Measuring technology. Schemes, articles of the Free Technical Library

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Free library / Schemes of radio-electronic and electrical devices

Measuring technology. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Measuring technology

We recommend reading in our Free Technical Library:

DIY windmill for $150

Section Alternative energy sources. Recently, I had the idea to generate my own electricity for the house. It was not a great need, but my interest in this topic increased when I read an article about assembling a windmill with a motor from a treadmill and PVC pipes. Having previously estimated the costs, it turned out to be about $ 150-200 for a windmill that could generate approximately 50-250 watts of electricity (this comes out much cheaper than using solar panels for the same output power). And in this article I will share with you my experience of making a windmill with my own hands. ... >>

How to improve reception quality

Section Radio reception. The VHF radio receiver with a PLL proposed at one time by A. Zakharov is still repeated by many radio amateurs. And this is not surprising if we take into account such advantages as simplicity, absence of noise, and slight distortion of the low-frequency signal. However, experience with this receiver revealed a significant dependence of the stability and quality of its reception on the length and position of the antenna and an insufficient synchronization bandwidth. You can reduce the influence of the antenna by introducing a radio frequency amplifier (URCH) into the receiver. It is connected to the receiver as shown in the figure. ... >>

Switching regulator circuit

Section Voltage stabilizers. The switching regulator circuit is not much more complicated than the usual one (Fig. 1.9), but it is more complicated to set up. Therefore, insufficiently experienced radio amateurs who do not know the rules for working with high voltage (in particular, never work alone and never tune the device with two hands - only one!), I do not recommend repeating this scheme. On fig. 1.9 shows the electrical circuit of a switching voltage regulator for charging cell phones ... >>

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Articles on measuring technology

Articles on measuring technique; schemes of measuring equipment; descriptions of measuring equipment: 478 articles

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

Eco-friendly plastic from fish waste 10.04.2021

Bioplastics could be used for almost the same purposes as conventional polyurethane, says team leader Francesca Kerton of Memorial University of Newfoundland (MUN).

Plastic based on fish waste is environmentally friendly. In addition, the invention solves the problem of recycling these food waste. After all, fish heads, bones, skin and intestines, usually sent to landfill, can be turned into a harmless, biodegradable material.

The novelty will replace polyurethane, which today can be found everywhere: in shoes, clothes, refrigerators, building materials, etc. At the same time, polyurethane is obtained from crude oil and phosgene, it has a large carbon footprint and slowly decays.

To produce the new material, the researchers used fat extracted from pieces of salmon left over from industrial processing.

Chemists have developed a method for converting fish oil into a polyurethane-like polymer. First, they added oxygen to the fat to form epoxides. The epoxides were then combined with carbon dioxide. And the resulting molecules were combined with amines containing nitrogen, resulting in a new material.

The new plastic has no fish smell.

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