Of all the methods for connecting an induction motor developed by numerous researchers, in practice two are most often used, called star and triangle methods. Both of them use a capacitor trigger, characterized by an accessible elemental base. The name of each method is given by the method of connecting the stator windings to the network. You can find out how they are assembled in a particular engine using a plate mounted on the body.

Usually, even on older models, you can make out the method of connecting the windings and the mains voltage for which they are created. Such information can be trusted if the engine has already been tested in operation and there are no complaints about it. But, even in this case, it is necessary to conduct electrical measurements. Let's start with a poor version of the installation of stator windings when their ends are not marked at the factory, and the zero assembly for the star circuit is made inside the case ...

A modern person uses a mass of various devices and tools that not only make life easier, but pose a certain risk to health. Manufacturers take into account the possibility of injury, apply design solutions that increase safety of use, install several degrees of protection on their products, but there are always people who manage to violate the rules of operation and as a result receive various injuries.

A few tips outlined in this article should help you maintain your health in the event of unforeseen situations during your home repairs. The hope of "maybe", characteristic of most people, can create a sad situation. As soon as a new, unfamiliar tool is in your hands, be sure to understand the rules for safe working with it. Only after that can its controls be studied ...

Let's look at the design and purpose of solderless breadboards. What is their advantage over other types of assembly, and how to work with them, as well as what schemes you can quickly assemble for a beginner.

The first problem that a radio amateur faces is not even the lack of theoretical knowledge, but the lack of tools and knowledge about how to install electronic devices. If you do not know how this or that part works, this will not prevent you from connecting it according to the circuit diagram, but in order to clearly and efficiently assemble the circuit, you need a printed circuit board. Most often they are made using the LUT method, but not everyone has a laser printer. Our fathers and grandfathers painted boards manually with nail polish or paint, and then they were etched. Here the novice is overtaken by a second problem - the lack of etching reagents ...

Sometimes it happens that although all the lights in the room are intact, the light suddenly goes out in one of the rooms, or some kind of working appliance that seems to be working, or one of the switches starts to fail, etc. Here, one has to resort to the so-called “ringing” procedure, that is, it is necessary to somehow check the integrity of some conductors.

The conductor could be damaged during repair work, the junction could burn out due to overload in poor installation conditions, but for some reason there could be a break in the core ... Often in such cases we encounter a situation where we find mixed up wires inside the soldering box on the wall labeled wires and twists wound with tape wrapped in tape.What to do, because it is necessary to check all the cores, identify a break, fix the malfunction, and the wires are mixed up? After - of course we mark the wires ...

Builders, fitters, electricians and electronics engineers often have to determine the temperature or heat leakage, this can be done using various thermometers and thermocouples, but in some cases it is either long, or inconvenient, or even impossible. Then a thermal imager comes to the rescue - a device for visual monitoring of the temperature of a body, object or structure.

On its body there is a screen on which information from the bolometric matrix is ​​displayed. The last analogue of the camera’s matrix, only working in the infrared range (wavelength above 740 nM). This allows you to "See" how much the body is heated. An interesting portable representative of such a device is the Seek Thermal Compact. Often thermal imagers resemble a pistol with a short "barrel".This screen displays a picture in which colors from shades of blue to redtemperature values ​​are displayed...

A triac is a type of thyristor. He, like the Trinistor, has three conclusions, but the triac pn junctions are not three, but five. Two stable states, “open” and “closed,” are also characteristic of a triac: at the same time, the conductivity of the triac can be controlled in two directions, despite the fact that it has only one control electrode.

Due to its versatility, it is the triac most often plays the role of a key in AC circuits for controlling various kinds of devices (for example, the engine of a grinder or a washing machine). Take a look at the drawing. There are five transitions, which in their location are similar to two on-parallel connected trinistors. If you attach plus to the electrode MT2, and minus to MT1, then it is activated(ready to go) transition sequence bottom-up n-p-n-p, and when you change the polarity at our disposal will fall...

The platform for fans of robotics and automation Arduino is famous for its modular design and ease of operation. Sometimes I come across an advertisement where they say that you can assemble your robot without practically being familiar with electronics. But it is not so. If some actuators and mechanisms are incorrectly connected, you can burn the ports of the arduino. And if you do not know how to handle digital devices - at best you simply will not be able to establish a connection.

To learn about the features of the connection, power supply voltages, logic levels, etc. you need to familiarize yourself with the datasheet on your module. Datasheet or datasheet is the technical documentation for the product. Such documentation can be downloaded to any chip or sensor. Usually they are on the manufacturer’s website. Moreover, there are special resources on the network ...

In most automation circuits and control circuits, limit switches are used - this is an apparatus for switching an electric circuit through the action of an actuator on it. They are sometimes called limit switches. They are used in automatic electric drive devices, burglar alarm systems and other devices. We will consider a typical application in this article, we will begin from simple to complex.

I decided to start the article with what most ordinary people saw. If few people work with lathes, elevators and hoisting cranes, then everyone faced cars. The first thing that comes to mind is the limit switch, signaling an open door. In classic domestic cars, it was used to turn on interior lighting (ceiling lamp) ...