There are several different types of electrical switchboards, each of which has its own design features and scope. In this article, we give a brief description and purpose of the existing types of shields.

According to the installation method, switchboards are of three types: overhead, built-in and floor. Overhead shields are mounted directly on a wall, support or other building construction. The main distinguishing feature of the shields of this type is that its entire body is located outside. Built-in shields are mounted in a pre-prepared recess in the wall. Thus, only the lid is visible from the outside, and the entire body is recessed into the wall. The floor guard is installed directly on the floor surface or mounted on a special stand. As for the installation location, in this case ...

For beginners, electronics engineers, it is important to understand how the parts work, how they are drawn on the circuit and how to understand the circuit diagram. To do this, you first need to familiarize yourself with the principle of the operation of the elements, and how to read the electronics circuits I will tell in this article on examples of popular devices for beginners.

A diagram is a diagram in which, with the help of certain symbols, the details of a diagram are depicted, lines are their connections. Moreover, if the lines intersect, then there is no contact between these conductors, and if there is a point at the intersection, this is the junction of several conductors. In addition to icons and lines, the diagram depicts letter symbols. All designations are standardized, each country has its own standards, for example, in Russia they adhere to the standard GOST 2.710-81. Schemes do not always read from left to right and from top to bottom ...

Of course, any charger in the course of its work, at least a little, but it must be warmed up, here it’s enough to recall the Joule-Lenz law, indicating that if current flows through the conductor, then heating of this conductor will be observed, if of course we are talking about a real conductor, for example about the same copper, or about the semiconductor from which diodes and transistors are made.

Even the most ordinary wires, one way or another from the current, are always slightly warmed up. But some chargers sometimes get hot beyond measure. Let's try to figure out why this happens. In the case of current chargers, the reason for their heating or overheating is not only in Joule heat. Any modern mains charger is, first of all, a step-down pulse converter. And in the step-down pulse converter there is, firstly, a pulse transformer ...

It happens that the network power supply of some portable device burns out, and we have to flee urgently to the store in order to buy a new one. But how to determine if the power supply offered in the store is compatible with our device? Will it fit, will it not harm the device, will it burn it, will it pull, will it burn itself? So the question is about choosing the most suitable power supply.

We can talk about a charger for a tablet, a power supply for a router, laptop or printer, for a scanner or monitor, for a game console or for anything else, up to an automatic apparatus for measuring blood pressure. It is not enough today in our everyday life of devices with external power supplies (usually direct current) that are plugged into an outlet. The first step is to find the voltage information that your device needs.It is measured in volts and is indicated 24 V, 12 V, 5V ...

Mark Hendershot's father, Leicester Hendershot, was an inventor. He has succeeded more than once in his many attempts to create practical things. Lester made electronic toys, and even sold some of his ideas to small industries. But his main idea was so revolutionary that it confused the country's largest scientists, because they still could not substantiate it. And if this idea were improved, then it would eliminate the need for many utilities, completely changing most of the concepts that were relevant at that time.

The first invention of Lester Hendershot from this area was called the “motor” in newspapers, but in fact it was a generator powered by Earth’s magnetic field. Later models created enough electricity to power a 120 volt light bulb and a desktop radio at the same time. The inventor’s son witnessed this energy ...

The most energy-efficient artificial lighting technology to date is LED lighting. And since LEDs are capricious, they need special power. You can’t just turn on and turn on the LEDs to the outlet, and if it looks like this, then most likely there is a converter for the mains voltage to the required low constant voltage, but it is hidden inside the base part, say, of an LED lamp.

However, we do not always deal with an LED lamp, sometimes it is necessary to connect single LEDs or an LED strip, so choosing a power supply for LEDs for someone can become quite an urgent task. Let’s figure out what’s happening in this article. A correctly selected power supply for LEDs is the key to high-quality and reliable lighting. And since the LEDs need constant current, the mains voltage must first be converted ...

Imagine what the modern world would be like if all electric motors suddenly disappeared from it. Suppose we would replace them with heat engines. But heat engines are bulky, emit steam and exhaust gases, while electric motors of comparable power are compact, fit perfectly on machines, electric vehicles, and other equipment, while being environmentally friendly, economical, and reliable. It is impossible to imagine the modern world without electric motors, greatly facilitating the work of people, in short, making our life more comfortable.

Thanks to electric motors, we get mechanical energy from electrical energy. And weight and size characteristics, power and the number of revolutions per minute are of decisive importance in this process, which in turn are associated with both the design features of the engines and the parameters of the supply voltage ...

It is necessary to consider this topic from magnetic starters from representatives of the Soviet era. Bright representatives are PML and the like. Starters are used to switch a powerful load with a control signal with a small current. The control signal is supplied to the coil, which creates a magnetic field. It, in turn, creates a force on the magnetic circuit, which is mechanically connected with moving power contacts and block contacts.

The magnetic starter can be divided into two parts: upper and lower. In the lower part there is a coil and a fixed part of the magnetic circuit, terminal terminals of the coil. The upper part of the starter contains: a set of contacts, a moving part of the magnetic circuit with a return spring.It is needed to open the contacts, when voltage is not applied to the coil, the contacts return normal position. On many copies it is located ...