The main types of lighting switches: control switches, illuminated switches, dimmers, anti-vandal switches. The main advantages of using various models of switches.

Manufacturers of electrical products, despite the seeming limited functionality, offer a modern consumer a variety of models for the capabilities and structure of lighting switches. It is enough to pay attention to single-key, two-key or three-key options. If you look at the western market, then there we will not see a model with more than three keys.

If necessary, Europeans combine several devices of the same type with one frame. In the eastern market, the situation is different ...

Modern technology and practice of manufacturing grounding systems

The grounding device is an important element of the system for protecting people from electric shock. Therefore, it is necessary to pay due attention to the issue of manufacturing grounding at the project stage.

A grounding device can be manufactured in many ways, the criterion for choosing a specific one is to provide the desired resistance (8 Ohms for 220V, 4 Ohms for 380V) and stability of parameters throughout the entire operation period.

The instability of the grounding properties is caused by a change in the resistance of the soil, when the external temperature (winter / summer) changes and the corrosion of the grounding elements ...

Modern methods of zoning and floor plans can no longer do with just one chandelier. Now there are many ways to divide a room into zones, including the use of spotlights.

Spotlights are screwed into the ceiling panels. This method of zoning has long ceased to be an innovation, and in Europe it is already a common thing in the interior.

Spotlights calculated on the voltage 220 andwhether 12 volt. To connect low-voltage lamps, you must use a special transformer. To extend the lamp life use electronic soft starters ...

For most people, home is the place where the main, most enjoyable part of their life goes. A house is not just walls and a roof, it is children and a loved one, it is holidays and meetings with friends, it is priceless memories, the person’s inner, personal world, hidden from others. And how do you want to completely protect your home from any troubles.

We put reliable locks and strong doors from burglars, fire and security alarms, ask neighbors to look after the house if we leave somewhere.

There are no trifles on security. And electrical safety is one of the guarantors of the safety of your property and your life ...

A story about JK trigger and simple experiments to study his work.

In the previous parts of the article, triggers such as RS and D were described. This story will be incomplete if we do not mention the JK trigger. Like the D trigger, it has extended input logic.

In the 155 series, this is a K155TV1 chip manufactured in the DIP-14 package. Its pinout, or as they say now, the pinout (from the English PIN - pin) is shown in Figure 1a. Foreign analogues SN7472N, SN7472J.

The K155TV1 trigger has direct and inverse outputs. In the figure, these are conclusions 8 and 6, respectively. Their purpose is the same as for the previously considered triggers of type D and RS. Inverse exit begins in a small circle ...

The abbreviation LED is derived from the English phrase Light Emitting Diode, which means a diode that emits light. In other words, an LED is a semiconductor device that converts the electric current passing through it into light radiation.

The main element of the LED is an artificial semiconductor crystal. It comes in red, yellow, green and blue. This part is placed in a copper or aluminum cup, which also acts as a reflector and cathode. A golden thread is welded to the crystal, which serves as the anode. It is all filled with a transparent compound and give it the necessary shape. To ensure stable operation ...

Everyone who has a cat knows that these animals are distinguished by both individual character and a variety of quirks and whims.

One of the most dangerous quirks is the desire of cats to chew, bite, catch cords and wires, especially thin wires leading to modern household appliances.

Avoiding this behavior is challenging, requiring both ingenuity and perseverance. And the question here is not so much about the safety of household appliances, but about how to avoid the terrible consequences of an electric shock of your overly playful pet.

Just as parents make a house safe for their child, so cat owners should think about how to protect the house for the cat and from the cat ...

The article describes the D-trigger, its operation in various modes, a simple and intuitive technique for studying the principle of action.

In the previous part of the article, the study of triggers began. The RS trigger is considered the simplest in this family, which was described in the seventh part of the article.

D and JK triggers are more widely used in electronics devices. According to the meaning of the action, they, like the RS trigger, are also devices with two stable states at the output, but they have a more complex logic of the input signals.

It should be noted that all of the above will be true not only for K155 series microcircuits, but also for other series of logical microcircuits, for example, K561 and K176. All logic chips also work exactly ...