The modern elemental base of electronics greatly simplifies circuitry. Even a normal twilight switch can now be assembled from just three parts.

Quite often, situations arise when, after dark, the inclusion of lighting is required. This may be the entrance to the entrance of the apartment building, the porch and the courtyard of a private household, or simply lighting the house number. This inclusion is usually carried out using a twilight switch.

There are a lot of similar schemes developed, both in amateur and in industrial conditions. Like everything else, these designs have their positive and negative properties. Some of the negative properties are such as the need for an external constant voltage source (+12 V), or the complexity of the circuit ...

Cable heating: from underfloor heating to roofs without icicles.

Recently, cable electrical heating systems are finding wider application. The range of applications of such systems is becoming wider, their use is more economical, reliable and efficient. More recently, the scope of the heating cable was limited, perhaps, to the installation of underfloor heating.

Currently, the assortment of heating cables and even thermofilms has become much more extensive, which allowed heating anything you like, from water pipes to roofs of buildings. But first, remember how it all began. The history of the development of the warm floor is rooted in the distant past and dates back several centuries, even if not millennia ...

Who deceives a consumer or an electricity supplier, or how suppliers make money for us in excess of the electricity consumed.

I think most of us fell into such a situation when representatives from electrical household organizations came to allegedly check electricity meters, but at the same time, they offered their services, illegal, of course: “wind the meter back” in exchange for the nth amount, and the difference is false electricity to pay on receipt, citing new evidence.

So, about 5 years ago there was a case. Electricians came and offered their services. I figured, well, it seems to be profitable, and then there were problems with money ...

The article provides simple rules that must be observed when using electricity in everyday life.

Electricity has long and firmly entered our lives. Modern man cannot even imagine his life without electric energy. The discovery of electricity brought a lot of amenities and useful appliances to our daily lives. Electricity has penetrated into all spheres of human life.

Behind the seeming simplicity and harmlessness of electrical energy is a great threat to human life and health if it forgets about the basic precautions and safe operation of electrical networks and household appliances ...

Classification of grounding systems of electrical installations and modernization of apartment wiring. Application Experience.

For proper repair or modernization of wiring, you need to know exactly which grounding system is applied at the facility. Your safety depends on this, in addition, it is important when drawing up a reconstruction project. In some cases, for example, a three-core cable is used, and in others four and five-core cable.

The International Electrotechnical Commission and, with its submission, the 7th edition of the PUE (Electrical Installation Rules) distinguish 3 grounding systems and several of their subsystems. 1. TN system (subsystems TN-C, TN-S, TN-C-S); 2. TT system; 3. IT system ...

Theory, practice, the current model of a wind generator and its industrial analogues with a description and price.

For those who often travels and stops for days and nights out in nature, it probably occurred to me that it would be nice to have a recharge source for a car battery and batteries of other mobile devices: laptops, phones, gps navigators, lights, etc.

In addition, having a sufficiently powerful energy source of even 12 V, you can use a 12 - 220 V converter to get a full-fledged 220 V socket. This will further increase the level of comfort that all citizens are used to and increase the number of devices used to the usual level ...

When the question arises of the choice of a welding machine, then the eyes run up from all sorts of options and models. How to choose exactly what you need?

Let's see what's inside the welding machine. We will focus on electric welding, as there are gas welding machines, but for domestic needs and gardening with a cottage, an electric welding machine is best.

Electric welding machines are made on the basis of a step-down transformer with a broken magnetic circuit, in them the regulation of the welding current is achieved by adjusting the gap in the magnetic core of the transformer ...

Did Andre Marie Ampere, James Maxwell and Michael Faraday suggest that their discoveries would be used in the beauty industry in three hundred years? So, let's see what science offers us in this direction.

High-voltage galvanotherapy is used in non-surgical practice of rejuvenation. This technique uses direct current pulses.

Negatively charged interstitial fluid and plasma proteins are attracted to positively charged electrodes applied to the skin. This stimulates blood circulation, which reduces swelling on the face. The procedure is safe, but unpleasant to the senses. In addition, it has contraindications, which are important to remember ...