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Regulators of current, voltage, power. Schemes, articles, descriptions

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Regulators of current, voltage, power

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Seven Band Antenna

HF Antenna Section. We offer a two-tier antenna operating on 10, 12, 15, 17, 20, 40-80 meters of the HF band. The upper tier (B) works on 10, 15, 20, 40, 80 meters, the lower tier (H) - on 12 and 17 meters (Fig. 1). The input impedance (V) is 180 220 ohms, (H) 45 50 ohms. The antenna is powered by two coaxial cables, separately for each tier (Fig. 2). The transformer Tr1 with a ratio of 1: 4 is wound on a ferrite ring with a diameter of 60 mm and a height of 10 mm, the permeability is 400 600. It is wound simultaneously with two wires with a diameter of 1,5 mm or a line with a wave resistance of 100 Ohm - evenly along the ring, 10 turns. You can use transformers from the RV-12 antenna ... >>

Protection of input circuits of radio receivers

Section Radio reception. When a transistor radio operates at frequencies near which powerful radio stations operate, there is a danger of failure of the first transistor due to high voltages induced in the antenna. When using a common method of protection with two diodes connected in anti-parallel, with a large signal exceeding the level of 0.7 V, combinational noise appears. This can be avoided. if you use the diagram shown in the figure ... >>

Equipment options for objects for video surveillance

Electrical section. A large number of premises and territories existing at the facility do not always allow giving unambiguous recommendations on the placement of cameras (TC). This section discusses the standard premises (room, corridor, stairs) and areas (perimeter, car parking) that can be found at most facilities, and gives recommendations for placing the TC in these premises (territories). In any case, options for equipping facilities should be selected individually for each facility at the stage of its study and agreed with the customer. ... >>

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Articles on current, voltage, power regulators

Articles on regulators of current, voltage, power; circuits of current, voltage, power regulators; descriptions of current, voltage, power regulators: 93 articles



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Latest news of science and technology, new electronics:

Sound-absorbing silk 17.05.2024

In a world where noise is becoming increasingly intrusive, the emergence of innovative materials that can reduce its impact is of great interest. MIT researchers have unveiled a new sound-absorbing silk fabric that promises to revolutionize quiet spaces. The Massachusetts Institute of Technology (MIT) has made significant breakthroughs in the field of sound absorption. Researchers have developed a special silk fabric that can effectively absorb sound and create cozy, quiet environments. The fabric, thinner than a human hair, contains a unique vibrating fiber that is activated when voltage is applied to it. This feature allows the fabric to be used to suppress sound waves in two different ways. The first method uses fabric vibrations to generate sound waves that cover and cancel out unwanted noise, similar to noise-canceling headphones. This p ... >>

High Energy Density Capacitor 17.05.2024

Energy plays a key role in many aspects of modern life, and the ever-increasing demand for efficient and fast-charging power sources is driving innovation. Researchers at the McKelvey School of Engineering at Washington University in St. Louis have taken a significant step forward with a high-energy-density capacitor that promises to revolutionize the world of energy. A team of scientists from the McKelvey School of Engineering at Washington University in St. Louis presented the results of their latest research on heterogeneous thin-film structures for capacitors. Researchers, working with ferroelectrics, inadvertently created a capacitor with an amazing energy density that is 19 times higher than that of conventional elements. This breakthrough opens up new prospects for the development of fast-charging batteries, which are so necessary in the modern world. Capacitors play a key role in various devices, providing stable ... >>

Causes of conflicts between brothers and sisters 16.05.2024

Family relationships are often complex and multi-layered, and conflicts between siblings are no exception. Research in this area can help us understand what factors underlie these conflicts and why they occur so frequently. Let's look at some of the findings from psychologists at Arizona State University. American psychologists from Arizona State University conducted a study aimed at identifying the causes of conflicts between brothers and sisters. They found that different forms of violence, whether physical or verbal, did not depend on the gender of the siblings. This means that both girls and boys can exhibit aggressive behavior towards their loved ones. Other studies have shown that conflict between siblings often persists into adulthood, even as contact decreases. This indicates that people often follow established patterns of behavior formed in childhood. It was also found that, despite ... >>

Random news from the Archive

MSI QD-OLED Gaming Monitors 03.11.2023

MSI has announced a new line of gaming monitors with QD-OLED technology, including models with curved and flat screens.

The flagships of this line will be two curved models. The first, MAG 341CQP QD-OLED, features a 34-inch UWQHD QD-OLED 1800R panel, delivering a GTG response time of 0,03ms and a 175Hz refresh rate. The second, MPG 491CQP QD-OLED, offers a 49-inch DQHD 1800R panel with a 32:9 aspect ratio. This monitor has a 144Hz refresh rate and a GTG response time of 0,03ms. Both models are certified to VESA ClearMR 9000 and DisplayHDR True Black 400 standards.

These new QD-OLED monitors feature HDMI 2.1 connectors with full 48Gbps bandwidth, 120Hz support, VRR and ALLM. MSI Console mode supports CEC (Consumer Electronics Control) function, allowing users to control their devices with a single controller. A Type-C connector is also available for interaction with mobile devices.

In addition, MSI produces several flat-panel gaming monitors. 27-inch models such as the MPG 271QRX QD-OLED and MAG 271QPX QD-OLED feature WQHD 2K resolution, a 360Hz refresh rate, and a 0,03ms GTG response time. Also featured is a 32-inch monitor with 4K resolution and a 240Hz refresh rate.

All of these monitors also feature Type-C interfaces supporting up to 90W of power and support MSI console mode.

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