Solder is a low-melting metal alloy intended for connecting wires, leads, parts and components by soldering. Previously, solders were designated by three letters - POS (tin-lead solder), followed by a two-digit number showing the tin content in percent, for example POS-40, POS-60.

The best solder is pure tin. However, it is expensive and is used in exceptional cases. During radio installation, tin-lead solders are most often used. By the strength of soldering, they are not inferior to pure tin. Such solders are melted at a temperature of 180 - 200 ° C.

The choice of solder is made depending on such factors: from the metals or alloys being joined, from the brazing method, from the temperature limits, from the size of the parts, from the required mechanical strength, from the corrosion resistance, etc. Soldering with a melting point is used to solder thick wires ...

Soldering iron is the main tool for soldering. The convenience with which you solve the tasks depends on its correct choice. Soldering irons vary in design and power. Rod sticks are available with ceramic and spiral heaters. Soldering irons with spiral heaters are practical and durable, but they warm up for a relatively long time. Ceramic soldering irons heat up much faster, but at the same time require careful use and a very careful attitude, since any blow can damage such a soldering iron.

According to their power, soldering irons can be different. Traditional soldering irons have the following capacities: 3 - 10 W soldering irons are designed for desoldering very small microcircuits, 20 - 40 W soldering irons are considered household and amateur radio, 60 - 100 W soldering irons are used, for example, car service employees use for soldering thick wires, 100 - 250 W soldering irons use for sealing ...

How often do you use electricity? I agree, the question is somewhat strange for a modern person, and one would expect a completely logical answer - all the time, but nevertheless, having enveloped their homes with wire meters, not everyone thinks about alternative sources of electricity. One of such sources under the name "indigirka" will be discussed.

The company "Thermofor" in cooperation with the St. Petersburg company "Crioterm" decided to combine a thermal electric generator with a long-burning furnace, obtaining a solid fuel heating and cooking stove, and thereby giving people the opportunity to reduce their dependence on standard wiring.

The Indigirka stove is the only solid fuel heating and cooking stove in the world that is capable of generating electricity during operation ...

Nowadays, photosensors are most often used to control lighting on the street and in the adjacent area (fromtwilight switches).

The photosensors turn on the light depending on the amount of natural light. Somehow it turned out that everyone had forgotten a little the most popular technical solution relative to the recent past - turning the lights on and off using the daily time switch.

Even before the advent of photoresistors and other photocells, various automatic devices with clockwork were actively used to automate lighting. These devices turned on and off the lights at a predetermined time of day. The principle of operation of these relays was based on the rotation of a software disk with holes ...

Overview of different types of circuit breakers with prices and features

Circuit breakers are present in any modern building, usually they are mounted on a 35mm DIN rail. The exception is the previously widely used black “automatic machines” of the AE series, which are now better not to use, because they are inferior to modern in all respects except the price.

Circuit breakers (automatic machines) are devices for protecting electrical circuits from overloads and short circuit currents.

A critical situation in the electrical circuit occurs when the load is too powerful, or during a short circuit. To understand how the circuit breaker saves in these situations, you need to understand its principle of operation. When the current in the circuit of the machine exceeds the working one by a factor of several, the thermal release is activated ...

Electroconvectors Bravo, Roda SORGE, advantages and disadvantages of convectors, fan heaters, carbon and halogen household heaters.

Despite the fact that the principle of convectors is the same, many models have their own distinctive features. Consider these features on the example of several models of the company RODA. The control of these convectors is electronic, there is an LCD display. These convectors have the following distinctive features that expand the functionality.

In addition to the BRAVO series, RODA also produces convectors in several more series. The simplest is the Roda STANDARD series. These convectors have an electromechanical thermostat, power, depending on the model, is 0.5 - 2.0 kW, they are designed for installation not on the wall ...

Dimmers (dimmers for controlling light) is a miniature device that is installed instead of the usual, standard mechanical switch, which allows you to smoothly adjust the brightness of artificial lighting.

The first, a mechanical dimmer, was invented in the 1890s to slowly darken theater lighting. The superiority of this invention belongs to the inventor - self-taught, an ardent fan of Melpomene from the United States, Granville Woods.

All dimmers are designed to turn on / off the lighting and adjust its intensity. In addition, many models provide other useful features. For example automatic shutdown by timer, imitation of presence, smooth shutdown, remote control ...

Heaters of various types are widely used in apartments and offices, as a rule, as additional heating. The greatest demand for them in the fall, when they do not rush to turn on central heating, and in apartments, especially at night, it becomes very cold. Next, it will be described how to choose a heater, what types of heaters exist, and their application features.

Industrial heaters are designed for round-the-clock operation for a long time. However, they do not require care and prevention, and generally no maintenance, except, except for wiping off dust with a soft cloth. By their design, scope, maintainability, complexity, principle of operation, the number of additional functions, heating devices are very diverse and numerous ...