Yearly Archives: 2025

　　In the fast-paced world of automotive technology, flexible multilayer PCBs are becoming a cornerstone for innovation and efficiency. As a leading manufacturer, Hongmy specializes in producing flexible multilayer PCBs that cater to the unique demands of modern vehicles. Here’s how these cutting-edge components are revolutionizing the automotive industry.For the immediate pressure, aluminum base pcb With its own coping style, it can break the predicament and usher in a new life through the quality of the product itself. https://www.hongmycircuits.com/

　　1. Lightweight and Compact Designs

　　With the growing demand for electric vehicles (EVs) and smart cars, space and weight have become critical factors in automotive design. Flexible multilayer PCBs are inherently lightweight and adaptable, allowing manufacturers to fit complex circuitry into smaller spaces without compromising performance. This innovation reduces overall vehicle weight, which directly improves fuel efficiency and battery life.

　　2. Enhanced Reliability in Harsh Environments

　　Automobiles are exposed to extreme conditions, including temperature fluctuations, vibrations, and moisture. Flexible multilayer PCBs are designed to endure these harsh environments. Their robust construction ensures long-term reliability, reducing the risk of failure in critical systems such as engine management, braking, and safety controls.

　　Multi-Layer PCB Manufacturer in China | HDI Board Supplier

　　3. Supporting Advanced Driver-Assistance Systems (ADAS)

　　The integration of ADAS features, like collision detection, lane assistance, and autonomous driving, requires high-performance PCBs with complex designs. Flexible multilayer PCBs offer the connectivity and signal integrity needed to support these advanced systems, ensuring seamless communication between sensors, processors, and actuators.

　　4. Powering Electric Vehicles

　　The rise of EVs has created a demand for more efficient energy management solutions. Flexible multilayer PCBs are pivotal in battery management systems (BMS) and charging systems, providing precise control and monitoring to maximize energy efficiency and safety.

　　5. Cost-Effective and Scalable Solutions

　　Automotive manufacturers require scalable solutions to meet diverse production needs. Flexible multilayer PCBs are not only cost-effective but also versatile, accommodating both low-volume prototypes and high-volume production. This scalability ensures manufacturers can innovate quickly without incurring prohibitive costs.

　　6. Applications in Infotainment Systems

　　Modern vehicles are equipped with advanced infotainment systems that demand high-speed data transmission and compact designs. Flexible multilayer PCBs support high-frequency signals and fit seamlessly into the limited spaces of dashboards, enabling superior audio, video, and navigation capabilities.

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According to a report by the Russian News Agency on July 15, Vladimir Talabrin, Russia’s Permanent Representative to the Organization for the Prohibition of Chemical Weapons and Russian Ambassador to the Netherlands, told reporters on the 15th that Western countries intend to accuse Moscow of using chemical weapons.

Talabrin reportedly said: Yes, they are working hard to do the work of the Technical Secretariat of the Organization for the Prohibition of Chemical Weapons to force it to take some steps intended to accuse Russia of using chemical weapons.

He said that Russia is fighting back against this in every possible way, trying to prove with concrete facts that all these efforts are futile.

Talabrin said that Russia does not and cannot pose a chemical weapons threat to Ukraine. He pointed out that Moscow does not rule out inviting experts from the Organization for the Prohibition of Chemical Weapons to study evidence of Kiev’s use of such weapons.

The 106th session of the Executive Council of the Organization for the Prohibition of Chemical Weapons was held in The Hague from July 9 to 12. Talabrin said after the meeting that Ukraine blatantly violated the convention and used military poisons against Russian troops, a point that many foreign experts and agencies have talked about. They noted that Ukraine’s armed forces were actively using drones to transport toxic chemicals. In addition, the United States, which supplied these substances to Kiev, is also violating the convention.

Lieutenant General Igor Kirilov, commander of the Radiation, Chemical and Biological Protection Forces of the Russian Armed Forces, said at a press conference that Kiev frequently violated the Chemical Weapons Convention. At the same time, the Organization for the Prohibition of Chemical Weapons, which was supposed to oversee the implementation of the convention, is now completely controlled by the West, which uses the organization to settle political scores with Russia. (Compiled by Wei Lianglei)

　　After more than a year of repeated tests and cooperation with seven other collaborators, the high-performance steel team of Shanghai University School of Materials successfully developed the world’s first 19.8-grade ultra-high-strength bolt known as the world’s strongest fastener.in fact Forged nut Our related products were once praised by users, which is the best self-affirmation of the products. https://www.chinatianlong.com/

　　Through the optimization of materials and heat treatment process, the tensile strength of 16.8 and 19.8 grade bolts at room temperature meets 1600~1770MPa and 1900~2070MPa respectively.

　　The results of shear test (according to GJB 3376-1998) show that the shear force of grade 16.8 and grade 19.8 bolts reaches 97KN and 115KN respectively.

　　The tensile fatigue strength test at room temperature (according to GJB 3376-1998 and GJB715.30A-2002, the load ratio =0.1) shows that the developed fastener meets the fatigue life requirements (the average fatigue life is not less than 65,000 times, and the single fatigue life is not less than 45,000 times).

　　The results of delayed fracture resistance test (according to GJB 715.12-1990, the constant tensile stress was kept for 96 hours in atmospheric environment) showed that the bolt did not break during the test time, and no cracks were found on the bolt surface and thread after unloading. The comprehensive performance of the newly developed ultra-high strength bolt meets the service requirements.

　　Class 16.8 and 19.8 fasteners in kind (specifications are MJ8〜1〜50)

　　Under the same clamping force, the ultra-high strength fastener can reduce its weight and increase the installation space by reducing its own size, so it can optimize the function and volume of the connected parts, so as to achieve the goal of overall weight reduction and performance optimization of the equipment.

　　So what is a high strength bolt? What is the strength of high-strength bolts? Sister Jin brought you here today to find out.

　　one

　　What is a high strength bolt?

　　High-Strength Friction Grip Bolt, literally translated as: high-strength friction preload bolt, abbreviated as HSFG. It can be seen that the high-strength bolt mentioned in Chinese construction is the abbreviation of high-strength friction pre-tightening bolt. In daily communication, only the words “Friction” and “Grip” are briefly mentioned, but it has caused many engineers and technicians to understand the basic definition of high-strength bolts, resulting in misunderstandings.

　　Myth 1:

　　Bolts with material grade over 8.8 are “high strength bolts”?

　　The core difference between high-strength bolts and ordinary bolts is not the strength of the materials used, but the form of stress. The essence is whether to apply pre-tightening force and use static friction to resist shear.

　　In fact, there are only two kinds of high-strength bolts (HSFG BOLT) mentioned in British Standard Specification and American Standard Specification (BS EN 14399/ASTM-A325&ASTM-490), while ordinary bolts include 4.6, 5.6, 8.8, 10.9, 12.9, etc. (BS 3692 11, Table 2) It can be seen that the strength of materials is not the key to distinguish high-strength bolts from ordinary bolts.

　　2?

　　Where is the strength of high-strength bolts?

　　According to GB50017, calculate the tensile and shear strength of a single ordinary bolt (Class B) with Grade 8.8 and a high-strength bolt with Grade 8.8.

　　Through calculation, we can see that the design values of tensile strength and shear strength of ordinary bolts are higher than those of high-strength bolts under the same grade.

　　So where is the “strength” of high-strength bolts?

　　In order to answer this question, it is necessary to study the law of elastic-plastic deformation of two kinds of bolts from the design working state, and understand the limit state of design failure.

　　Stress-strain curves of ordinary bolts and high-strength bolts under working conditions

　　Limit state of design failure

　　Ordinary bolt: the screw itself has plastic deformation exceeding the design allowable, and the screw is sheared.

　　For ordinary bolted connections, there will be relative slip between the connecting plates before they begin to bear shear force, and then the bolt rod will contact with the connecting plates, which will cause elastic-plastic deformation and bear shear force.

　　High-strength bolt: The static friction between the effective friction surfaces is overcome, and the two steel plates are relatively displaced, which is considered as failure in design.

　　When high-strength bolts are connected, the friction bears the shear force first. When the load increases to the point where the friction force is not enough to resist the shear force, the static friction force is overcome and the connecting plates slide relatively (limit state). However, although it is damaged at this time, the bolt rod is in contact with the connecting plate, and it can still bear the shear force by using its own elastic-plastic deformation.

　　Myth 2:

　　High bearing capacity is high strength bolt?

　　From the calculation of a single bolt, it can be seen that the design strength of high-strength bolt in tension and shear is lower than that of ordinary bolt. The essence of its high strength is that during normal operation, the joint is not allowed to slip, that is, the elastic-plastic deformation is small and the joint stiffness is large.

　　It can be seen that the joints designed with high-strength bolts may not necessarily save the number of bolts under the given design node load, but they have small deformation, high stiffness and high safety reserve. It is suitable for the main beam, and other positions that require greater joint stiffness, which conforms to the basic seismic design principle of “strong joints and weak members”.

　　The strength of high-strength bolts lies not in the design value of their own bearing capacity, but in the high stiffness, high safety and strong damage resistance of their designed joints.

　　three

　　Comparison between high strength bolts and ordinary bolts

　　Ordinary bolts and high-strength bolts have great differences in construction inspection methods because of their different design stress principles.

　　The mechanical performance requirements of ordinary bolts of the same grade are slightly higher than those of high-strength bolts, but high-strength bolts have one more acceptance requirement for impact work than ordinary bolts.

　　The marking of ordinary bolts and high-strength bolts is the basic method to identify bolts of the same grade on site. Because the values of torque calculation for high-strength bolts in British and American standards are different, it is necessary to identify the bolts of the two standards.

　　Ordinary bolts are about 70% of the price of high-strength bolts. Combined with the comparison of their acceptance requirements, it can be concluded that the premium part should be to ensure the impact energy (toughness) performance of materials.

　　In today’s digital age, hotel smart advertising machines are showing diverse and surprising uses, bringing guests a richer, more convenient and enjoyable experience.consequently interactive board I also got a lot of attention and wanted to join the ranks. https://kingonevision.com/

　　The diverse uses and charm of hotel smart advertising machines

　　Entertainment Videaos and User-Generated Content

　　Wherever they are, people always crave fun and entertaining elements to participate in. For hotels, if you want to provide entertainment content for guests and light up the atmosphere of the hotel lobby, playing videos or social media playlists on smart advertising machines is a great choice.

　　You can carefully create a travel blog playlist covering the best tourist attractions around the world or in your local area. Not only that, even in the hotel room, you can play exciting and entertaining movies through smart advertising machines, allowing guests to enjoy an audio-visual feast while relaxing.

　　Flight and travel information display

　　In the hotel environment, using smart advertising machines to display the latest travel information is another effective way.

　　You can easily check the real-time dynamics of flights, accurate information about nearby bus and train stations, or other key travel-related information. This allows guests to plan their trips in advance, check the time before leaving the hotel, and easily get the location of nearby bus stations or public transportation to reach their next destination.

　　Digital Concierge

　　As the digitalization of the hotel industry accelerates, hiring a virtual concierge is an ingenious way to connect guests with the local community. Hotel virtual concierges present the latest information in real time through digital signage solutions on smart advertising machines.

　　You can use a custom-designed virtual concierge image library in the hotel lobby to turn smart advertising machines into virtual concierge kiosks to greatly enhance the guest experience.

　　In addition, you can also use smart advertising machines to display photo slideshows, present the hotel’s dining features and complete facilities in all aspects, and provide guests with detailed information at their fingertips, thereby comprehensively improving the overall guest experience.

　　In short, the uses of hotel smart advertising machines are rich, attractive, efficient, practical and convincing. By cleverly using these smart advertising machines and pursuing a high return on investment, you can maximize their value, add points to the hotel’s service quality, and attract more guests.

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Cairo, March 23 (Reporter Yao Bing) United Nations Secretary-General Guterres once again called for an immediate ceasefire in the Gaza Strip when he visited the Egyptian side of the Rafah crossing between Egypt and the Gaza Strip on the 23rd.

Guterres said at a press conference held at the Rafah port: An immediate humanitarian ceasefire is needed now more than ever. It’s time for the gunshots to die down.

Guterres said that there is no reason to justify the attack on Israel by the Palestinian Islamic Resistance Movement (Hamas) on October 7 last year, nor can there be any reason to justify Israel’s collective punishment of the Palestinian people. Palestinians in the Gaza Strip remain in endless nightmares. Communities and houses were destroyed, families were devastated, and people were plagued by hunger. He expressed regret that Israel continued to encircle the Gaza Strip during the Muslim Ramadan.

Guterres said the United Nations will continue to work with Egypt to ensure aid reaches the Gaza Strip. He expressed appreciation for Egypt’s full support for the people of Gaza.

According to data released by the Palestinian Gaza Strip Health Department on the 23rd, since a new round of Palestinian-Israeli conflict broke out on October 7 last year, Israeli military operations in the Gaza Strip have caused more than 3.21 million deaths and more than 740,000 injuries.

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The second Room N incident broke out at Seoul National University in South Korea. According to South Korean media reports on May 22, as of now, as many as 61 female victims have been confirmed, including 12 students at Seoul National University.

The Seoul Police Department has so far arrested five gang suspects, two of whom are graduates of Seoul National University. They are suspected of making and privately spreading them on the instant messaging software T from July 2021 to April this year. Pornographic photos or videos synthesized using deep counterfeiting technology.

According to the police, in the process of arresting the main offender Park, the private reporting group Tracking Group Sparks, which first reported the incident in Room N five years ago, provided decisive assistance. Yuan Enzhi, who was in the pursuit team, disguised himself as a male, entered the private live broadcast room to lurk for two years, and contacted Park. This year, he lured Park to meet offline to help the police successfully capture him.

　　FR307 is a fast recovery diode, which encapsulates DO-27/DO-201AD. The main feature of fast recovery diode is its short reverse recovery time, which is especially suitable for high-frequency rectification. Next, let’s introduce the parameters in detail.period pcb instant quote Many adjustments have also been made, and the direction of product research and development has been reversed, in order to better meet the market demand. https://www.xinyun-ic.com/

　　Specification: Click to download specification.

　　Maximum peak reverse voltage: 1000V V.

　　Maximum rms voltage: 1000V v.

　　Maximum average forward rectified current: 3.0A

　　Maximum instantaneous current: 3.0A

　　Forward voltage drop: 1.3V

　　Maximum reverse recovery time: 500ns (nanosecond)

　　Maximum reverse DC current ta = 25≧: 5.0ua.

　　Rated DC blocking voltage Ta=100≧150uA

　　Working temperature Storage temperature: -65+150≧

　　Weight: 1.10 grams

　　Reverse recovery time test conditions: if = 0.5A, IR = 1.0a, IRR = 0.25a

　　Measure the reverse voltage applied at 1MHz and 4.0V D.C

　　Polarity: The color band indicates the negative pole.

　　FR307 positive and negative electrodes

　　Package: DO-27/DO-201AD (they have the same size, but different names).

　　DO-27/DO-201AD package

　　Specification:

　　Friends or customers have been asking me what is the difference between Schottky diode SR540 and SB540. Today we will talk about this problem.understand pcb instant quote In order to better serve customers and reflect the core competitiveness of products. https://www.xinyun-ic.com/

　　In fact, the parameters of SR540 and SB540 are the same, both of which are 5A 40V. As for why the models are different, it is because different manufacturers have differences in screen printing, which means they don’t want to repeat with others and have their own uniqueness. Please see below for specific parameters.

　　Maximum reverse repetitive peak voltage: 40V

　　Maximum DC blocking voltage: 40V

　　Maximum average forward rectified current: 5.0A

　　When current =5.0A, voltage drop: 0.55v

　　Maximum reverse DC current ta = 25≧: 0.5ma.

　　Working temperature range: -65 to +150≧

　　Storage temperature: -65 to +150≧

　　Reverse recovery time: less than 10ns (nanosecond)

　　High temperature welding: 250c/10 sec, 0.375 “(9.5 mm) lead length, 5 lbs (2.3kg) tension.

　　Package: DO-27/DO-201AD

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According to a Reuters report on March 13, Russian President Vladimir Putin warned the West that Russia is technically ready for nuclear war. If the United States sends troops to Ukraine, it will be regarded as a major escalation of the war.

Putin accepted a joint interview with Russian Channel-1 and Russian News Agency on the 12th. A program about this interview was officially broadcast on the 13th.

The report said that when answering the question whether Russia is really preparing to fight a nuclear war, Putin said: From the perspective of military technology, we are certainly ready.

Putin pointed out that the United States understood that if it deployed U.S. troops on Russian territory or in Ukraine, Russia would view the move as intervention. So while I don’t think this is all rushing towards (nuclear confrontation), we are ready for this, he said.

The conflict in Ukraine triggered the most serious crisis in Russia’s relations with the West since the Cuban Missile Crisis in 1962. Putin has repeatedly warned that if the West sends troops to fight in Ukraine, it may trigger a nuclear war.

Putin reiterated in the interview that the use of nuclear weapons is something that has been clarified in the Kremlin’s nuclear policy, which sets out the circumstances in which Russia may use nuclear weapons.

Putin said: Weapons exist to use them. We have our own principles.

The report also said that regarding the conflict in Ukraine that has lasted for two years, Putin said that Russia is ready to hold serious talks on the Ukraine issue.

Putin said: Russia is ready to negotiate on Ukraine, but negotiations should be based on reality, not on aspirations after using psychotropic drugs.

Reuters reported last month that Putin’s proposal to cease fire in Ukraine to freeze the war was rejected by the United States after intermediaries between Russia and the United States approached.

The report mentioned that he also said in an interview that if the United States conducts nuclear tests, Russia may do the same.

He said: It may not be possible that we will still consider this issue, but I do not rule out the possibility that we will do the same. (Compiled by Long Jun)

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Gaza, July 16 (Reporter Huang Zemin) The media office of the Palestinian Islamic Resistance Movement (Hamas) issued a statement on the 16th saying that the Israeli Air Force airstrikes a school in the Nusayat refugee camp in the central Gaza Strip that day, killing at least 23 people and injuring 73 people.

The statement said the school is affiliated with the United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA). There are more than 10 UNRWA schools in the Nusayrat refugee camp, housing more than 80,000 displaced refugees.

The statement said that the Israeli Air Force also carried out air strikes in the Mawasi area of Khan Younis in the southern Gaza Strip that day, killing at least 17 people and injuring 26 others.

The Israel Defense Forces issued a statement on the 16th, saying that the Israeli Air Force attacked terrorists in an UNRWA school in Nusayriat. These terrorists had planned many attacks against the Israeli army. In addition, the Israeli Air Force also attacked a Palestinian Islamic Jihad officer in western Khan Younis.

Since the outbreak of a new round of Palestinian-Israeli conflict on October 7 last year, Israeli military operations in the Gaza Strip have killed more than 380,000 Palestinians and injured more than 890,000 others.