Take the simplest example: you need to turn on the press 1 second after the operator simultaneously holds the two buttons in the pressed state. Thus, we guarantee that both hands of the operator are busy and give him time to monitor the readiness of the machine. The simplest solution is to connect the contacts of both buttons in series and put an electronic relay with a timer. If the timer allows adjustment of the delay time, then such a scheme will provide some flexibility of the system, but not too high.

Any additional conditions, for example, the requirement to control the sequence of button presses will put us in a difficult situation - we will be forced to change the circuit by introducing additional relays. This is not a difficult problem, provided that such a need arises extremely rarely. But in a competitive production environment, the time it takes for a new product to enter the market is crucial ...

In practice, every electrician is faced with the work of adapters, power supplies, voltage converters. In all these devices, electric capacitors are widely used, which are often called “electrolytes” on slang.

Their main advantage is the relatively large size of the capacitance with a relatively small size. In addition, their production has long been established, and the cost is relatively low.

Any capacitor consists of two plates, the space between which is filled with a dielectric. The electrolytic capacitor differs from all others in that it uses an electrolyte layerfilling the space between the two plates, most often made of foil plates. Moreover, one of them is covered with a small dielectric layer oxide film.Foil Tapes Fold Together ...

The name of this electrical device for 0.4 kV electrical installations contains two fundamental actions: actuation as an electromagnet from the passage of electric current through the coil winding and start-up of the electric motor by power contacts.

Structurally, any magnetic starter consists of a stationary part and a movable armature that moves along the runners. It is highlighted in blue in the picture.

The starter can be very simplified as one button, on the case of which there are terminals with connected power circuits and stationary contacts. A contact bridge is mounted on the moving part. Its purpose: providing a double break of the power circuit to turn off the power of the electric motor and a reliable electrical connection of the incoming and outgoing wires when the circuit is switched on ...

Such a question sometimes arises for novice electricians or apartment owners who are well versed in a set of repair tools, but previously did not particularly delve into the wiring device. And then the moment came when the socket stopped working or the light in the chandelier glows, but I don’t want to call an electrician and there is a great desire to do everything ourselves.

In this case, the primary task of the home master is not to eliminate the malfunction, as it seems at first glance, but to comply with electrical safety rules, eliminating the possibility of falling under the influence of electric current. For some reason, many forget about it, neglecting their health.

All current-carrying parts of the wiring must be reliably insulated, and the contacts of the sockets are hidden deep into the case so that they cannot be accidentally touched by exposed parts of the body ...

A circuit breaker is a low-voltage protective device that protects electrical circuits from emergency operating modes such as overload and short circuit, and also allows manual switching of electrical circuits under load. If the circuit breaker is structurally equipped with a motor-drive, then it can be controlled remotely or automatically by applying a signal from various automatic devices.

Circuit breakers are used quite widely, since the concept of "low-voltage circuits" includes not only power circuits supplying various electrical appliances and equipment, but also communication circuits, telemechanics of equipment, various auxiliary circuits with voltages up to 1000 V. In this article we present the features of choosing automatic circuit breaker by criteria such as the number of poles ...

The graphic editor "Splan" is distributed free of charge, it is known among radio amateurs, electricians and electrical personnel. It is convenient in operation, has an intuitive interface and a large library of templates of electronic components, which can be replenished with your own developments.

To explain the principles of drawing in the program sPlan 7.0, we use a common scheme of an electric lighter, which from a voltage of 2.4 volts from two batteries generates a high-voltage spark discharge pulse to ignite the gas.

This design consists of: an oscillator operating from transistors, a transformer that increases their oscillations to about 150 volts, a high-voltage transformer, which triggers the thyristor circuit. Schematic diagram of an electric lighter ...

For more than two centuries, mankind has been using the energy of chemical reactions between various substances to produce direct current.

The redox reaction occurring between substances with the properties of an oxidizing agent and a reducing agent is accompanied by the release of electrons, the movement of which forms an electric current. However, in order to use its energy, it is necessary to create conditions for the passage of electrons through an external circuit, otherwise it is released into the external environment by simply mixing the oxidizing agent and reducing agent with heat.

Therefore, all chemical current sources have two electrodes: an anode, on which oxidation occurs, and a cathode, which performs the restoration of the substance. Electrodes at a distance are placed in a vessel with an electrolyte - a substance that conducts electric current ...

By drawing is meant the process of creating images of objects with the exact reproduction of their sizes using scale. Drawing electrical circuits requires compliance with GOST symbols adopted to denote each element.

To create a document on a computer, you need software - a graphical editor that converts the manipulation of a PC user on an information input device into a drawing. The created document can be saved electronically by a file and / or printed on paper in a specific format.

You can draw electrical circuits with any available graphic editor. However, special programs adapted for these purposes greatly facilitate routine work and allow the use of already prepared blanks of various elements ...