Dosimeters. Schemes, articles of the Free Technical Library

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Dosimeters. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Dosimeters

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Heat pumps in public buildings

Section Alternative energy sources. The main task of compressor equipment in public buildings is cooling, which is necessary either due to climatic conditions or to remove heat from internal sources of lighting, equipment, and personnel. A significant cooling load is required by data centers in service buildings. In this case, as a rule, it is not taken into account that the refrigeration unit used is by its nature a heat pump. Despite the fact that the heat removed from the condenser of the refrigeration plant has a relatively low temperature, its beneficial use provides significant energy savings. ... >>

Calculation of the current stabilizer

Section Amateur radio calculations. To obtain a more constant voltage at the load when the consumed current changes, a stabilizer is connected to the rectifier output, which can be made according to the circuit shown in Fig. 1. In such a device, a zener diode V5 and a regulating transistor V6 work. The calculation will allow you to select all the elements of the stabilizer, based on the given output voltage Un and the maximum load current In. However, both of these parameters should not exceed the parameters of the already calculated rectifier. And if this condition is violated, then the stabilizer is first calculated, and then the rectifier and power transformer ... >>

Voltage stabilizer on the comparator, 19-30/5 volts 2 amps

Section Voltage stabilizers. The voltage stabilizer (Fig. 5.12) works as follows. The comparator compares the sawtooth exemplary voltage with part of the output voltage taken from the divider R8, R9. As long as the output voltage is greater than the reference voltage, the key transistor is closed. As soon as the sawtooth voltage exceeds the output, the comparator signal will open this transistor. The lower the voltage at the output of the stabilizer, the longer the transistor will be open. After the sawtooth voltage drops, the transistor closes and the L2 choke circuit - the load closes through the powerful diode VD3 that has opened at that moment. As soon as the key transistor opens, the VD3 diode immediately closes. The input filter weakens the penetration of impulse noise into the mains, the output filter - into the load ... >>

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Articles on dosimeters

Articles on dosimeters; dosimeter schemes; descriptions of dosimeters: 22 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

When the water intoxicates 05.11.2003

Psychologists from the University of Victoria (Wellington, New Zealand) conducted a curious experiment.

148 students were divided into two groups. In a university bar, both groups drank non-alcoholic tonic from identical glasses. But one group was told that they would be treated to a tonic with vodka, and accordingly the same tonic was poured into a glass from a vodka bottle. Those who drank "vodka" experienced a slight intoxication, swayed slightly on the go, their speech became stammering.

Both groups were shown a short film re-enacting the crime and then given a description of the events shown, which deliberately deviated from the plot of the film. "Drunk" more often than sober claimed that the text accurately retells the content of the film, and were absolutely sure that they were not mistaken.

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