Indicators, detectors. Schemes, articles of the Free Technical Library

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Indicators, sensors, detectors. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Indicators, detectors

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Wind turbines in agriculture

Section Alternative energy sources. Modern wind turbines are quite advanced power plants. With their help, useful energy can be obtained from the fickle wind for the mechanization of various production processes. Modern wind turbines differ favorably from other power plants in that they do not require fuel. This is of exceptional importance for those areas of our country where local fuel reserves are small. Thus, the operation of high-speed wind power stations in the farms of the Main Directorate of the Northern Sea Route has shown that in the conditions of the Far North, wind power stations can successfully provide the production of almost all the necessary energy. Fuel engines were put into operation only during repairs of wind turbines ... >>

Engine sound and car horn simulator

Section Calls and audio simulators. Another version of the electronic imitator - it allows you to simulate the rumble of a running internal combustion engine and a horn tone. Such a universal device will help to revive various toys, models and models of machines and mechanisms, such as cars, motorcycles, tractors, diesel locomotives. The basis of the device is an asymmetric multivibrator assembled on transistors VT1 and VT2 of a phase structure (Fig. 1). It was possible to expand the capabilities of the simulator through the use of two separate frequency-dependent circuits with different time constants, switched by a push-button switch SB1. Turn on the device with the toggle switch SA1, applying battery voltage GB1 ... >>

AC Filament Control in a Power Amplifier

Section Tube power amplifiers. Glow filaments (4 in total, two channels shown) are monitored for breakage. The current transformer TR1 is wound in a B30 cup with a two-section frame. Primary winding - 3 turns of filament wire, secondary - PEV 0.3 before filling in bulk. In this case, an alternating current of 3A creates a constant voltage of 1.5V at the outputs of the detectors. Resistor R1 must be reduced to 20kΩ (suppress RF resonances) ... >>

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Articles on indicators, sensors, detectors

Articles on indicators, sensors, detectors; diagrams of indicators, sensors, detectors; descriptions of indicators, sensors, detectors: 104 articles

See also: Articles on metal detectors

Articles on metal detectors; schemes of metal detectors; descriptions of metal detectors: 124 articles

All articles on consumer electronics

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

Microbial fuel cells 09.12.2012

An unexpected source of new, environmentally friendly energy has been found - a microbial fuel cell plant that can generate electricity from the natural interaction between living plant roots and soil bacteria, that is, extract electricity from the most ordinary swamps. This technique is already being used, but so far on a small scale. And soon it will be used everywhere in large wetlands around the world.

The microbial fuel cell plant draws electricity from the soil while the plants continue to grow. Plants produce organic matter through photosynthesis. The roots release up to 70% of this material into the soil. And all this remains unused and literally disappears into the ground. Bacteria around the roots decompose organic residues, thus forming a new source of electricity. Degradation processes release electrons. Researcher Marjolein Helder and her colleagues placed electrodes among bacteria to absorb these electrons and thereby generate electricity using potential differences.

A microbial fuel cell plant can currently generate 0,4 watts per square meter of swamp turf. This is more than what is created by the fermentation of biomass. In the future, bioelectricity from a plant will be able to produce 3,2 watts per square meter of green mass. This means that a 100 m2 plot, placed on a flat roof, will generate enough electricity to power household appliances in the house at an average consumption of 2800 kWh per year. Various types of plants can be used, including herbs as common as English cordgrass, and in warmer countries, rice.

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