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Microcontrollers. Schemes, articles, descriptions

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Automatic charger

Section Car. Batteries, chargers. It is advisable to supplement the charger for car batteries with an automatic device that turns it on when the battery voltage drops to a minimum and turns it off after charging. This is especially true when using the battery as a backup power or when the battery is stored for a long time without operation - to prevent self-discharge. The proposed scheme turns on the battery for charging when the voltage on it drops to a certain level and turns it off when the maximum is reached. The maximum voltage for acid car batteries is 14,2 ... 14,5 V, and the minimum allowable during discharge is 10,8 V. It is desirable to limit the minimum for greater reliability to 11,5 ... 12 V ... >>

Devices on logical elements

Section Beginner radio amateur. Let's start with a self-oscillating multivibrator. Being a universal device, it can find a variety of applications. Take, for example, a multivibrator with three logic elements. When mounted with a transistor indicator, it becomes a light pulse generator that can be used for a lighthouse model. If the transistor is of medium or high power, for example, KT801A, several miniature incandescent lamps connected in parallel can be included in its collector circuit - they will decorate a small Christmas tree ... >>

Silver plating of conductors and parts

Section Ham Radio Technologies. Consider the case of silvering a copper wire. For work, you will need three faience or glass vessels with a volume of 0,5 liters and running water. Concentrated sulfuric acid with a density of 1,84 g/cm3 is poured into the first vessel to decapitate the wire surface. The second vessel, into which water is constantly poured, is needed to flush the wire before silvering and then after it. The third vessel is filled with a solution for silvering. It consists of silver nitrate - no more than 10 g, medical glucose - 5 g and aqueous ammonia 25% - 20 ml. Silver nitrate is dissolved in 250 ml of distilled water and then aqueous ammonia is poured in. After the brown precipitate of silver oxide formed at the first moment is completely dissolved, glucose dissolved in a separate bowl in 200 ml of water is added to the vessel, stirring the solution. ... >>

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Articles on microcontrollers

Articles on microcontrollers; circuits on microcontrollers; descriptions of microcontrollers: 133 articles



Latest news of science and technology, new electronics:

Sound-absorbing silk 17.05.2024

In a world where noise is becoming increasingly intrusive, the emergence of innovative materials that can reduce its impact is of great interest. MIT researchers have unveiled a new sound-absorbing silk fabric that promises to revolutionize quiet spaces. The Massachusetts Institute of Technology (MIT) has made significant breakthroughs in the field of sound absorption. Researchers have developed a special silk fabric that can effectively absorb sound and create cozy, quiet environments. The fabric, thinner than a human hair, contains a unique vibrating fiber that is activated when voltage is applied to it. This feature allows the fabric to be used to suppress sound waves in two different ways. The first method uses fabric vibrations to generate sound waves that cover and cancel out unwanted noise, similar to noise-canceling headphones. This p ... >>

High Energy Density Capacitor 17.05.2024

Energy plays a key role in many aspects of modern life, and the ever-increasing demand for efficient and fast-charging power sources is driving innovation. Researchers at the McKelvey School of Engineering at Washington University in St. Louis have taken a significant step forward with a high-energy-density capacitor that promises to revolutionize the world of energy. A team of scientists from the McKelvey School of Engineering at Washington University in St. Louis presented the results of their latest research on heterogeneous thin-film structures for capacitors. Researchers, working with ferroelectrics, inadvertently created a capacitor with an amazing energy density that is 19 times higher than that of conventional elements. This breakthrough opens up new prospects for the development of fast-charging batteries, which are so necessary in the modern world. Capacitors play a key role in various devices, providing stable ... >>

Causes of conflicts between brothers and sisters 16.05.2024

Family relationships are often complex and multi-layered, and conflicts between siblings are no exception. Research in this area can help us understand what factors underlie these conflicts and why they occur so frequently. Let's look at some of the findings from psychologists at Arizona State University. American psychologists from Arizona State University conducted a study aimed at identifying the causes of conflicts between brothers and sisters. They found that different forms of violence, whether physical or verbal, did not depend on the gender of the siblings. This means that both girls and boys can exhibit aggressive behavior towards their loved ones. Other studies have shown that conflict between siblings often persists into adulthood, even as contact decreases. This indicates that people often follow established patterns of behavior formed in childhood. It was also found that, despite ... >>

Random news from the Archive

The smallest smartphone 20.11.2017

The Japanese company FutureModel has released the NichePhone-S, which is slightly larger than a credit card.

The NichePhone-S measures just 90 x 50mm and is 6,5mm thick. It weighs just 38 grams and is powered by a MediaTek MT6572A dual-core processor running Android 4.2 Jelly Bean. The display of the smartphone is not touch, but the usual monochrome - with a diagonal of 0,96 inches and a resolution of 128 x 64 pixels.

The battery capacity is 550 mAh. This is enough for 72 hours of standby time or three hours of continuous talk time. The NichePhone-S also boasts Wi-Fi and Bluetooth adapters, a voice recorder, an alarm clock, and a music player that can play music from the cloud. With a tiny smartphone, you can make calls and send text messages.

To control the phone, hardware buttons on the front panel are used, which make the NichePhone-S look like a pocket calculator. Charging uses a Micro-USB port, and the body can be white or black. The smartphone will go on sale in Japan starting today for around $88.

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