8 pictures to give you a thorough understanding of transistor switching circuits

One of the functions of a transistor (transistor) is to act as a switch, using its cut-off characteristics to realize the switch function. However, many people do not understand the switching function of the triode very well. The following 8 example pictures vividly illustrate the function of the triode as a switch.

One of the functions of a transistor (transistor) is to act as a switch, using its cut-off characteristics to realize the switch function. However, many people do not understand the switching function of the triode very well. The following 8 example pictures vividly illustrate the function of the triode as a switch.


low side switch

8 pictures to give you a thorough understanding of transistor switching circuits


high side switch

8 pictures to give you a thorough understanding of transistor switching circuits


base resistance

8 pictures to give you a thorough understanding of transistor switching circuits


NOT gate circuit

8 pictures to give you a thorough understanding of transistor switching circuits


AND gate

8 pictures to give you a thorough understanding of transistor switching circuits


OR gate

8 pictures to give you a thorough understanding of transistor switching circuits


H bridge

8 pictures to give you a thorough understanding of transistor switching circuits

8 pictures to give you a thorough understanding of transistor switching circuits



8 pictures to give you a thorough understanding of transistor switching circuits

The Links:   LM190E08-TLL1 DG32240-13

Laser marking machine create fashion dress in summer

Laser marking machine create fashion dress in summer

In summer girls like cloths cut with special style like strapless, sleeveless jacket, side hollow, carved back, deep V etc. Do you also love cloth design of various tailors? Now, let’s see how to make various clothes this summer.

▇ Unrestrained enthusiasm of short jeans
Jeans is permanent representative of fashion. Girls like wearing white shirt and short denim or skirt in summer, showing youth and beauty. Various designs like cat whisker, burning flowers demonstrate youth, hot and leisure. Fashionable jeans show unrestrained enthusiasm of summer.
Recommended Laser Equipment:
Han’s Yueming MC250-DJ-A denim laser marking machine

MC250-DJ-A laser marking machine is a machine designed for garments and shoes like denim, leather and shoes. The whole machine adopts modular design showing strong compatibility among laser generators with different watts, and automatic exchange desk and high projector positioning can improve the feeding speed and convenience of operator.

▇ Flexible, stylish and comfortable fabric bra
Bra has been a very important aspect. Girls who want graceful figure need fashionable cloth and bra is an extremely important part. And as the most secretive fashion item, bra never falls behind. Various tailors and carve give women confidence and comfort.
Recommended Laser Equipment:
CMA1610-FV-B automatic feeding positioning laser Cutting Machine

It equips with lathed honeycomb crawler feeding system whose friction factor is large and easy to feed, which greatly improves the feeding accuracy. And motion system uses automatic camera positioning system, which can automatically search material positioning point and cut accurately.

▇ Beauty of hollow chiffon skirts
For many years, chiffon is always favorite garment material in summer like Lady-style chiffon shirt, elegant chiffon dress, as well as the charming chiffon dress etc. Girls who want to become beautiful fairies would choose chiffon dress. Unique lace trim and backless design have been favored by women.
Recommended Laser Equipment:
CMA1810-F automatic feeding laser cutting machine

Mechanical components equipped with imported gear and rack movement transmission system ensure high accuracy. Machine-level rolling processing platform is stable and reliable with automatic loading and unloading system which is suitable for high-strength, high-accuracy large-quantity processing requirements, widely used in automatic feeding cloth cutting.

▇ Perfect collocation of leather shoes and bags
In addition to the glamorous costumes, beautiful shoes and bags is also major attraction. In summer, women's favorite high-heel shoes, handbags, backpacks etc are likely to attract attention, particularly noble glamorous leather. Carved flat shoes, hollow heels, lace handbag etc may win your favor. Beautiful girls also need leather shoes and bags.
Recommended Laser Equipment:
MC275-D-A Triaxial dynamic laser marking machine

Leading triaxial marking system ensures high-speed operation for a long time and enclosed design and hydrodynamic design also protects body from laser radiation. It is widely used in denim laser burning flowers, leather hollow etc.

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CNC lathe/machining center technician, senior technician certification assessment

After decades of continuous development in my country’s cnc machine tool industry, especially in recent years, benefiting from the strong support of major national science and technology projects, cnc machine tool products have accelerated the pace of upgrading, and a large number of medium and high-end CNC machine tool innovations have emerged, forming a good The basis of development. However, there is still a long way to go in terms of product quality, product development, application field research, brand promotion, marketing methods, service specialization, etc., especially the ability to provide users with a complete set of solutions.

The rapid advancement of CNC technology and the strong growth of the high-end market provide an acceleration engine for the technological progress of CNC machine tools. The current development of CNC machine tools in the world mainly has several trends such as high precision and precision retention, high speed and efficiency, high reliability, composite and flexible, green and intelligent. Among them, intelligence is the general direction of manufacturing technology development in the 21st century. The intelligence of the machine tool makes it have the ability to adapt to the control, which can optimize the processing procedure and achieve the best processing quality in the shortest time, thereby improving processing efficiency and reducing labor intensity.
The gap that exists

At present, my country’s CNC machine tools are in a stage of rapid improvement. In recent years, more than 100 types of high-end CNC machine tools have been developed for the manufacturing fields of aviation, aerospace, automobiles, ships and power generation equipment, but there is still a big gap compared with foreign advanced machine tool manufacturers.

One is the backward manufacturing equipment and management technology, and low product quality and reliability. There are few types of precision manufacturing equipment, low precision retention, low level of automation and poor environmental protection. The enterprise’s awareness of quality competition is not deep enough, the quality and safety guarantee system is not perfect, and the quality management ability is weak. This has become one of the main reasons for the poor quality, reliability and accuracy of the products manufactured by the enterprise.

Second, the technical level and innovation ability are not high, and the overall product competitiveness is not strong. At this stage, most of the sources of advanced technology of CNC machine tools in my country are through the introduction, digestion and absorption of foreign advanced technology. The overall situation is still in a state of technology tracking, and the investment in digestion, absorption and improvement is far from enough. Independent research and development capabilities in the design technology, manufacturing technology, test technology, integration technology and user process research of the high-efficiency, flexible, precision machine tool host and key functional components need to be strengthened, and the high-performance CNC system and intelligent technology are not mature enough; The standard level is low, the industry implementation is not comprehensive enough; the product performance and reliability are not high, and the brand’s added value is low, which affects the market competitiveness.

Third, the specialized supporting system of CNC system and functional components is not perfect, and it still relies on imports. The key functional components such as medium and high-end CNC systems and precision high-power electric spindles that play a decisive role in the function and performance of CNC machine tools, and advanced core technologies with independent intellectual property rights are still to be developed, and therefore, a complete technology chain and industrial chain have not been formed. The chemical division of labor is not clear, and it is still difficult to meet the application needs of high-end CNC machine tools. So far, most of them still rely on foreign imports.

Fourth, the resource consumption in the manufacturing process and application process is large, and the comprehensive utilization rate of the machine tool is low. The manufacturing process of CNC machine tools is a process of converting raw materials into products through the consumption of energy and resources. Due to the relatively backward manufacturing equipment, inadequate technology and low management level in the machine tool industry, the parts processing accuracy is low, the working hours are long, the rate of unqualified products and rejects is increased; the power consumption in the manufacturing process is large, and the resource utilization rate of the entire production process is low. Lead to high manufacturing costs.

At the same time, the application of lightweight design technology is less, and the energy saving and harmlessness of the product are insufficiently considered, resulting in the high comprehensive energy consumption, material consumption, and pollutant emissions during the use of the product; plus the optimization of cutting processing technology and user process research Not enough work has been done to make the overall utilization rate of the machine tool lower.

Fifth, the service level and service quality are low, and the ability to provide overall solutions needs to be enhanced. CNC machine tools are products with high value and long service life. The user purchase frequency is very low, causing many machine tool companies to emphasize marketing rather than service, ignoring the importance of product quality and production efficiency. In addition, the company’s own management capabilities and execution are poor, and it lacks good brand support. The added value of products and the level of product services are low, which cannot drive the company’s profit growth.

The most important thing for users is to purchase machine tools at the lowest cost and be able to produce high-quality products. Domestic CNC machine tool companies are still unable to meet the needs of processing high-quality products with the lowest single-piece manufacturing cost in terms of providing comprehensive solutions for user processing, as well as reasonable machine tool configuration and optimized processing technology.

How to break the game

Innovation is the soul of a nation’s progress, an inexhaustible driving force for the country’s prosperity, and the only way for an enterprise to grow. my country’s CNC machine tool enterprises urgently need to make breakthroughs in independent development in basic common technologies and key technologies. They should focus on the development of energy-saving, environmentally friendly, reliable, efficient and intelligent high-performance products, increase the technical content of products, and improve the level of green design and manufacturing. , Innovate service models, reduce resource consumption, reduce environmental pollution, and focus on the joint improvement of economic and social benefits.

In recent years, the state has issued a series of policies in major technical equipment, major special projects, common technology research, basic technology and equipment, equipment import and export, etc., which benefit the CNC machine tool industry and play a positive role in promoting.

CNC machine tool companies should make full use of the country’s favorable policies, take product quality as the foundation of development, promote product upgrades with technological innovation, achieve leapfrog development through the combination of independent growth and foreign cooperation, and improve service capabilities based on user needs. Strive to build a corporate culture and national brand with its own unique connotations, gradually realize the transition from “production-oriented manufacturing” to “service-oriented manufacturing”, continuously improve the capabilities and levels of modern manufacturing services, and create a CNC machine tool industry that provides full life cycle services .

The basic requirements for CNC machine tools in the manufacturing industry are high precision, high efficiency, low energy consumption, high equipment utilization, and environmental friendliness. Therefore, CNC machine tools should have a wide range of processing, good flexibility, and have the characteristics of modularization, green, information, intelligence and low cost to meet the needs of sustainable development of the manufacturing industry.

CNC machine tool companies should actively invest in the construction of an innovation platform that combines production, education, research and application, and develop innovative designs led by integrated innovation on the basis of experiments. Promote the progress of manufacturing process with new product technology, promote the development of new products with new materials and new process technologies, lay the foundation for product innovation with basic common technology research, and drive technological development with the development of key core technologies of high-precision machine tools; informatization and integration Technological advancement of modernization, intelligence and greening improves production efficiency and strives to improve independent innovation capabilities; demand-oriented, strive to break through core technologies and key common technologies, and promote product technology to rise rapidly to new heights.

It is necessary to gradually establish process research laboratories with enterprises as the main body, explore new processing methods, accumulate and optimize cutting parameters and build corresponding databases, carry out software development and application test research of control systems, break through core technical bottlenecks, and break foreign technology blockades and trade barriers. Improve product application technology capabilities, provide users with overall solutions, and enhance users’ confidence in use.

CNC machine tool companies should standardize and streamline the user service process, regard ensuring the stability of machining accuracy and reducing failure rates as basic requirements, regard user service behavior as an extension of product value, and reduce single-piece manufacturing costs as the ultimate service for users. the goal.

Through their own efforts and national promotion, CNC machine tool companies in my country have strengthened their internal skills in terms of improving the level of machine tool manufacturing and product quality, actively strengthening the construction of innovation platforms, and providing marketable advanced products for the market; from procurement, production, sales, and management. In terms of business promotion and user services, we should promote ourselves, expand services, create a good brand effect, and achieve sustainable development by using limited resources in a planned way, strengthening internal cost control, and enhancing market competitiveness.

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slider and cam

Sliders :after plasticmold open,the cam and sliders have the relative movement trend, which trend makes the slider has 2 movement directions ,
opening direction and the horizontal direction .then the undercut could be released from the mold.




Suitable for thin mold plate and upper fixed
plate screwed with the A plate with
longer march surface , better stability





Suitable for thick mold plate , the big mold space,two-plate mold and three plate mold
Matching surface L≧1.5D(D cam  diameter )
better stability





Suitable for thick mold plate , two-plate mold and three plate mold,
mating surfaces L≧1.5D(D cam diameter )
Poor stability,hard machining.





Suitable for thin plate ,clamping plate and A plate could be separated.
longer mating surfaces, better stability

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What does the smartphone’s 3D scanning function mean for 3D printing

Among billions of devices in the world, 3D scanning on smartphones can make 3D scanning a technology that many people use daily. More importantly, the native 3D scanning function allows us to sculpt objects out of thin air or customize objects through simple applications.

In fact, this will allow the power of software to solve our problem, that is, no one can model anything in 3D. For everyone involved in 3D Printing, they need a simple way to input their designs and ideas on twitter.If we are also concerned about mass customization, it is currently being restricted. It requires effort to go to the store for 3D scanning. If your phone is an excellent 3D scanner, you can scan itself. If 3D scanning can be used on all mobile phones, then mass customization will be a kind of idle time technology that can be seen everywhere, and it will be instantly satisfied. Mobile phone-based 3D scanning will be the best and biggest thing that can happen in our industry, not just our own efforts to improve ourselves.Now, 3D scanning on mobile phones has been achieved to some extent. Apple’s new iPhone supports many scanning functions, which may have a huge impact on us. Software support for STL and object recognition through 3D scanning will also have an impact. In terms of hardware, the neural engine of the A14 chip will make machine learning applications possible. The chip also has 30% graphics performance and faster image processing speed, which will be very convenient for scanning applications.

The TrueDepth camera supports facial recognition. In 2017, this is a structured light scanner using an infrared projector. At the same time, on the other side of the ApplePro model, we can see three cameras (main camera, wide camera and telephoto camera) and lidar. Lidar is a 3D scanning technology that is most commonly used for objects the size of buildings or rooms. Apple seems to want to deploy it to truly bring augmented reality objects into our living rooms, or to enable room-sized scanning applications. It has a time-of-flight scanner that can accurately measure distances and capture scenes within 5 meters.

For Apple, it will be very important to be able to move realistically in a game environment and try products in a virtual environment. At home, as long as you can see how big the TV you see on the Internet, or can virtually see whether your new standing desk is suitable for your house, it can have a very big impact on e-commerce. Virtual fittings can also have a huge impact, as online buyers will return approximately 40% of the clothes purchased online.

At the same time, the level of detail required for 3D Printing may not yet appear. The number of points may not be enough. It is not clear whether we can extract a point cloud or how to fix this point cloud will work.

Currently, for Apple, ultra-precise measurement and scanning of the space will open up the entire AR world and provide many functions in the app, such as: trying new paint colors, calculating the number of wallpapers needed, suitable for a new kitchen , 3D scanning and eBay objects, calculating actions, singing with FrankSinatra, placing yourself in movie scenes, 3D emojis, etc. Because the virtual and application functions are so powerful, Apple’s main attraction seems to lie in space, not necessarily with high accuracy for softball-sized objects. With commercial advantages mainly in terms of spatial accuracy, we may find ourselves a neglected Cinderella in 3D printing. With e-commerce, the successors of augmented reality and gaming have acquired all the technologies aimed at them.

Better “augmented reality” or the lead based on “augmented reality” games may become the future of the game industry, and Apple will certainly not miss it. Let us not forget that there is another very important reason for mobile scanning on mobile phones: to improve selfies. Although we often think that we are the center of the world in the field of 3D printing, better selfies and better pictures are a huge victory for Apple that will make them more competitive when competing with Samsung and others.

Although there is currently no comprehensive 3D printing support, there are many ways to solve this problem, and they are very fruitful. With the improvement of computing power and the success of generative learning, it is likely to achieve more. This software can help clean up and rebuild files to make them watertight and versatile for us to print. Eventually, someone will be able to extract enough details from the AppleiPhone scanner to print, which will allow many people to unleash their creativity. However, we can now do some joint roads that may actually lead us to the world of 3D printed Apple phones.

Although we are not sure that this will solve the problem 100%, in general, although we may not be able to extract many 3D printed images from the iPhone LiDAR data immediately, it is still possible in the end. In the short term, for certain high-contrast materials and objects, plus good reference objects, we can use this technology to perform 3D scanning on certain 3D printable objects.

In the past, people were always guessing when or whether to apply 3D scanning to mobile phones. In this regard, when Apple acquired several 3D scanning companies and Google’s Project Tango, endless discussions arose. But as the discussion about the acquisition of PrimeSense in 2013 attracted much attention, the acquisition of LinX in 2015 caused a lot of speculation. The TrueDepth camera will change everything in 2017, and ARKit has always excited us because of object recognition and image reconstruction. It will also benefit 3D printing.

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