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Household electrical appliances. Schemes, articles, descriptions

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Frequency synthesizer for broadcasting FM-FM receiver based on LM7001J + PIC16F84A chips



Section Audio. The device is based on an inexpensive SANYO LM7001J frequency synthesizer, which is often used in foreign household radio equipment. MT-10T7-7T (75 rubles) by MELT was used as an LCD indicator, which has a lot of advantages over the frequently used HT1613: the presence of decimal points, ease of pairing with PIC16F84A in terms of signal levels, a wider viewing angle and most importantly - availability ... >>

Converter from 50 MHz to 24 MHz



Section Radio reception. The converter from the 50 MHz to 24 MHz range, proposed by F6HCC, is assembled on the UL1042 chip. The inductors are wound turn to turn on frames 8 mm in diameter with adjusted cores according to fig. 59. L1 - 3, L2 - 3, L3 - 9, L4 -15, L5 - 3 turns. L3 is wound with a wire with a diameter of 0,5 mm, and the rest - 0,2 ... 0,3 mm ... >>

Electric thermometer, 20-45 degrees



Section Power regulators, thermometers, heat stabilizers. Everyone had to measure their temperature with a mercury thermometer during illness. This procedure usually takes 5-7 minutes. If adults hold the thermometer calmly, then children have to be watched so that they do not accidentally break it. The proposed device allows for 3 seconds to measure the temperature of a body or object (for example microchips) in the range from 20 to 45°C with an accuracy of no worse than 0,1°C. This range, if desired, can be easily expanded or shifted during manufacture. Compared to a mercury thermometer, an electric thermometer is more convenient and safer, especially when you have to take the temperature of small children or animals. ... >>

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Articles on household electrical appliances

Articles on household electrical appliances; descriptions of household electrical appliances: 24 articles

 


 

All articles for an electrician

Regulatory documentation for an electrician

 


 

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

Weeding video camera 06.03.2011

Norwegian engineers have created a "smart" sprayer that, using video cameras equipped with image recognition software, recognizes weeds and sprays herbicide only on them, and not on cultivated plants. Chemicals are saved and environmental pollution is reduced.

Before processing the bullet, photographs of the most common weeds in a given place must be stored in the memory of the device.

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