Any signal that is transmitted wirelessly may attenuate due to various obstacles in its path and other factors. In this regard, interference appears that especially affects analog communication. To ensure stable television reception, signal amplifiers of TV antennas are used.

The television signal is transmitted mainly in the decimeter range (the so-called UHF). It can be analog or digital. Analog TV is fading away every year, and broadcasters and consumers increasingly prefer a digital signal. It is more resistant to interference and allows you to transfer a picture of better quality. Digital cable and terrestrial television standards are labeled DVB-T or DVB-T2. The signal quality is determined by the level of reception at the consumer, measured in decibels dB (dB). A repeater is what the people call a television tower. And the farther the repeater is from the receiver ...

Fluorescent lamps cannot work directly from a 220V network. To ignite them, you need to create a high voltage pulse, and before that heat their spirals. To do this, use ballasts. They are of two types - electromagnetic and electronic. In this article we will consider electronic ballasts for fluorescent lamps, what is who and how they work.

Fluorescent lamp is this gas-discharge light source. It consists of a tube-shaped flask filled with mercury vapor. At the edges of the bulb are spirals. Accordingly, on each edge of the flask is a pair of contacts - these are the conclusions of the spiral. The operation of such a lamp is based on the luminescence of gases when an electric current flows through it. But the current just between the two metal spirals (electrodes) just does not flow. For this, a discharge must occur between them, such a discharge is called smoldering ...

The humidity in the bathroom is always high, and after you bathe you need to dry a towel. Towel dryers are used for this. If you have a classic “water” heated towel rail, you are familiar with the problem when it also gets cold with the end of the heating season. You have to take towels to the balcony, and this is not always convenient and not always possible, and not everyone has balconies.

To dry things and towels in the bathroom all year round, you need to install an electric heated towel rail. In addition to the main task, drying fabrics, these devices are also used as a source of additional room heating. Let's figure out what they are and how to connect it correctly. Still, the choice of a heated towel rail is based on its technical and functional characteristics.. In addition to drying clothes and towels, it can be used ...

Hot water supply of a house or apartment can be centralized, or it can be individual. Even if you have a centralized hot water supply system, you should take care of a backup solution in case of its termination. There are several ways to solve this problem: installation of a water-heating gas column. It requires coordination with a gas supply organization, hoods, the installation of a storage water heater. Great solution, low power consumption. They usually have TENs of 1-3 kW, which will allow them to be connected in an apartment with a standard amount of allocated power (about 3.5 kW in Khrushchev).

But there is a huge drawback - the storage water heater itself is not heavy (20-30 kg), but depending on the model, it can accumulate from several tens to several hundred liters of water. This can cause problems in the installation of such a heater, for example, in an old brick or wooden house ...

All modern computers use ATX power supplies. Previously, AT standard power supplies were used, they did not have the ability to remotely start a computer and some circuitry solutions. The introduction of the new standard was associated with the release of new motherboards. Computer technology is rapidly developing and developing, so there was a need to improve and expand motherboards. Since 2001, this standard was introduced. Let's look at how the ATX computer power supply works.

First, take a look at the picture, all the nodes of the power supply are signed on it, then we will briefly consider their purpose. At the input of the power supply there is an electromagnetic interference filter from the inductor and capacitance. In cheap power supplies it may not be. The filter is needed to suppress interference in the power network resulting from the operation of a switching power supply.All switching power supplies can degrade the power supply ...

According to some analysts, in the coming years, a serious transport revolution awaits humanity: cars driven by people driving will be a thing of the past, and unmanned cars will fill the roads instead. Surprised?

There is nothing unusual here. Indeed, if you take a closer look, the first steps have already been taken today: Tesla electric vehicles, for example, use a very efficient computer driver assistant that can keep the car moving in its lane, at a speed suitable for the current traffic situation, and even able to readjust itself on command. And all this is ensured thanks to the joint work of several electronic components: ultrasound helps to recognize the presence of other cars on the road, neither rain nor fog are scary to the front radar, and a separate video camera carefully reads ...

The electric equipment of a car includes devices that generate, transmit and consume electricity, and are installed on this vehicle.

The electrical system of a car is a combination of devices, devices, circuits, wiring, which ensures the correct and reliable operation of the engine, transmission, chassis, and also contributes to the safety of the vehicle on the road, and allows you to automate some work processes, while creating comfortable conditions for both passengers, and for drivers, and even for other road users. On-board consumers of electricity are often powered by constant voltage. The first electrified cars had an on-board network of 6 volts, the current cars have 12 volts on board, and heavy trucks and diesel buses ...

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 both with the design features of the engines and with the parameters of the supply voltage ...