Handbook of an electrician. Schemes, articles of the Free Technical Library

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Electrician's Handbook. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Electrician's Handbook

We recommend reading in our Free Technical Library:

Motorcycle Stabilizer Rectifier YAMAHA XV 400

Section Car. Batteries, chargers. In the YAMAHA XV 400 motorcycle, the rectifier-stabilizer of the on-board voltage failed. Since the block with the rectifier and control device, installed on the heat sink, is filled with compound, its repair turned out to be impossible. It was not possible to purchase a new block or similar. The car's on-board voltage regulator is not suitable. Therefore, it was decided to develop and manufacture a home-made rectifier-stabilizer. It must ensure the conversion (rectification) of the three-phase alternating voltage of the generator into the direct voltage of the on-board network and maintaining it within 13,8 ... 14,2 V at a current consumption of up to 15 A. It was supposed to use the parts available or available for purchase in the unit ... >>

Light photo switch

Section Lighting. The scheme is designed to automatically turn on street lighting at nightfall and automatically turn it off at dawn. The circuit diagram is shown in the figure. Light level sensor - photoresistor R2 type FSK-1. It is connected between the base and the collector of the transistor VT1, so during the day, when the resistance R2 is low, this transistor opens, as the voltage at its base increases. As a result, the voltage on its collector drops and the transistor VT2 closes. The voltage on its collector increases, respectively, and the voltage between the control electrode of the triac VS1 and the power plus decreases, therefore, it closes and no voltage is supplied to the lamp H1 of the lamp ... >>

Christmas garlands

Section Color and Music Settings. One of the most wonderful holidays is approaching - the New Year. And, of course, in many homes a green beauty will take its rightful place, on the branches of which light bulbs of multi-colored garlands will be placed. And in order for the garlands to shimmer with all the colors of the rainbow, they must not only be painted, but also connected to an automatic switch. Some variants of such a machine are described in the proposed selection. ... >>

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Articles with reference materials for an electrician

Articles with reference materials for an electrician; descriptions with reference materials for an electrician: 76 articles

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Regulatory documentation for an electrician

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Dangerous fungal clouds 29.01.2020

Scientists at the University of California at Irvine (USA) have found that a large number of nanoparticles contained in the atmospheric air, involved in the formation of clouds and causing potentially dangerous asthma in humans, are actually fungal spores.

In 2016, researchers took samples for a month in Oklahoma using a device that captures particles 20-60 nanometers in diameter and then places them on a thin platinum filament. After the molecules evaporated, a high-resolution mass spectrometer analyzed the resulting gases, establishing their chemical composition.

Airborne spores absorb water, swell and rupture into fragments 30 nanometers in diameter, which are much smaller than cells that are thousands of nanometers in diameter, the scientists say. These particles are able to penetrate much deeper into the lungs. The possible allergenicity of spore fragments explains why some people have asthma attacks during rainy seasons.

Nanoparticles can play the role of nuclei to which water molecules are attached. This creates ice crystals, which in turn form clouds.

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