Touch power controller on the K145AP2 chip. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Clocks, timers, relays, load switches
Comments on the article
The stability and reliability of the "Touch power controller on the K145AP2 chip" ("PX" No. 3/99, p. 35) can be improved by slightly changing and simplifying the circuit. To improve safety, Yuri recommends replacing the R1 resistor (according to the numbering of the original circuit) with 2 connected in series with 3 MΩ each.
The performance does not deteriorate if, in the original circuit, the capacitor C1 and the resistor R3 are short-circuited, and the protective zener diode VD1 is "thrown away" - there is a corresponding built-in protection inside the IC. By transferring the zener diode VD2 to the common point VD3 / C5, it is possible to achieve the correct operation of the rectifier that feeds the IC, and in addition, it becomes possible to use the cheap low-voltage KD209 or KD3 instead of the high-voltage KD521B as VD522.
As a choke Dr.1, Yuri recommends using a standard DM 0,6 at 50 μH, and a triac - TS106-10, paying attention to the fact that the pinout of the latter in the reference sheet of the Radio magazine was indicated incorrectly.
(click to enlarge)
Author: Yury Karanda, Izyum, Kharkiv region; Publication: N. Bolshakov, rf.atnn.ru
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 Smartphone use improves memory
07.09.2022
Scientists from University College London (UK) believe that the use of gadgets allows you to remember even unsaved information on them.
In the past, neuroscientists have expressed concern that excessive use of gadgets could lead to damage to brain function. However, scientists deny this.
British experts conducted a study involving 158 volunteers aged 18 to 71 years. They were shown up to 12 numbered circles on the screen of smartphones: some of them had to be moved to the left, and others to the right. The movement of the circle to one side was estimated at ten times more than to the other.
Participants completed the task 16 times. As it turned out, they used digital devices to store parts of expensive chains. This, according to scientists, improved their memory by 18%. Completing the task with moving low-value circles also improved memory by 27%, even in people who never set any reminders for it. As it turned out, volunteers recalled low-value circles better than expensive ones. They explained this by the fact that they trusted expensive circles to their devices, and then forgot about them.
"We found that when people could use external storage, the device helped them remember the information stored on them. But we also found that the device improves people's memory even for unsaved information," said Sam Gilbert, a researcher at UCL's Institute of Cognitive Neuroscience, who led the study.
This suggests that people rely on their memory when they want to remember important information. But if they could use smartphones, they preferred to save important information and remember less important information.
|
Other interesting news:
▪ Neurolink - mini brain implant
▪ Huawei's fastest smartphone
▪ Apples won't turn brown
▪ ASUS ROG Strix LC II Liquid Cooling Systems
▪ Black holes helped solve the problem of batteries
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ section of the site Interesting facts. Selection of articles
▪ article Weapons of self-defense: classification, application procedure. Basics of safe life
▪ How was the medieval Frankish state formed? Detailed answer
▪ article Upholsterer. Standard instruction on labor protection
▪ article Radiation sensor in the security system. Encyclopedia of radio electronics and electrical engineering
▪ article Repair of network transformers. 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