Electrician's tool. Schemes, articles of the Free Technical Library

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Articles on the tool for the electrician. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Electrician Tool Articles

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Transformerless power supply on KRENK, 220/12-22 volts

Section Power supplies. When it is necessary to power some home device with a low current consumption (up to 150 mA) from the mains, which works autonomously (clock, night light, electronic thermometer, etc.) and has a plastic case (the risk of electric shock is excluded), it is advisable to use transformerless power supplies. In the proposed source, the KR142EN8 microcircuit is used as a stabilizer. The source provides an output voltage of 12 V, which depends on the type of integrated regulator used. With a load current of up to 150 mA, the DA1 chip has a small voltage drop, i.e. the difference between the input and output voltage DA1 is no more than 2,5 V ... >>

GKCH - 0,15 - 230MHz

Section Measuring technology. The swept frequency generator is designed to measure the frequency response of high-frequency paths in the range from 150 kHz to 230 MHz. From the jack vyh.vch. a high-frequency signal (voltage 0-0,25V) is fed to the input of the device under study. The variable resistor adjusts the desired RF output level. From the output of the device, the signal is fed to the detector head Detection head, from the output of which the detected signal is fed to the Y input of the oscilloscope. The center frequency is often set with a variable resistor, and the deviation with the resistor is the sweep bandwidth (up to 20 MHz). At the entrance i.o.h. negative pulses are applied at the moment of the reverse beam ... >>

CRT filament protection device

Section Television. Analyzing the development of the circuitry of the filament protection devices of the cathode-heating unit (CPU) of cathode ray tubes (CRT), mainly television kinescopes, one cannot help but pay attention to the lack of new technical solutions over the past few years. The main problem remains the satisfaction of the entire set of requirements for the protection device, since the improvement of some indicators is associated with the deterioration of others. This allows us to draw the following conclusion: the possibilities of circuitry based on the use of traditional element base for this type of device are practically exhausted. ... >>

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Electrician Tool Articles

Articles on tools for an electrician; electrician tool descriptions: 30 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. ... >>

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The clock controls the TV 09.12.2000

The Japanese company Casio has released an electronic watch with a built-in TV and VCR remote control.

Since the electronics of different models are subject to different signals, the wrist control panel is able to self-learn from the "native" remote controls that are attached to TVs and VCRs.

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