Electrician. Schemes, articles of the Free Technical Library

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Free library / Schemes of radio-electronic and electrical devices

Electrician. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Electrician

We recommend reading in our Free Technical Library:

Vertical antenna for low bands

HF Antenna Section. In my version, the mast has a height of 16,8 m and is assembled from four pipes with a diameter of 55 mm (from the antenna mast of the R-401 radio station), three pipes with a diameter of 40 mm and one with a diameter of 32 mm. All pipes fit well together. Used four tiers of nylon stretch marks. The mast is lifted by a lift from R-401. The hoist together with the mast is mounted on an insulator (plate made of thick fiberglass). The insulator with the help of steel corners is fixed on a concrete slab measuring 50x50x8 cm (these slabs line the footpaths). This slab lies on the flat roof of the house and is filled with resin around the entire perimeter. Two capacitive load wires are made of a steel cable with a diameter of 2,5 mm and a length of 8,5 mm and are part of the braces of the upper tier ... >>

Scheme, pinout (pinout) of Siemens S25/C/M/S35 cable

Section Mobile communications. The idea to solder a cable to connect the phone to the computer came to me only with the third mobile device. That is, theoretically, I could tie my first S10 Active to the PC. However, better late than never. After another upgrade (this time from C25 to S25) I found out that there is a lot of software with which you can combine the capabilities of two devices - a PC and a mobile phone. Of course, most of them work fine through the infrared port, but I don’t have a laptop, and by that time I hadn’t made an infrared eye yet. But most of all, in a cable connection, I was attracted by the opportunity to independently change the firmware in the device ... >>

Device for checking telephone sets

Section Telephony. If the performance of the telephone is in doubt, you can, of course, delve into it without disconnecting from the subscriber line and using the signals supplied by the PBX to check the nodes of the device. But this raises a number of problems. Many modern PBXs block the line if dialing is not started within a minute after picking up the handset, and the frequent repetition of this situation may cause claims from the technical services of the station. And with the introduction of time-based payment for calls, it can be very expensive to occupy a line for a long time to check and repair the device. The proposed device will help to find and troubleshoot the telephone without connecting it to the oval line ... >>

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Latest news of science and technology, new electronics:

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

New method for creating powerful batteries 08.05.2024

With the development of technology and the expanding use of electronics, the issue of creating efficient and safe energy sources is becoming increasingly urgent. Researchers at the University of Queensland have unveiled a new approach to creating high-power zinc-based batteries that could change the landscape of the energy industry. One of the main problems with traditional water-based rechargeable batteries was their low voltage, which limited their use in modern devices. But thanks to a new method developed by scientists, this drawback has been successfully overcome. As part of their research, scientists turned to a special organic compound - catechol. It turned out to be an important component that can improve battery stability and increase its efficiency. This approach has led to a significant increase in the voltage of zinc-ion batteries, making them more competitive. According to scientists, such batteries have several advantages. They have b ... >>

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Random news from the Archive

Computer mice can detect emotional stress 30.04.2016

The Japanese company Alps Electric presented a miniature sensor for determining the level of hemoglobin in the blood and the degree of saturation with oxygen. The analysis of these blood parameters can prevent a number of diseases and the deterioration of human health. What is important, the analysis is carried out without taking blood samples - by remote spectroscopy. This opens the way for new sensors to wearable electronics such as smartphones, fitness bracelets or smartwatches.

The Alps Electric sensor is built into the mouse. The sensor is located under the thumb and constantly monitors the level of hemoglobin and its saturation with oxygen. For this, two LED lasers in the near infrared range are used, but with different wavelengths. One laser determines the level of hemoglobin saturated with oxygen (oxyhemoglobin), and the second one without oxygen (deoxyhemoglobin).

In addition, sensors for temperature and humidity of the environment are built into the mouse (and you also need a meter for the level of carbon dioxide in the air - this is an important parameter that affects human performance). The combination of indications is displayed on the display of a conventional computer and allows you to study the history of changes in the user's state of health. This is easier and more effective than specifically conducting research, which you still need to force yourself to do.

Apple CareKit is one of the possible implementations of monitoring the user's health indicators using a smartphone.

During this year, this development by Alps Electric will be brought to perfection. Starting next spring, the company promises to start sending samples of sensors for hemoglobin analysis to all interested customers. It should be expected that development will appear in commercial products towards the end of 2017 or in 2018.

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