Light relays. Scheme, description

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Light relays. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Clocks, timers, relays, load switches

Comments on the article

The presented photorelay circuits are intended for indication purposes.

(click to enlarge)

The circuit shown on the left is active during the day (the relay should work), in the circuit shown on the right, the relay works at night, i.e. the circuit is active at night. The sensitivity is regulated by the resistance R2.

Publication: cxem.net

See other articles Section Clocks, timers, relays, load switches.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Diet can change the taste of sugar 18.04.2020

Researchers at the University of Sydney found that the perception of sweet taste changes in response to different diets. This is why low-calorie sweeteners can be harmful.

Although it has long been known that different people perceive the taste of food differently, depending on their habitual diet, scientists still did not understand the molecular pathways that control this effect. Professor Greg Neely with Professor Qiaoping Wang of the Charles Perkins Center at the University of Sydney proved that sweet taste is very subjective. They learned four important things:

- the foods we eat can change how we perceive food in the future;
- it uses the mechanism that the brain uses for learning;
- diets that increase life expectancy improve taste perception;
Lifespan, learning and sensory perception are linked.

Professor Wang, leader of the study, said: "We were surprised to find that a protein-restricted diet, which allows you to live much longer, also increases the intensity of sucrose intake."

Scientists have found that eating large amounts of sugar suppresses the perception of sweet taste, causing sugar to appear less sweet. This is why artificial sweeteners help increase food intake, especially when combined with a low-carb diet.

Central to these connections is the neurotransmitter dopamine, which is responsible for "reward." “It came as a complete surprise to us that the same chemical pathways that are used to control learning and memory are at work in this case. They also enhance taste sensations. This proves that learning is a whole-body phenomenon,” says Professor Neely.

Other interesting news:

▪ Salt heating

▪ A new way to measure ocean water temperature

▪ Light switch without wires

▪ Yeast medicines

▪ Electronic map of pastures of Kyrgyzstan

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Electrical safety, fire safety. Article selection

▪ article Courage! Let's give each other hands and boldly move forward. Popular expression

▪ article In which country do cities differ in the predominant colors of buildings and houses? Detailed answer

▪ article Managing the internal motivation of employees to comply with labor protection requirements

▪ article Energy of the Sun. Encyclopedia of radio electronics and electrical engineering

▪ article The appearance of a rose from a scarf. Focus Secret

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews