Thyristor turn signal relay. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Automobile. Electronic devices
Comments on the article
A non-contact signaling relay for turning a car can be designed using silicon controlled diodes - thyristors. A diagram of such a relay is shown in the figure.
The relay is a conventional multivibrator on transistors T1 and T2, the switching frequency of which determines the frequency of flashing of the lamps, since this multivibrator controls the DC switch on thyristors D1 and D4.
Any low-power low-frequency transistors can work in a multivibrator.
When the switch P1 is connected to the signal lamps of the front and rear sidelights, the multivibrator signal opens the thyristor D1 and the battery voltage is applied to the signal lamps. In this case, the right plate of the capacitor C1 is charged positively (relative to the left plate) through the resistor R5. When the trigger pulse of the multivibrator is applied to the thyristor D4, this thyristor opens and the charged capacitor C1 is connected to the thyristor D1 so that it instantly receives a reverse voltage between the anode and cathode. This reverse voltage closes thyristor D1, which interrupts the current in the load.
The next triggering pulse of the multivibrator reopens thyristor D1 and the whole process is repeated. Diodes D223 are used to limit negative current surges and improve the start of thyristors.
Any low-power thyristors with any letter indices can be used in the DC switch. When using KU201A thyristors, the current consumed by signal lamps should not exceed 2 A; for KU202A thyristors, it can reach up to 10 A.
The relay can also operate from the on-board network with a voltage of 6 V.
Author: A. Stakhov, Kazan; Publication: N. Bolshakov, rf.atnn.ru
See other articles Section Automobile. Electronic devices.
Read and write useful comments on this article.
<< Back
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 Physics and Linguistics
04.02.2012
Murray Gell-Mann, an American physicist and winner of the 1969 Nobel Prize in Physics, is known for his work in the field of elementary particles and for predicting the existence of quarks. Unexpectedly, he published an article on linguistics last fall, albeit in collaboration with a professional philologist.
They examined the typical word order in sentences in 2011 languages, including dead ones, and concluded that in short phrases of the first human language (judging by the data of archeology, genetics and linguistics, it arose about 50 years ago), the subject came first, then the object and at the end the predicate. For example: "The man killed the bear." In the future, there was an evolution: "A man killed a bear" and (in the most "advanced" languages) "A man killed a bear." However, this evolution applies only to languages with a fixed word order, such as English.
Curiously, Gell-Mann is not the first prominent physicist to become interested in linguistics. The English scientist Thomas Young (1773-1829), who proved the wave nature of light, contributed to the deciphering of Egyptian hieroglyphs.
|
Other interesting news:
▪ Generic Antibiotic
▪ Organic photovoltaic cells with record performance
▪ Compact tokamak warmed up to a record 100 million kelvins
▪ rose transistor
▪ Toyota Mirai hydrogen car
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ section of the website Experiments in Physics. Selection of articles
▪ article Illusions of movement. Encyclopedia of visual illusions
▪ article Why was the Zhiguli for sale in Europe renamed Lada? Detailed answer
▪ article Wild strawberry. Legends, cultivation, methods of application
▪ article Tunable square-wave generator. Encyclopedia of radio electronics and electrical engineering
▪ article Automation and telemechanics. Automatic regulation of excitation, voltage and reactive power. Encyclopedia of radio electronics and electrical engineering
Leave your comment on this article:
All languages of this page
Home page | Library | Articles | Website map | Site Reviews
www.diagram.com.ua
2000-2024
Arabic
Bengali
Chinese
English
French
German
Hebrew
Hindi
Italian
Japanese
Korean
Malay
Polish
Portuguese
Spanish
Turkish
Ukrainian
Vietnamese