A significant part of the organization’s costs in the field of housing and communal services are electricity costs. Let's look at an example of how you can organize one of the measures to save electricity by automating lighting control in classrooms.

Modern lighting control systems allow you to create optimal conditions for the stay, the presence of people, as well as significantly save energy. A very common situation - students and teachers, having spent a lesson in the classroom, constantly forget to turn off the lights after leaving. This raises the problem - how to make sure that after the last person leaves the classroom, the light turns off itself? The aim of our work was to create a computer model of an automated lighting control system in the classroom, which saves energy. An automatic was designed ...

Home automation often starts with the simple, urgent task of controlling lighting. It is often necessary to control the on and off light from different places or from a common remote control or a set of buttons. Moreover, the number of lighting fixtures, rooms, switches is always different. And the control scheme is different from task to task.

In this material we will consider a universal tool for solving such a problem - a freely programmable controller Aries PLC. With this device, you can automate the lighting of almost any complexity. At the same time, intermediate contacts are not needed, switching of electric circuits occurs using built-in electromagnetic relays. The creation of the work algorithm begins with the download of the CoDeSys program. It is free and is included in the scope of delivery of the PLC ...

The issue of generating electricity by alternative methods is quite relevant in our time. One of the options for providing electricity to the house is the installation of a solar power station. This option can be used as an additional alternative source of electricity or as the main one, if there is a task of power supply at home in the absence of the ability to connect to electrical networks, for example, because of their remoteness.

The first stage in the implementation of this idea is the calculation of the future power plant. In this article, we give recommendations that will help to correctly calculate the required power of a future solar power station and correctly assess the possibility of implementing this idea, depending on various factors. First of all, it is necessary to determine what tasks a future power plant should fulfill ...

For the purpose of switching loads in alternating current circuits, it is convenient to use triacs, which are a type of thyristor, but differing from the thyristor by the ability to conduct current in both directions in the open state. The first designs of triacs were already considered in 1963, then, for example, the Mordovian Research Electrotechnical Institute already filed a patent for a symmetric thyristor (Patent SU 349356 A, Dumanevich AN and Evseev Yu.A.), and General Electric was engaged in commercial implementation of the same product called "Triac" in the west.

While the thyristor has a clearly defined cathode, anode, and control electrode, the triac has a cathode and anode interchanged during its operation, depending on the current direction at the current moment.Of course, the signal to the control electrode (gate) of the triac is always supplied relative to a specific conditional cathode, but the current ...

Having started a major overhaul in an apartment or office, we somehow ask ourselves questions about how to better mask the wiring, how and where to lay various cables (power, acoustic, television, telephone, Internet cables, etc.). There are many ways of concealed cable routing: inside the strobes in the wall, in the corrugated tube along the edge of the ceiling or floor, finally you can just leave different wires lying near the baseboard along the wall. Each of these methods differs in its features, but often there are more minuses than pluses.

If we consider standard solutions, such as a strob or corrugated pipe, then the disadvantages are obvious. Installation of wiring inside the wall is associated with high laboriousness, you need to hollow the grooves in the walls, and if you later need to replace the wires for some reason, then until you get to them - you will dissolve the entire finish ...

For the high-quality performance of construction, installation or repair work, only the knowledge of the master is not enough. For even bricklaying, for installing drywall partitions, and even just for deciding new wallpapers, you need to precisely mark up or at least align the elements vertically or horizontally, so that everything works out neatly and evenly.

At all times, builders and installers used a bubble level or plumb to level surfaces, this was always enough for a professional worker, to be honest. But how convenient is it to use a mechanical tool? Maybe it's time to look at the modern achievements of technological progress? In fact, a tool has long been on sale that can not only facilitate marking, but also significantly speed up work. For those who are professionally engaged in construction and installation works, this tool will become indispensable ...

In this article, under the correct operation of lithium-ion batteries, we will understand the observance of such conditions in which the lithium-ion battery of a portable device can work safely, will last a long time, and the functioning of the device will remain full. It will be about lithium-ion batteries, since most modern mobile gadgets: tablets, laptops, smartphones, etc. have lithium batteries installed. And if earlier it was often possible to meet nickel-metal hydride, nickel-cadmium, today lithium is widely used.

With proper use, a lithium-ion battery will last 10-15 times longer than when used haphazardly, which will be described later in the text. Here you will find recommendations for users, compliance with which will help to keep the lithium battery efficient and capacious throughout the entire period of use ...

Smartphone and tablet users, of course, are aware of the explosion hazard of lithium batteries in their gadgets. And striking examples do not have to go far. Recently, for example, Samsung faced a painful problem in person, and was forced to withdraw the first series of the new Note 7, since the batteries exploded right in the process of charging. One way or another, the problem remains the same since the advent of cell phones, ICAO even in 2016 banned the commercial shipment of lithium batteries in the cargo compartments of civilian transport.

The fact is that in the process of charging a lithium battery in a mobile device, using the microcontroller built into the battery, a rather complicated algorithm for implementing this process is implemented so that the battery temperature does not go beyond the acceptable temperature range. The controller monitors battery parameters ...