Many of us know about the Internet of Things (IoT - Internet of Things) firsthand, someone believes that the Internet is in full swing over the world, and some consider this idea a great exaggeration and generally too ambitious. How are things really? Is it possible to somehow verify these allegations, to verify their validity or to refute?

In fact, this article was written to make sure that the IoT applications already running in the world are numerous and diverse. We will consider real examples from a dozen areas of everyday life of a modern person, in which the Internet of things has long been working. Already today, IoT applications help us make life more comfortable and secure. There are a large number of products embedded in the Smart Home system. Among them: intelligent thermostats and air conditioners, speakers, smart sockets, smoke and motion sensors, open door sensors ...

When acquiring a diesel generator for one purpose or another, it is important to understand the principle of its operation, because if you don’t understand what you are dealing with, you can accidentally lose sight of the symptoms of malfunctions and simply violate the operating rules of this unit.

The most common diesel generator (which is suitable for a home or a small enterprise as a source of backup power supply) consists of several main units installed inside the frame, often protected by a noise-absorbing casing: a fuel tank, a diesel engine, a manual starter, an electronic automatic control and voltage stabilization unit , alternator (directly alternator), battery with charger. In addition, engine lubrication and cooling systems, as well as an exhaust system, are implemented within the diesel generator frame. The principle of electricity production in this type of generator is based ...

When we make repairs and the wire of the drill or grinder turns out to be short, the usual extension cord comes to the rescue. It can be just a long two-wire cable with a single outlet on one end and with a plug on the other. Another popular household option is a round three-outlet extension cord, combining a reel for storing wires and three sockets - a classic of the 90s.

Previously, such an extension cord could be found in almost any apartment. However, devices of this plan are very primitive. In fact, they are designed to physically increase the length of the wire of the appliance if it does not reach the nearest wall outlet, nothing more. A tee, a two-wire wire, a plug - that's the whole extension cord. The surge protector is a more complicated thing. With the widespread use of personal computers, it became necessary to have several outlets at the same time near the desktop ...

In 2008, the Japanese company Ushio, specializing in the manufacture of lighting equipment, first proposed the idea of ​​creating LED lamps that would be as close as possible to classic incandescent lamps. The innovation was called “Filament Led”, because the word “filament” in translation from English means “filament”.

Bulbs of this type are colloquially called "filament" or "LED incandescent lamps," although in reality they are just LED lamps, just the LEDs in them are very small, specially designed for this particular technical solution.The idea of ​​creating this type of LED lamps was born out of a need for decorative lighting. At first, these were not very bright lamps; their luminous flux would not be enough to ensure full lighting ...

The modern electrochemical industry boasts a wide variety of electrical insulating materials. Glass fiber materials, which include synthetic resins, deserve special attention, since these materials are not only highly electric, but also have significant mechanical strength, as well as heat and moisture resistance.

Natural electrical insulating materials, such as mica and asbestos, artificial counterparts - electric cardboard and cotton tapes - share the market for modern electrical insulation with high-quality fiberglass, which is part of fiberglass fabrics, fiberglass, fiberglass and fiberglass. In addition, synthetic films are widely used: melinex, lavsan and others. It is thanks to the appearance of synthetics in the composition of electrical insulation materials, power and durability of modern equipment...

The advent of integrated circuits has made a real technological revolution in the electronics and IT industry. It would seem that only a few decades ago, for simple electronic calculations, huge tube computers were used, occupying several rooms and even entire buildings.

These computers contained many thousands of electronic lamps, which required colossal electric powers and special cooling systems for their work. Today, they are replaced by computers on integrated circuits. In fact, an integrated circuit is an assembly of many microscopic-sized semiconductor components placed on a substrate and packed in a miniature case. One modern human-sized chip can contain several million diodes, transistors, resistors, connecting conductors, and other components inside ...

In a normally functioning three-phase network, the line voltages (voltages between each pair of phase conductors) are equal in magnitude and differ in phase by 120 degrees. Accordingly, phase voltages (voltages between each phase conductor and a neutral conductor) are equal in magnitude and have similar phase differences.

As follows from the above, the phase angles between these voltages are equal to each other. This is called the "symmetric three-phase voltage system." If you connect a symmetrical load to such a network, that is, a three-phase load at which the currents of each phase are equal in magnitude and phase, then such a load will create a symmetrical system of currents (with the same phase angle between them). This is possible provided that in all three phases of the load there are identical reactive and active resistances ...

A digital microscope, like a conventional microscope, is used to optically magnify small objects that a person cannot see with the naked eye. However, unlike a conventional microscope, a digital microscope allows you to view magnified objects directly on a computer monitor or on your own LCD display.

A digital microscope, being a desktop or portable device of a small size, perfectly conveys the boundaries, color and shape of the object being studied, as well as its smallest elements (depending on the characteristics of a particular device).In practice, an image of a small object of interest can be obtained digitally in several ways. Most often this is realized by shooting with a digital camera. In the best (and expensive) case, the device includes a microscope, an optical adapter, a digital camera and special software ...