purpose of soldering is to obtain a mechanical connection or electrical contact. Further, the article will mainly deal with the soldering of electronic components.

The soldering of metals was used in ancient times. It is believed that this technological operation has existed for at least 5000 years. Even when humanity did not know iron and steel, copper, gold and their alloys became widespread. But even then, master chasers used the connection of parts of products using soldering. Archaeologists have found gold vessels, the handles of which were soldered with gold, as well as alloys of gold and silver. Gold items with traces of soldering were found during excavations of the tombs of the ancient state of Babylon. Scientists dated finds 3200 BC ...

In the process of automation of technological processes for controlling mechanisms and assemblies, one has to deal with measurements of various physical quantities. It can be temperature, pressure and flow rate of a liquid or gas, rotation speed, light intensity, information about the position of parts of mechanisms, and much more. This information is obtained using sensors. Here, first about the position of the parts of the mechanisms.

The simplest sensor is a normal mechanical contact: the door was opened - the contact opened, closed - closed. Such a simple sensor, as well as the above algorithm of operation, is often used in burglar alarms. For a mechanism with translational movement, which has two positions, for example, a water valve, two contacts are needed: one contact is closed - the valve is closed, the other is closed - closed.A more complex translational algorithm has a mechanism ...

Recently, more and more various video tutorials have appeared on the Internet for independent study of various issues that are useful for life and work. Among a large number of substandard things, very valuable author’s courses, techniques, and practical cases are sometimes found. A lot of this kind of products are released for people whose work is connected with the Internet.

Unlike other areas of human activity, there are practically no courses for people interested in electrical engineering and electronics. The pioneer in this matter in our niche was Mikhail Vanyushin with his two parts of the training video course "Into the world of electricity - as for the first time." Relatively recently, a video course on teaching microcontroller programming by Maxim Selivanov has appeared. But in both cases, these are the basics of electrical engineering, electronics and microprocessor technology ...

The beginning of the 19th century. The Golden Age of Physics and Electrical Engineering. In 1834, the French watchmaker Jean-Charles Peltier placed a drop of water between the bismuth and antimony electrodes, and then passed an electric current through the circuit. To his amazement, he saw that the drop had suddenly frozen.

The thermal effect of electric current on the conductors was known, but the opposite effect was akin to magic. You can understand the feelings of Peltier: this phenomenon at the junction of two different areas of physics - thermodynamics and electricity, causes a sense of wonder today.

The cooling problem was not as acute as it is today. Therefore, the Peltier effect was addressed only after almost two centuries, when electronic devices appeared, for the operation of which miniature cooling systems were required. The advantage of Peltier cooling elements is their small dimensions ...

In addition to white LED stripsdescribed in a previous article tapes with color LEDs are also available. Currently, it is only 4 colors: red, blue, green and yellow. The LED housings are the same as in the white tapes. Colored ribbons are used mainly for decorative lighting, modding of computer cases and cars, as well as at discos and other entertainment events.

Usually they are called RGB tapes. Each LED of such a tape is an assembly of red, blue and green LEDs. RGB tape has 4 pins. One conclusion is common and three separate conclusions for each color.

According to the laws of physics, from these colors you can get the whole gamut of shades. This is how colors appear on the TV screen. Naturally, to control such a tape you will need ...

LED strips can be seen almost everywhere. A car is driving, and in its headlights LEDs are brightly lit. Motorists affectionately call such a backlight "cilia." The purpose of such a backlight is daytime running lights, this is a requirement of car inspection, and not the desire of the car owner to decorate his car. Such lights are much more economical and more durable than incandescent lamps used in headlights. However, if you want to decorate your car, you can use the colored ribbon, gluing it wherever your heart desires.

You go to the store, there are also LEDs everywhere: the goods on the windows are highlighted, various cabinets are also indicated by luminous stripes. Even street advertising is highlighted with LED strips. And no one soldered these LEDs one at a time, everything is already soldered to us. In domestic conditions, LED strip can also be used. This is the illumination of ceilings, aquariums, cabinets ...