Blinking LED. Encyclopedia of radio electronics and electrical engineering

Encyclopedia of radio electronics and electrical engineering / Color and music settings

 Comments on the article

A simple, but funny scheme. It makes sense to assemble if you have an unnecessary bright LED (5-7 cd) lying around.

You can screw it into the car or hang it on the stairwell, when, once again, a light bulb was stolen from there - there will be very non-trivial lighting.

The flash frequency is determined by the value of the resistors R1 and R2 and the capacitor C1. And so that you don’t worry too much, at the end there is a table with examples of the relationship between the denominations of parts and the frequency of flashes.

If the circuit refuses to work with any ratings, pay attention first of all to R1 - it may be too small and R2 - it may be too large.

Generally speaking, resistors R1 and R2 affect the process differently. The duration of the pause between pulses depends on R1 to a greater extent, and the duration of the pulse depends on R2.

This scheme is quite universal from the point of view. loads. It will quite pull a light bulb and even a 4-ohm speaker. Of course, for this it is necessary to select VT2 for the required power. In this case, the load will no longer be included in the emitter circuit VT2 (as the LED is turned on), but in the collector, instead of R3. We put a jumper in place of the LED.

If a speaker is used as a load, then we probably want to get sound from it? To transfer the generator to the audio range, it is enough to recalculate the capacitance of the capacitor in proportion to the desired frequency. For example, take the 2nd row of the table. The frequency is 60 per minute, that is, 1 per second, that is, 1 Hz. And we, say, need 1000 Hz. This means: we reduce the capacitance C1 by 1000 times - 0,001 uF = 1nF. We put, turn on - enjoy :) In addition, you can try to reduce the resistance of the resistors. But don't get too carried away, especially R1 - you can burn the tranzyk :(

Publication: radiokot.ru, cxem.net

See other articles Section Color and music settings.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

New method for creating powerful batteries 08.05.2024

With the development of technology and the expanding use of electronics, the issue of creating efficient and safe energy sources is becoming increasingly urgent. Researchers at the University of Queensland have unveiled a new approach to creating high-power zinc-based batteries that could change the landscape of the energy industry. One of the main problems with traditional water-based rechargeable batteries was their low voltage, which limited their use in modern devices. But thanks to a new method developed by scientists, this drawback has been successfully overcome. As part of their research, scientists turned to a special organic compound - catechol. It turned out to be an important component that can improve battery stability and increase its efficiency. This approach has led to a significant increase in the voltage of zinc-ion batteries, making them more competitive. According to scientists, such batteries have several advantages. They have b ... >>

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Random news from the Archive Smart watch with a living organism inside 25.12.2022 Scientists at the University of Chicago have come up with an unusual solution to the problem of changing gadgets too often and creating electronic garbage profusely - they have created a smart watch, which is provided by mucous - the easiest organism to feed and care for, almost like a Tamagotchi. The solution even allows you to establish an emotional connection with the smart watch. The use of a conductive protozoan organism - the plasmoid slime Physarum polycephalum - made it possible to create a smart watch that works only if the body in the body is healthy and supplied with food. In fact, the watch is a kind of simple cyborg with interconnected living and inanimate parts. It is expected that the presence of a living organism in electronics will prevent people from mindlessly changing gadgets at will. Irresponsible consumption leads to an increase in the volume of electronic waste on the planet - 40 million tons are added annually. The study of how a living device affects people's behavior showed that this changed the attitude of users to the technologies used - in fact, we are talking about a two-way mutually beneficial cooperation between the watch and its owner. Surveys showed that when using worn gadgets, it was purely consumer one-way use, while the interaction with the experimental model resembled two-way communication, since it was a living organism - many could not just throw away the watch or just put it in the closet indefinitely. The prototype "live" clock is able to show the time and is equipped with a heart rate sensor. The organism is housed in a special recess in the watch case, and the user must regularly feed it a mixture of water and oatmeal to encourage growth. When the body reaches the other side of the notch, a conductive circuit is activated, allowing the heart rate sensor to work. Also, the body goes into sleep mode if it is not fed - it can be brought back to life after days, months or even years. The organization of human-computer interaction is mainly focused on improving productivity, but here it was said about the emphasis on daily care and nutrition, so the result of the study is partly a work of art. Scientists conducted experiments with five participants, during which the latter wore hours for two weeks. The emotional connection turned out to be more significant than when using toys like Tamagotchi - in such cases, after death, it is easy to reboot. Moreover, the participants in the experiment experienced quite a lot of stress when they were ordered to stop feeding the creature in the watch case, experiencing guilt or even grief.

Other interesting news:

▪ A new method for determining the age of complex deposits

▪ The laser cools the molecules

▪ Cigarette with built-in fire extinguisher

▪ Electric snowboard Cyrusher

▪ Scientists Prove Nietzsche Right

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the Electrician website. Article selection

▪ Article Financial law. Crib

▪ Article What contributes to immoderate performance? Detailed answer

▪ Volga Delta article. Nature miracle

▪ article Running lights on a four-phase multivibrator. Encyclopedia of radio electronics and electrical engineering

▪ article Selection of conductors for heating, economic current density and corona conditions. Permissible continuous currents for cables with impregnated paper insulation. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages ​​of this page

Arabic	Hebrew	Polish
Bengali	Hindi	Portuguese
Chinese	Italian	Spanish
English	Japanese	Turkish
French	Korean	Ukrainian
German	Malay	Vietnamese

Home page | Library | Articles | Website map | Site Reviews

www.diagram.com.ua
2000-2024