miniature generator. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Measuring technology
Comments on the article
This generator allows you to get a logic signal with a discretely changing frequency from 0,5 Hz to 300 kHz and with an amplitude of 5 V.
The circuit diagram of the generator is very simple, it uses a minimum of passive elements and only two integrated circuits. The 9 V supply voltage is supplied from the DA1 integrated regulator connected to a 9 V miniature battery.
The heart of the generator is the Schmitt trigger DD1.1, which, together with R1 and C1, forms a multivibrator built according to the classical scheme. The difference in frequencies produced by the multivibrator is determined by the corresponding number of capacitors, resistors and switches connected to it. The signals at points V1 - V5 can be changed using a different combination of breaks or connections in the circuit circuits using switches SA1 - SA5. The tables clearly show the dependence of the frequency at the output of the device on the position of these switches.
Fo=100HZ
0,5Hz
The generator practically does not require adjustment. It is only necessary to carefully select the capacitors C2, C3, C5. It is better if tantalum capacitors are installed in their place.
The DA1 78L050 chip can be replaced with a voltage regulator KR142EN5A or KR142EN5V. The K555TL2 microcircuit is applicable as a set of inverting logic elements with a Schmitt threshold.
See other articles Section Measuring technology.
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 Area Ragno GRABBER 2 video capture card
06.07.2016
Video capture cards are not the kind of devices that can be found in every PC, especially since analog video standards are practically not used in our time. However, these cards are often used by web browsers and gamers who want to stream the video of a game session to the Web, but do not take up the resources of the main PC. Area has announced a new version of the popular video capture board - Ragno GRABBER 2. The basis of the novelty is the Microsemi IGLOO2 FPGA.
The Ragno GRABBER 2 is a compact half-height (115mm x 55mm) PCI Express x1 card with two HDMI ports (in and out, pass-through supported). The most interesting thing about it is the hardware codec that compresses the video stream on the fly into H.264 format, while the old version of the board made do with the outdated MPEG-2 standard, albeit also in hardware implementation. There has not yet been a revolution in broadcasting, the resolution of 1920 remains the standard? 1080 (Full HD), this resolution is also supported by Ragno GRABBER 2. The first 50 batches of new boards will be delivered with cooling radiators installed on the main chip.
Lower resolutions are also supported, up to 480 x 360, as well as an AVI container with a low level of compression. You can adjust the degree of video stream compression within 1?24 Mbit/s. The manufacturer's website claims support for modes with 24, 25, 30, 50 and 60 frames per second. Apparently, in Full HD resolution, recording is carried out at a maximum of 30 frames per second, although the input supports Full HD @ 60 FPS.
All modern game consoles are supported, from Wii U to Xbox One and PS4. The package includes the necessary recording software that runs on Microsoft Windows 7, 8.1 and 10 operating systems.
|
Other interesting news:
▪ Corks need to be fried
▪ Rings of stable plasma in open air conditions
▪ Processor based on superconductors
▪ Alcatel OneTouch POP7 and POP8 tablets
▪ Dell Inspiron Zino HD
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ site section Electrical work. Article selection
▪ article by George Eliot (Mary Ann Evans). Famous aphorisms
▪ article Who discovered Greenland? Detailed answer
▪ article Engineer of the technical department (editing, viewing studios, etc.). Job description
▪ article Signaling device on the K157XA2 chip. Encyclopedia of radio electronics and electrical engineering
▪ article Once again about the power supply of the digital multimeter from the network. 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