Voltage converters, rectifiers, inverters. Schemes, articles of the Free Technical Library

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Voltage converters, rectifiers, inverters. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Voltage converters, rectifiers, inverters

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Types of wind turbines

Section Alternative energy sources. There are many different wind turbines (WPPs), but all of them can be divided into two types: with a horizontal and vertical axis of rotation. The former have a complex structure, but they have a higher utilization rate of wind energy, so they are more often used in industry. The second ones are simpler in design, but less productive. They are rare on the market and are usually used in private homes. ... >>

Preamplifier on the KM551UD2 chip

Section Preamplifiers. The rated input and output voltages of the amplifier are 0,25 and 1 V, respectively, the harmonic coefficient in the frequency range of 20 ... 20000 Hz is not more than 0,02%, the signal-to-noise ratio (unweighted) is 90dB. The range of volume and tone control (at frequencies of 60 and 16000 Hz) is 60 and ±10 dB, respectively, the crosstalk between channels in the frequency range of 100...10000 Hz is at least 50 dB. The input and output impedances of the amplifier are 220 and 3 kΩ, respectively. The circuit is assembled on a KM551UD2 chip. This IC is a dual op-amp with a supply voltage of ±5 to ±16,5 V. An IC with index A differs from a device with index B by half (4V) input common-mode voltage and a normalized noise voltage reduced to the input (no more than 1 μV at signal source resistance of 600 ohms, for KM551UD2B it is not standardized) ... >>

Elimination of spontaneous switching in MVP-4-5

Section Television. During the operation of the Vesna-276 TV, a malfunction occurred in the SVP-4-5 program selection device - after a while, the TV began to spontaneously switch to other channels. Switching, the TV after an arbitrary period of time again switched to any other channel. Pressing the sensors for selecting programs SB1 ... SB6 (the designations are given according to the schematic diagram [1]) in most cases did not give the desired result. Measuring the voltages in the power circuits, at the pins of the D2 (K155IE9) and D4 (K155ID1) microcircuits, as well as at the pins of all transistors, showed that they are within the passport values. When checking by soldering and continuity of transistors VT12, VT11, VT6, VT3, VT4, VT5, it turned out that they are working ... >>

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Articles on voltage converters, rectifiers, inverters

Articles on voltage converters, rectifiers, inverters; circuits of voltage converters, rectifiers, inverters; descriptions of voltage converters, rectifiers, inverters: 194 articles

All articles on power supply

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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