Shenzhen ZTRON Microelectronics Co., Ltd
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0755-8299 4126
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07-18
2021
What is the difference between ammeters in series and parallel?
Are the ammeters connected in series or parallel? An ammeter is connected in series in a circuit. An ammeter refers to an instrument used to measure current in AC and DC circuits. In the circuit diagram, the symbol for the ammeter is; circled with an "a";. The current value is represented by "a", or "A"; it is the standard unit in which the current meter is based on the action of magnetic field forces on a charged conductor in a magnetic field.There is a permanent magnet inside the ammeter that creates a magnetic field between the two poles. There is a coil in the magnetic field and a spring at both ends of the coil. Each spring is connected to one terminal of the ammeter. There is a rotating shaft connected between the spring and the coil, and the rotating shaft is related to the current. There is a pointer on the front of the instrument. When the current passes through the magnetic field along the spring and rotating shaft, the current cuts off the magnetic induction line. Therefore, under the action of the magnetic field force, the coil deflects and drives the rotating shaft and pointer to deflect.Since the magnitude of the magnetic field force increases with the current, the magnitude of the current can be observed through the deflection of the pointer. This is called a magnetoelectric ammeter, and it's what we usually use in the laboratory. In junior high schools, the use range of ammeters is generally 0~0.6A and 0-3a. Precautions for using ammeters:1. Wiring is correct. When measuring current, the ammeter should be connected in series with the circuit under test; when measuring voltage, the voltmeter should be connected in parallel with the circuit under test. When measuring DC current and voltage, you must pay attention to the polarity of the instrument to ensure the accuracy of the instrument. The polarity should be consistent with the measured polarity.2. High voltage and large current measurement. When measuring high voltage or large current, a voltage transformer or current transformer must be used. The range of the voltmeter and ammeter should be consistent with the secondary rating of the transformer. Generally, the voltage is 100V and the current is 5A.3.Expand the range. When the voltage measured in the circuit exceeds the range of the meter, an external shunt or voltage divider can be used, but note that its accuracy level should be consistent with that of the meter.4. In addition, it should be noted that the use environment of the instrument should meet the requirements and be kept away from external magnetic fields.
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07-17
2021
What is the principle of dictionary pen?
Many parents and netizens know about dictionary pens, but many people don’t know what the principle of dictionary pens is. As a veteran developer of dictionary pens, the editor of Zuchuang Technology is obliged to share the principles and benefits of this AI smart children’s dictionary pen.The principle of dictionary pen:The main reason why the dictionary pen can read various books and picture books is because the dictionary pen can identify black spots on the book paper. From a professional point of view, it is achieved by relying on the tip of the dictionary pen to recognize the OID code (dense black dot) placed on the book, and at the same time placing the corresponding dictionary pen on the dictionary pen.There is a camera on the tip of the dictionary pen, and there will be a layer of code (OID code) on the surface of the book you click on. For example, a camera can recognize it by scanning the code. After scanning the code, it will automatically convert into a sound specific to the OID code. This It is the principle of the sound of the dictionary pen.The technologies used in the dictionary pen include: OID invisible code technology; DSP digital information processing technology; FLASH digital flash memory technology; COMS image processing technology; watermark encoding technology; high-resolution optical recognition module technology MP3 audio processing technology; 128-bit dynamic encryption and other technologies.What are the benefits of dictionary pens:The dictionary pen allows children to learn Chinese, mathematics, English and other subjects at the same time, improving their performance. The emergence of the dictionary pen allows children to hear the voices of famous teachers at home, enjoy high-quality education, and correct incorrect accents in time, which can quickly improve their speaking level and increase their interest in learning.In fact, as early as 2007, the dictionary pen product successfully introduced the dictionary pen to the children's market and detonated the domestic market at that time.As technology develops, the company seizes opportunities and launches products that use new technologies to support cloud big data. For example, cloud technologies are used for speech recognition, multi-national translation, OCR, TTS, oral assessment and subsequent development of simulated examination rooms, etc. Let consumers enjoy the practical convenience and practicality brought by technological development.
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07-16
2021
How to set the current transformation ratio of a digital ammeter?
The transformation ratio of the current transformer is selected according to the range of the measured current and the change of the main circuit current. Current transformer primary current/secondary current (rated 5a). For example, a transformer with a ratio of 100/5 (20 times) is a current-input ammeter that turns 100A of current into 5A. At this point, set the "current conversion ratio" option to 20 in the digital display ammeter, and the ammeter will display the actual measured value. How to set the current transformation ratio of a digital electricity meter?There is a setting item [Current Transformation Ratio] in the digital display panel:1. Enter this option first.2. If the nominal current input of the selected ammeter is 1a, and the current conversion ratio is 30/1, enter 30 in the [Current Conversion Ratio] option, and then save the value. Likewise, if 50/1, enter 50.3. If the nominal input of the selected ammeter is 5A, and the transformation ratio of the ammeter is 30/5, enter 30÷5=6 in the [Current Transformation Ratio] option, enter the value 6, and then save the value. Likewise, if it's 50/5, enter 50÷5=10, enter the value 10, and save the value.Shenzhen Zuchuang Microelectronics Co., Ltd. has professional hardware design and software program development capabilities. It is a high-tech enterprise unit. Its service areas include: professional dictionary pen, intelligent electronic product development, endoscopic visual ear digging solution development, IOT Internet of Things Platform design, smart home system solution development, toy design, PCB circuit board design, Songhan microcontroller agent, TWS Bluetooth headset development. We can provide professional advice and reasonable quotations for the development needs of the above solutions.
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07-14
2021
The ultimate experience The smallest aircraft
New product launch! Mini, just to give you a more detailed experience!The smallest four-rotor remote control aircraft brought by the efficient R&D team of Shenzhen Zuchuang Microelectronics Co., Ltd. is here! The wheelbase is only 2.5x2.5 cm, but the weight is less than 10 grams. Although it is small in size, its flight functions are not bad at all. It has a built-in six-axis flight control system and a highly sensitive gyroscope, which can make difficult flight movements such as flipping, diving, and turning in circles. It comes with a highly penetrating LED indicator light that looks cool even in the dark!Lightweight design: The ultra-small main aircraft has a wheelbase of only 2.5x2.5 cm and weighs less than 10 grams, making it more convenient for you to carry it with you. You can fly it wherever you go, and have an easy-to-go trip!Remote control technology: Using 2.4Ghz spread spectrum remote control technology, the control is more precise, the anti-interference ability is stronger, the remote control distance is longer, and the response is more sensitive. The ordinary 2.4GMHz is susceptible to external interference. Built-in six-axis gyroscope can sense position changes and accurately position in the air, making it easy to take off!Cool lights: The four rotor ends are equipped with highly penetrating LED color indicators, which are bright but not dazzling. They do not affect the flight even in the night sky, and embellish the night sky with stars!Fall-resistant design: The fan blades are made of tough materials, which are wear-resistant and fall-resistant, and are not afraid of deformation or damage due to collisions.Convenient charging: For charging, it uses a USB interface and a built-in rechargeable lithium battery, so you no longer have to worry about insufficient power.Safety protection: There are removable protection devices on the four rotor ends, allowing you to fly safer and more assured.Indoor flight: Mini, streamlined, small and exquisite, but with equally outstanding functions, it can fly smoothly indoors and outdoors without any hindrance!Smart control: The unique ergonomic remote control design allows you to perform various flips, dives, circles and other difficult flight movements on the wireless remote control, making you unable to stop at all...Elite team: The high-looking R&D team members from Shenzhen Zuchuang Microelectronics Co., Ltd. are working hard...[Features of the innovative micro-quadrotor remote control aircraft solution]:Spread spectrum technology: Using 2.4Ghz spread spectrum remote control technology, the control is more precise, the anti-interference ability is stronger, the remote control distance is longer, and the response should be more sensitive. The ordinary 2.4GMHz is susceptible to interference.Six-axis gyroscope: The built-in six-axis gyroscope can sense position changes and accurately position in the air, making it easy to take off.Cool tumbling: simply flying left, right, up and down is too boring, show off new 3D tumbling, golden rooster independence and other stunts.Brilliant lights: The night turns into an elf, and the stars blink, making the night sky more beautiful.Headless mode: After entering the headless mode, the aircraft will change its flight direction as the remote control direction changes.One-click return: Just touch the button and it can be easily returned to your hands.Closed design: The aircraft motor and battery all adopt a closed design, making it smaller and easier to carry.Built-in battery: Uses 3.7V rechargeable lithium battery, which can be charged repeatedly.
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07-13
2021
TDDI chip war, Chinese manufacturers occupy core technology
TDDI technology is developing very rapidly. It only took four years from the concept in 2014 to the market boom in 2018. Now Synaptics, which was the first to propose a TDDI solution, has also sold its TDDI business to the Chinese company Weir.TDDI is Touch and Display Driver Integration. The touch and display functions of smartphones are independently controlled by two chips. The biggest feature of TDDI is that the touch chip and display chip are integrated into a single chip.The TDDI solution can significantly reduce the cost and volume of chip products, and occupy less PCB area for terminals. With the requirements of smart terminals for thin, light and short chips, touch display two-in-one has become a trend and is widely used in the field of LCD screen terminals. As a result, the TDDI market has grown rapidly.However, TDDI is currently mainly used in LCD screens of smartphones and has very few applications in AMOLED screens. On smartphones, AMOLED panels are gradually replacing LCDs. In the future, if TDDI chips need to ensure market share in the field of smartphones, It is necessary to overcome the technical difficulties in the application on the AMOLED screen. Of course, TDDI chips are also developing in the direction of interactive terminals, such as smart door locks, smart speakers, watches and other devices, and the future market prospects are promising.The development of TDDI chipsTDDI was first proposed by display touch chip manufacturer Synaptics. Once the solution was proposed, it was recognized by the majority of touch manufacturers and display manufacturers. Synaptics also launched a TDDI mass production solution for mobile phones and tablets in March 2015.However, although compared with the traditional solution of separating driver IC and touch IC, TDDI has the advantages of lower cost and simplified supply chain because it reduces the number of components and process steps of the traditional plug-in touch solution module, but in reality In the early days of launch, the price of TDDI chips was no lower than when the two chips were separated, and the touch function was not smooth enough, so the market share was low.As the mainstream market continues to pursue full-screen technology and low cost, issues such as the cost, supported resolution, and touch fluency of TDDI chips have been gradually solved and improved, and shipments have increased year by year. Data shows that global TDDI shipments in 2015 The shipment volume was only 8 million pieces, rising to 50 million pieces in 2016, 414 million pieces in 2018, and 515 million pieces in 2019. Taiwan's major manufacturer Novatek stated not long ago that the TDDI market size will grow to 650 million units in 2020, an annual increase of 18%.At present, global TDDI players mainly include Novatek, Duntech, Himax, Parade, etc. in Taiwan. South Korea's Samsung, SiliconWorks and other original driver IC manufacturers are also investing in the TDDI market. Mainland China's manufacturers of TDDI chip products are mainly Chiso North , Solomon Technology, but with the completion of the acquisition of Synaptics TDDI (display touch driver integration) business by Weir in April 2020, mainland China has gained a heavyweight TDDI chip manufacturer.Novatek Technology is a leading driver IC manufacturer in Taiwan. It entered the TDDI market in the second half of 2017. In the fourth quarter of 2017, its shipments reached 10 million units in a single quarter. From the second quarter of 2018, its shipments reached monthly 10 million sets. As TDDI products enter the flagship models of OPPO, Vivo, Xiaomi and other manufacturers, the top five brands in mainland China, and enter Huawei's supply chain, Novatek has gradually occupied a larger TDDI market share.Himax Optoelectronics announced in April 2016 that its TDDI chips were successfully verified on Chinese smartphone clients and began mass production and shipment. In January 2019, the company announced that its TDDI chips were successfully introduced into South Korea's first-tier smartphone brand manufacturers, automotive displays and other application products. Most of them were shipped to customers in 2019. As a result, Himax Optoelectronics estimated that its 2019 revenue will be as high as The market share increased exponentially compared with the previous year.With the company's launch of TDDI chips in 2017, Duntai took almost half of the mobile phone orders from mainland China, Japan and South Korea manufacturers in the second half of the year, and gained a larger market share. Hu Zhengda, chairman of Duntai, said at the financial report meeting on November 13, 2019, In addition to existing customers such as Huawei, ZTE, Xiaomi mobile phones and Baidu, LG, Amazon, etc., Facebook's PortalMini has also joined the adoption of Duntai IDC (commonly known as TDDI in the market).Parade entered the market late. In September 2018, it announced the launch of the TDDI chip TC3315 for smartphones, and worked with panel manufacturer Innolux to create an in-cell solution. According to Parade, the company's products use a 55-nanometer process and consume 29% less power than competing products. Parade acquired the touch division of international semiconductor giant Cypress a few years ago, which made the company even more powerful in touch technology and gave the company the opportunity to successfully enter the TDDI market and seize a place.In comparison, mainland China's TDDI technology is slightly inferior. Currently, the main products launched are ChipSoft and Solomon Systech. Chitron North is an overall solution provider for display control chips. According to its official website, the company has launched the country's first single-chip solution that integrates touch and display drivers (ITDTM) to fill the gap in domestic product technologies that are provided by major overseas manufacturers. blank. In addition, it is understood that the TDDI chips currently launched by Chitron North only support HD and HD+ resolutions, and there are no products that support FHD and higher resolutions. In addition, it is understood that the TDDI chips currently launched by Chitron North not only support HD and HD+ resolutions, but also products that support FHD and higher resolutions, and some products are mass-produced on OLED screens.Solomon Systech was established in 1999 by Huada Semiconductor and is a leading semiconductor company. According to news on August 14, 2017, Solomon Systech launched the latest touch display integrated (TDDI) IC-SSD2023U. SSD2023U is a breakthrough product in the industry, supporting Full High Definition+ (FHD+) (1080×2160) in-cell LTPS panel technology, supporting the new market trend: high-resolution smartphones with no borders and 18:9 screen aspect ratio. In addition, Solomon Systech SSD2092TDDI chip has been installed in the HTCU12Life mobile phone.The future market trend of TDDI chipsTDDI is currently mainly used in LCD screens of smartphones, and only a handful of applications are used in AMOLED screens of smartphones. For example, AUO and Ruiding have jointly used TDDI solutions on AMOLED screens of smartphones, and Samsung Galaxy Note10+ 5G mobile phones have Its SuperAMOLED screen also uses TDDI technology. In addition, industry insiders predict that Apple may test the TDDI solution on new mobile phones with AMOLED displays this year.Smartphones have high requirements for touch control. In order to avoid the touch layer from interfering with the AMOLED electrodes, the touch layer cannot be integrated into an in-cell design. Some people in the industry have previously mentioned that the main difficulty in implementing TDDI on smartphone AMOLED screens is that because IDC can reuse the Vcom electrode on the LCD, the screen manufacturer does not need to make any modifications to the current production line, making this technology so fast Popularization and mass production. However, the AMOLED panel structure and driving method are completely different from LCD, and the AMOLED driving circuit is more complex, has higher requirements on display charging time, and is more difficult to integrate touch functions.At present, OLED (divided into active AMOLED and passive PMOLED, and AMOLED is mainly used in display screens) is in a period of rapid growth. Its application market is mainly to replace LCD. The penetration rate of OLED is directly related to its cost, and its cost is directly related to Related to production yield. If the prices of components and materials are reasonable and the production yield exceeds 80%, the cost of OLED will be lower than that of LCD. Once the cost is lower than LCD, OLED will replace LCD on a large scale due to its performance advantages. In 2019, Korean media thelec reported that in the smartphone panel market, OLED panel shipments surpassed LTP LCD for the first time in the third quarter, reaching 144 million pieces.If OLED gradually replaces LCD, the application of TDDI in smartphone LCD screens will be reduced, and the shipments of TDDI manufacturers will inevitably be affected. The TDDI solution can reduce the number of components, eliminate lamination steps, and increase the output of suppliers, and is relatively Compared with DDI, it can reduce the overall cost of the system, so all TDDI chip manufacturers and major mobile phone brands attach great importance to implementing TDDI on AMOLED.summaryAlthough TDDI technology has not been developed for a long time, the market supply pattern is constantly changing. In 2019, the United States imposed a series of sanctions on Huawei. Huawei and other domestic brands became more cautious when choosing American companies. As a result, Synaptics lost the trust of domestic mobile phone manufacturers. Novatek benefited from some of the orders. After Vail acquires Synaptics' TDDI business, mainland China is also expected to re-collaborate with domestic manufacturers to seize TDDI orders from Taiwanese companies such as Novatek and Duntech, and its market share may increase significantly. In addition, after Weir acquires Synaptics' TDDI business, it will become more competitive in overcoming the difficulties of TDDI application in AMOLED screens.
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07-12
2021
Children's Tablet Market Analysis
No matter which field you are in, consumer demand will always drive market segmentation. Take the tablet industry as an example. In addition to ordinary tablets, there are also business tablets, student tablets, and children's tablets. This is not surprising. Children's education is now a family's top priority. If entertainment and learning can be satisfied at the same time, why not parents? There are so many children in the world, and the strong market demand has led to the gradual rise of children's tablet computer solutions, and a new consumption era has arrived.The dual-mode dual system of the children's tablet has received unanimous praise from parents and teachers. In child mode, children can only see what their parents want them to see and understand, completely isolating them from harmful information. In parent mode, it is still an Android platform tablet and can install independent applications of the Android platform for a full range of experiences. Enter the password to quickly switch modes. The dual mode forms true interoperability through the cloud-linked cloud platform. Manage Internet browsing in parent mode and browse the Internet in child mode; filter applications in parent mode and experience them in child mode; assign tasks to children in parent mode and complete tasks in child mode.Children's nature is to play, so games play an important role in children's growth. Playing some games while growing up is unconsciously preparing for future life. Children's tablets use games to help children master core learning skills, and at the same time provide children with a pure English learning environment, allowing children to learn in happiness and grow in play. The operating interface of the Zuchuang system is simple and intuitive, and the graphic design is vivid and easy to understand. It does not require excessive guidance from parents, and children can easily operate various design applications.The China Children's Industry Research Center summarized and analyzed the development status of domestic children's tablet computers in the 141st issue of "Children's Industry High-Level Decision-Making Reference". Zhongtongyan believes that the greatest value of children's tablets is that it provides children with a relatively safe way to understand the world, learn knowledge, and create themselves. Children's tablets play the dual role of "toys + education", providing both learning and entertainment; their hardware and content are specially customized for children's characteristics, making them sturdy and resistant to falling, and can help children learn; in addition, some experts point out that the biggest disadvantages of children's tablets are The value is not just the most basic learning, but providing a relatively safe and intuitive way for children to understand the world and learn knowledge.Looking at the development situation of children's tablets around the world, more and more brands are appearing in our lives, such as the American children's tablet giant Nabi and Samsung, which have also entered the ranks of children's tablets. Of course, there are also OEM brands from all over the world. As a leading domestic early education machine solution provider, Zuozhuang has not only achieved what ordinary children's tablet manufacturers have accomplished, but more than 80 engineers and technicians in the company have also developed new practical functions, such as the timed screen lock function, which can avoid game addiction and eyesight problems. Harm, keep children away from "sight killers".
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07-11
2021
High-definition visualization of the ear-picking endoscope, 6-axis precise ear-picking is great!
Are you still using metal earpicks to pick out your ears? Are you still using cotton swabs to pick out your ears? You are too OUT. It is now popular to use high-definition visual earpicking sticks to pick out your ears. What is said on the Internet is that the ear-picking endoscope is the same as the smart ear-picking endoscope. The ear pick actually refers to an ear picking stick, which is a tool for picking out ears. Of course, if you want to make picking comfortable and safe, the tool for picking out ears is very important.Common metal ear picks: Do you feel that your ears hurt even if you can’t clean them out? You don’t dare to go deep, and you can’t clean them clean. You are afraid of piercing the eardrum, and you are also afraid of piercing the ear wall and causing bleeding and infection. So, you are still using metal ear picks. Ear pick?Ear removal with cotton swabs: Ear removal with cotton swabs may seem safe, but in fact, if you use cotton swabs to remove ears, more and more earwax will accumulate! In severe cases, it can also cause ear canal damage, tinnitus, dizziness, poor hearing, and even puncture if you are not careful. Risks to the eardrum! Cotton swabs of poor quality may also shed cotton wadding during use, causing ear canal infection and inflammation. So, do you think it’s safe to pick out your ears with cotton swabs?Why do you feel that it is not safe to pick out your ears if they are not clean? The main reason is that the tool is not soft enough and you cannot see the ear canal clearly, so you can only pick blindly.The ear-picking endoscope has high-definition visualization of the ear-picking rod and 6-axis precise ear-picking, which solves the problem of unsafe, unclear, and unclear ear-picking situations.1. 6-axis high-definition and accurate ear picking, 360-degree viewing without blind spots, no shaking, and clear earwax and earwax.2. The ear scoop is made of PC+silica gel, so you no longer have to worry about damaging your ears by picking them out.3. 350mAh battery, supports 1.5 hours of fast charging, and can be used for about two months on a single charge.4. High-end Wifi chip, transmission Fengchi Dianqing (BYD chip)5. Non-sensory intelligent temperature control, automatic strong connection when turned on.6. Base accessories storage box for easy storage7. Magnetic charging base, plug in and charge8. High-sensitivity sensor, six LED lights, intelligent compensation algorithmShenzhen Zuchuang Microelectronics Co., Ltd. is an electronic and electrical solution development, design and chip agency company with 19 years of experience, focusing on the development of ear-extraction endoscopes, the development of high-definition visual ear-picking rods, the development of intelligent visual ear-picking rod solutions, and ear-extraction endoscope technology. Development, development and design of smart visual ear scoop solutions, we can provide MCU, voice IC, Bluetooth IC and modules, and wifi modules. The development capabilities cover PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development and other hardware and software design.
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07-10
2021
What is a quadcopter?
Quadcopter, also known as quadcopter, quadrotor helicopter, referred to as quadcopter or quadcopter. This quadcopter is a multi-rotor aircraft. The four propellers of a quadcopter are simple mechanisms directly connected to the motors. The cross-shaped layout allows the aircraft to obtain the force to rotate the body by changing the motor speed, thereby adjusting its attitude. Specific technical details are described in "Basic Movement Principles". Because of its inherent complexity, there has never been a large-scale commercial quadcopter in history. In recent years, thanks to the development of microelectromechanical control technology, stable quadcopters have received widespread attention, and their application prospects are very promising. Groupronics already has mature four-axis flight development solutions.A quadcopter is a system with 6 degrees of freedom in space (translation and rotation along three coordinate axes), but only 4 degrees of control (the speed of four motors), so it is called underactuated. System (a complete drive system is only available when the degree of freedom of control is equal to the degree of freedom of movement). But for the attitude control itself (rotating actions along three coordinate axes), it is indeed fully driven. Compared with helicopters, quadcopters can achieve fewer flying postures, but basic forward, backward, translation and other states can be achieved. However, the mechanical structure of a quadcopter is far simpler than that of a helicopter, and the cost of maintenance and replacement is also very small. This gives the quadcopter a greater application advantage than a helicopter.The small quadcopter can freely hover and fly in space. Move freely with great flexibility. In addition, because of its simple structure and good mechanical stability, it is low cost and highly cost-effective. The main applications are toys, model aircraft, and aerial photography, and new applications are also being continuously expanded.
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07-09
2021
How does the reading pen realize reading? What is the principle?
Point reading pen principleA Sensor (infrared photosensitive) + MCU + OID algorithm + special paint printing that reflects infrared light. This is the most basic software and hardware architecture of a reading pen! Simply put, it is a signal reading device + memory card + processing chip + There are coded reading materials + pronunciation equipment. The OID algorithm is a two-dimensional optical identification code that identifies different content through different combinations of codes. To put it simply, the key lies in the two-dimensional optical identification code + the reading pen that can recognize the code.Reading pen schematic diagramThe tip of each reading pen is a photoelectric identifier. The reading pen scans the QR code information on the book through the pen tip and sends it to the CPU for processing. If the CPU recognizes it successfully, the reading pen will scan the QR code information from the book. The pre-stored sound files are selected from the memory of the reading pen, and the sound is emitted by the earphones or speakers; if the CPU recognizes the error, the earphones or speakers will emit a sound that cannot be recognized, or prompt the user to change to other teaching materials.It can be seen that the most important core component of the reading pen is the CPU, which is the chip, followed by the photoelectric recognition and memory. Of course, the book is also an indispensable part of the reading pen, because the book must contain information that can be identified by the photoelectric recognizer. QR code.Seeing this, some friends may ask, why is it that reading pens are so expensive? A pen can cost as little as four to five hundred yuan, or as much as a thousand yuan. It turns out that it also has a CPU integrated into it.The CPU used in the reading pen is an embedded circuit chip. Its function is to read and convert the QR code information and then select the existing sound corresponding to the QR code in the memory.
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07-08
2021
Evolution of VR controllers: from finger tracking to hand tracking
As we all know, AR/VR is a product with strong interactive form, and the most widely used peripheral with intuitive interaction is the VR controller. Its interaction methods are mainly reflected in: 6DoF positioning tracking, button/touch interaction, tactile/vibration feedback, and finger track.Since consumer VR began to gain popularity in 2016, the interaction of consumer VR controllers has not been significantly upgraded. Although a number of VR glove products have been born, there are basically none that can achieve consumer-level applications. They are expensive and large in size with good experience. Moreover, there is no unified way to develop VR gloves as third-party peripherals other than VR headsets. Restricted by standards, the ecology is extremely chaotic.As for the differences in VR controllers, one of them is that Oculus Touch has built-in capacitive sensors that can simulate the pinching action of the thumb and index finger, but this is not perfect enough, and at the same time, its other products have almost no such function.But it is undeniable that finger tracking does make the VR experience better.Until the Valve Index controller was released in May 2019, it can be said that it officially brought the five-finger tracking function to the mass consumer-level VR peripherals. Currently, the Index five-finger tracking controller is suitable for any VR headset of the SteamVR solution, mainly Index and HTC products.Compared with Oculus Touch, the Index VR handle can provide a complete five-finger tracking mode, which is subdivided into the movements of each finger, and it is very smooth. This will make the experience of grasping in VR more immersive, and it can also Make the original VR viewing interactive experience richer and more interesting, and the experience is greatly improved.But this is not enough. We know that Oculus Quest already provides hand tracking function. Although it is still in the beta testing stage, its stability and user-friendliness are better than many official products.Currently, the gesture recognition function in Oculus Quest has been integrated into the system, and the system will automatically switch to gesture control mode when the controller is not connected. In some third-party hand tracking test apps, we can see that the Quest hand tracking effect is extremely smooth. Even if the hands have overlapping areas, the finger movements can basically be accurately restored.More interesting VR interaction methods: wristband/braceletIt is reported that the gesture technology in Quest originally originated from the Facebook Reality Labs department (hereinafter referred to as: FRL), which focuses on the research and development of VR technology and hardware. This department was the earliest Oculus Research. It was later renamed after Facebook's strategic adjustment was divided into the AR department and the Protal department. Qingting.com has previously reported on other research conducted by the FRL department, such as tactile feedback wristbands, VR gloves and input delay, virtual avatar systems, etc.Today we are going to talk about a “smart bracelet” from the FRL department: Tasbi. Of course, strictly speaking, it is a tactile feedback wristband. This project was first announced at the Visual Tactile Conference in July 2019. Recently, Facebook published a detailed research paper on the solution. The biggest improvement is the addition of two-handed mode.So you may have questions, since hand tracking is available and it works, do you still need a wristband? Of course it's possible.But this is not enough. We know that Oculus Quest already provides hand tracking function. Although it is still in the beta testing stage, its stability and user-friendliness are better than many official products.Currently, the gesture recognition function in Oculus Quest has been integrated into the system, and the system will automatically switch to gesture control mode when the controller is not connected. In some third-party hand tracking test apps, we can see that the Quest hand tracking effect is extremely smooth. Even if the hands have overlapping areas, the finger movements can basically be accurately restored.More interesting VR interaction methods: wristband/braceletIt is reported that the gesture technology in Quest originally originated from the Facebook Reality Labs department (hereinafter referred to as: FRL), which focuses on the research and development of VR technology and hardware. This department was the earliest Oculus Research. It was later renamed after Facebook's strategic adjustment was divided into the AR department and the Protal department. Qingting.com has previously reported on other research conducted by the FRL department, such as tactile feedback wristbands, VR gloves and input delay, virtual avatar systems, etc.Today we are going to talk about a “smart bracelet” from the FRL department: Tasbi. Of course, strictly speaking, it is a tactile feedback wristband. This project was first announced at the Visual Tactile Conference in July 2019. Recently, Facebook published a detailed research paper on the solution. The biggest improvement is the addition of two-handed mode.So you may have questions, since hand tracking is available and it works, do you still need a wristband? Of course it's possible.According to FRL research results, combining the three sensory feedbacks of vibration feedback, pressure feedback, and visual feedback can bring a more immersive and realistic experience to AR/VR content.In addition, Facebook also acquired CTRL-Labs, a brain-computer interface solution provider, in September last year. The latter's core advantage is to implement hand tracking functions through wrist-worn devices based on electrical pulse signals. There is no doubt that the goal of future Facebook research and development is to realize AR/VR brain control or other interactions non-invasively, and there is a huge room for imagination.It can be seen that the Tasbi wristband provides more possibilities for future AR/VR interactions, especially after the popularization of optical hand tracking solutions such as Oculus Quest, there is indeed a certain gap in the experience without a handle, and combining it with a wristband may It is the way of experience in the future, and it is even conceivable that Quest 2 will launch a version with a single head display and no handle, so that consumers can choose by themselves.Of course, Tasbi is still in the research stage and currently has many shortcomings. For example, the demonstration showed that it needs to be connected with multiple cables, and has not yet reached the consumer-level trend of wirelessization; at the same time, the current Tasbi entry and exit experience still requires a short period of calibration and cannot be used out of the box, and needs to be optimized.
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07-07
2021
Voice IC sound output method and Songhan IC function introduction
With the development of science and technology, many products will require the use of voice chips, and voice ICs are ICs that can store and control voice playback. Voice chip applications vary from industry to industry, and are divided into toy chips (used in the toy industry, such as AC80E5), doorbell chips (AC8DM32), OTP voice chips (AC8040), children's song ICs (AC8DE12), stroller ICs, etc. The specific group Chuangwei will introduce to you:voice introductionClassification of sounds: Generally speaking, sounds are divided into three categories: Voice, Tone, and Midi.Voice generally refers to voice, speaking sounds, etc., and is generally put into the IC in Wav format. Tone and Midi can be converted into Wav through a computer and then put into the voice IC as voice form, but it will take up a lot of space!Tone is produced by adjusting the output frequency Do Re Me..., we use it less now.Midi uses some timbres to synthesize colorful musical chords. For example, if we want to generate a piano Do Re Me... we will use a standard piano sound Do tone, and then change its playback speed and use a certain method to generate Do Re Me with 8 degrees higher and 8 degrees lower... More Note.Sound output methodThe common voice IC sound output methods we use include DAC output, PWM output, PushPull DAC output. The DAC output is a current output, which means that the data is directly converted into different currents and output from the port. Generally, the sound effect will be better and the volume will be louder, but an external circuit is required to amplify it. PWM output refers to the pulse width modulation output which is of voltage output nature and can be directly connected to the speaker without any peripheral circuit. PushPull DAC output refers to push-pull output and does not require external circuits to be directly connected to speakers.Introduction to Songhan ICThe first 2 or 3 digits of the name are the Songhan logo, that is, SN or SNC, the next 2 digits are the series code, and the last 3 digits represent the voice length. Our commonly used ICs are: 1 channel: SNC27K, 4 channels: SNC36K, SNC32K, SNC81K, SNC16K; 12 channels: SNC86A; 24 channels SNC86C; DSP ICs are all 2 channel WAV, multi-channel MID: such as: SNC7232, SNC7648, etc. The number of I/Os in each of our series is different depending on the size of the mother body.Introduction to Songhan ICSNC7648: 16Bit-ADC, 14Bit-DAC output, recording, playback, voice changing and other functions, DSP IC, the sound is compressed by Audio32, the SPI must be plugged in, the sound is placed in the SPI, the special thing about this is that the program is placed in the SPI , no Mask program is required.4BIT voice IC sound quality ranking: SNC21K> SNC81K> (SNC36K, SNC82B, SNC88B)> SNC27K; Due to the different compression of DSP and 4BIT voice IC, the sound is not directly comparable.If there is no special function, the 1-channel IC will give priority to SNC27K.Group Innovation’s flagship voice chip1. SNC27 OTP series, SNC32 OTP series, SNC36 four-channel, SNC86 series 8-channel, SNC7648, 7232 DSP series.2. Some of Alpha's cost-effective chips (that is to say, if the price of Sonix cannot be accepted by the market, you can consider the corresponding Aohua chip), especially Alpha's AM9AC, AM4EG, AM32A/B series, etc.3. Some of the company's specific platform solutions include: voice recognition, voice control, 2.4G remote control sound toys, local speech recognition, etc. (to be sold as standard PCBA modules in 2019).Shenzhen Zuchuang Microelectronics Co., Ltd. has 19 years of electronic and electrical program development and design and chip agency company, mainly engaged in the design and development of software and hardware for educational electronic products, small household appliances, educational toys, smart home and other consumer electronic products. Can provide MCU, voice IC, Bluetooth IC and module, wifi module. The development capabilities cover PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development and other hardware and software design.
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07-06
2021
Related functions and applications of the dictionary pen
The dictionary pen developed by Group Technology is aimed at the general English learning market and can be used as a translation tool. Its most important thing is the translation function. What are the other functions?Function modules of Dictionary Pen:1. Scanning translation: whole sentence translation, word translation and integration, that is, scanning translation, supports any Chinese and English textbooks, as long as there are words (supports multi-language scanning translation).2. Oral translation: Oral Chinese-English translation (voice translation supports multi-language translation), suitable for Chinese and foreign exchanges.3. Electronic dictionary: Enter the letter to check the word, the same as the electronic dictionary, there is nothing to say.4. Spoken English evaluation: The intelligent oral evaluation of corresponding words and whole sentences according to the prompts is now upgraded to refined oral English, which supports scanning and inputting sentences for evaluation. Scanning any sentence for oral evaluation is more practical than using fixed sentences for refining oral English that appear on the market.5. Scanning excerpts: Scanning and collecting entries can save the sentences by scanning the excerpts, and the sentences can be printed out through a Bluetooth printer. (Different models have different functions).6. International Phonetic Symbols: This module guides the correct pronunciation of phonetic symbols. Click to enter the module, which is divided into original sounds and auxiliary sounds. Switch to slide the screen left and right, and click to enter the specific phonetic symbol learning. On the specific phonetic symbol interface, click on the left mouth icon to pronounce the phonetic symbol, allowing students to learn pronunciation techniques. Right-click on the text to read aloud examples of words that master the essentials of phonetic symbol pronunciation. Click to pronounce, allowing users to master the phonetic symbol pronunciation faster.7. Favorites: Save the entire sentence translation in scan translation.8. Music playback: Can play audio files in MP3 and other formats.9. Digital recording: can record and play recordings. Use the equipped printer to convert recordings into text that is useful in classrooms and meetings. You can print and paste them on your notebook at any time, which can avoid the trouble of recording and writing them on your notebook.10.AI robot: equivalent to an intelligent encyclopedia.
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