Hourglass simulator with LEDs. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Clocks, timers, relays, load switches
Comments on the article
With a simple op-amp and two LED circuits, an hourglass can be built to act as a three-minute timer.
The circuit contains two Panasonic triangular LEDs, two op-amps, and several add-ons. Switch S1 is opened to start the timer. As a result, the LED D2 starts to glow brighter and D1 dims; this process continues until D2 is fully opened and D1 is locked, marking the expiration of the time interval. This switches the logic output from a low state to a high state.
In addition to the clock, this device can be used to display other analog values such as voltage or frequency offset.
Author: Dan Baker; 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 eGPU Breakaway Puck Radeon RX 5500 XT and eGPU Breakaway Puck Radeon RX 5700 Docks
03.01.2021
Sonnet Technologies has launched the Breakaway Puck Radeon RX 5500 XT eGPU and Breakaway Puck Radeon RX 5700 eGPU docking stations, which use AMD Radeon RX 5500 XT and AMD Radeon RX 5700 graphics cards, respectively. Thunderbolt 3 is used to connect to a computer.
Replacing the discontinued eGFX Breakaway Puck Radeon RX 560 and Radeon RX 570 eGPUs, the new models retain their portable form factor but provide over four times the performance in many cases. In addition, the new models received two USB 3.2 Type-A ports for connecting peripherals and a second Thunderbolt port with support for Thunderbolt / USB-C monitors, including Apple Pro Display XDR 6K resolution.
The Breakaway Puck Radeon RX 5500 XT and Radeon RX 5700 eGPU docking stations are designed for professionals who need to run graphics-intensive applications on an Intel-based MacBook Air, MacBook Pro, Mac mini, or iMac with Thunderbolt 3 ports.
Both models support the simultaneous connection of up to three 4K@60Hz displays (four with an adapter sold separately) or one 6K display and two 4K displays. Supporting USB Power Delivery technology, they can provide up to 60 watts of power to the load. The dimensions of the docks are approximately 152 x 130 x 52 mm.
The Breakaway Puck Radeon RX 5500 XT eGPU is $600 and the Breakaway Puck Radeon RX 5700 eGPU is $900.
|
Other interesting news:
▪ Robots learn by watching people
▪ New Toshiba Projection TVs
▪ stone age dentists
▪ Abnormally high temperature recorded at the North Pole
▪ Women are more sensitive to stress than men
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ section of the site Big encyclopedia for children and adults. Selection of articles
▪ article Urban wastewater. Basics of safe life
▪ Article Where Did Dogs Come From? Detailed answer
▪ article Coriander seed. Legends, cultivation, methods of application
▪ article Computer power supply for round-the-clock work. Encyclopedia of radio electronics and electrical engineering
▪ article Riddles with weighings and transfusions
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