Automatic Command by voice. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Medicine
Comments on the article
The "Voice command" machine gun can be installed at the bed of a seriously ill patient.
The machine responds to a sound of a certain frequency, for example, the sound "0" has a frequency of 150-300 Hz, and the sound "a" has a frequency of 700-1100 Hz. Several automata, tuned to different sound frequencies, can turn on the lights, ring the bell and give other commands. The microphone type MD44 is loaded on the winding of the output transformer (from any radio receiver).
Details. R1= 500 Ohm, R2- 33 kOhm; relay K1 type RP-4 with a tripping current of 1-3 mA; capacitor capacitance C2 \u10d 100 microfarads. The machine is powered by a XNUMX V DC source.
It is adjusted by selecting the capacitance of capacitor C1 to pronounce a certain sound. The secondary winding of the transformer, together with the capacitor C1, forms an oscillatory circuit, the tuning frequency of which determines the frequency of the sound to which the machine reacts.
See other articles Section Medicine.
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 When learning a language, it is better to write by hand
20.07.2021
When learning a new language, scientists have found that writing by hand is better than typing or watching videos.
In the study, volunteers learned the Arabic alphabet from scratch. They were divided into three groups: those who wrote by hand, those who typed text on the keyboard, and those who watched the video. Those who watched the video had to learn a letter and then immediately find that letter on the screen. The typing participants had to find the letter on the keyboard, and the handwritten participants had to write the letter with a pen on paper.
Each group was given six lessons. During this time, each volunteer had to learn the alphabet and make a minimum of mistakes during testing. People who wrote by hand learned it faster than others. Some of them learned the alphabet in just two sessions.
The scientists also tested other indicators of literacy: they wanted to see if the volunteers could "generalize" new knowledge and use letters to write new words and recognize unfamiliar words. Once again, the people who wrote by hand did a better job than anyone else.
Each study participant was an adult, but experts believe the same principles apply to children. The key, they believe, is that writing on paper reinforces what students learn about a letter, such as a sound, beyond their form.
|
Other interesting news:
▪ Mouse left
▪ ASRock iBOX-V2000 Mini PC
▪ Miniature rocket engine powered by water
▪ Automatic submarine record
▪ DRAM production using EUV lithography
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ section of the Electrician website. Article selection
▪ article Golden youth. Popular expression
▪ article Where do they get iron for steel production? Detailed answer
▪ article Bandage on the chest. Health care
▪ article On the marking of ceramic capacitors. Encyclopedia of radio electronics and electrical engineering
▪ article Stroboscopic SDU. 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