Wiki Archive • MKTechnic

What is a chipless RFID tag?

The chipless Radio Frequency Identification (RFID) tag is a technology that uses electromagnetic fields to automatically identify objects and obtain relevant data wirelessly. Different from traditional RFID, it does not require a chip as a medium, but directly encodes information on labels or tags. Chip free RFID tags have the characteristics of low cost, simple structure and easy production, so they are often used in packaging, transportation, inventory management and other fields. At the same time, chip free RFID is also widely used in agriculture, food safety and other industries to achieve product traceability and management.

Specifically, the working principle of the chipless RFID tag may depend on the spectrum characteristics to encode data. For example, a chip free RFID system based on multi resonator and cross polarized ultra wideband (UWB) monopole antenna, the unique ID of its tag is encoded into the spectrum characteristics of the resonator. After receiving the interrogation signal, this system will encode the data into the amplitude and phase of the spectrum, and then retransmit it back to the reader. This chip free RFID system is mainly suitable for marking extremely low-cost items in a short distance (up to 40 cm).

In addition, the chipless RFID tag also uses a technology called surface acoustic wave (SAW). Through several generations of technology upgrades, its price has been greatly reduced, and it can store enough data to use traditional chip RFID operations on the universal frequency band. At the same time, because the chip free RFID technology uses non-toxic materials, it has the potential of low production cost compared with silicon chips.

The application of chipless RFID tags is very extensive, and the following are some main application scenarios:
1.Unmanned Convenience Store:
In unmanned convenience stores, chipless RFID technology is widely used for checkout and payment of goods. Each item is labeled with an RFID tag. When a customer selects a product and leaves the store, the system will automatically recognize and calculate the price, achieving self-service checkout.
2.Logistics and Supply Chain Management:
In logistics and supply chain management, chipless RFID technology can achieve tracking and management of goods, improve logistics efficiency and accuracy. By using this technology, enterprises can effectively reduce out of stock losses, improve inventory turnover, and optimize the entire supply chain process.
3.Retail and Inventory Management:
In the retail industry, whether it is supermarkets or footwear retail enterprises, chipless RFID technology can help enterprises achieve more efficient inventory management. By attaching RFID tags to products, companies can track their location and quantity in real-time, thereby improving the accuracy and efficiency of inventory management.
4.Agriculture and Livestock:
In the field of agriculture, chipless RFID technology can be used for identifying and managing crops and livestock, helping farmers improve production efficiency. For example, it can be used to track the health and growth status of livestock, or to identify and manage crops.
5.Anti counterfeiting and identity verification:
Chiseless RFID tags can also be used for item anti-counterfeiting and identity verification. Due to its uniqueness and difficulty in replication, RFID tags can be used to identify and verify the authenticity of products, preventing the circulation of counterfeit and inferior products. Meanwhile, it can also be used for identity verification, such as access control systems or employee attendance.

In conclusion, chipless RFID tag is a technology with broad application prospects. Its low-cost, easy production and easy integration features make it have potential application value in many fields. But it should be noted that although chipless RFID technology has many advantages, there are also some challenges and limitations. For example, compared to RFID technology with chips, chipless RFID has limited reading distance and may not be suitable for recognition over longer distances. In addition, the encoding and decoding process of chipless RFID tags is relatively complex and requires specific reading and writing devices to implement.

With the advancement of technology and the deepening of applications, the application scenarios of chipless RFID tags will continue to expand and optimize.

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The steps of making OEM cable wires

OEM Cable Wires refers to a customized processing service that combines various cables, plugs, connectors, etc. into electronic or electrical products that meet practical needs.

The following is the general process for customizing cable wire harnesses:
1.Understand customer needs:
Gain a deep understanding of the wiring harness required by the customer, including its functions, usage scenarios, application environment, required quantity and quality, etc.
Customers will decide what kinds of connectors, wires material, wires size, and connection methods according to their application situation.
2.Design plan:
Based on the customer’s required wiring harness, design a suitable wiring harness plan, and select appropriate wires, accessories, and processes according to the actual situation.
It is particularly important to note that the design must strictly follow the wire connection sequence required by the customers, otherwise this custom cable wires will become scrap as the customers will not be able to use it.
3.Material preparation:
Select the necessary auxiliary materials and tools such as wires, plugs, connectors, labels, packaging, etc.
4.Manufacturing process:
According to the design scheme, assemble the wiring harness, conduct electrical performance testing, on/off testing, appearance inspection, etc., to ensure the quality of the wiring harness.
5.Cleaning and packaging:
Clean the surface of the finished wire harness, and label, package, and package the wire harness according to customer requirements.

OEM Cable Wires processing can meet the personalized needs of various industries and is widely used in fields such as automotive electronics, communication equipment, industrial automation robots, etc. It should be noted that customized processing of wire harnesses must pay attention to quality control to ensure the stability and safety of the wire harness.

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What is LCD twisted nematic field effect?

LCD Twisted nematic field effect, also known as twisted nematic effect, mainly refers to the phenomenon that the long axis of nematic liquid crystal molecule is twisted 90 ° continuously between the upper and lower glass substrates. For a liquid crystal cell containing nematic liquid crystals with positive dielectric anisotropy and a cell thickness of about 10μm, its manufacturing principle is to make the long axis of liquid crystal molecules twist 90° continuously between the upper and lower glass substrates. Since the twist pitch is far greater than the wavelength of visible light, when linearly polarized light perpendicularly incident on the glass substrate passes through the liquid crystal cell, its polarization direction will rotate 90 ° along the twist direction of the liquid crystal molecule.

When such a liquid crystal cell is placed between two parallel polarizers, light can pass through. This is the working principle of twisted nematic liquid crystal display element, which can display white background patterns or black background white patterns. If the molecular long axis of nematic liquid crystal is continuously twisted 180 °~270 ° between the upper and lower glass substrates, it is called “super twisted nematic effect”.

In practical applications, twisted nematic field effect is widely used in liquid crystal displays. Twisted nematic liquid crystal display (TN-LCD) realizes image display by controlling the twist degree of liquid crystal molecules. When the electric field is applied to the liquid crystal molecules, the liquid crystal molecules will rearrange, reducing the twist angle, so that the light through the liquid crystal layer can be transmitted. In this way, TN-LCD has only two states: active and inactive, thus realizing image display.

Twisted nematic liquid crystal display (TN LCD) has the advantages of high brightness, high contrast, vivid color and fast response speed, but it also has some disadvantages, such as small viewing angle and limited viewing angle.

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7 Segment LCD 3 Digit TN Display Screen, twisted nematic lcd

What is TN LCD?

TN LCD is a display mode of LCD, where TN refers to “Twisted Nematic“, meaning twisted nematic. In TN liquid crystal screen, the arrangement of liquid crystal molecules distorts the light when passing through the liquid crystal layer, thus realizing the display function. Specifically, when the electric field acts on the liquid crystal molecules, they will rotate or twist according to a certain angle, thus changing the propagation direction of light, so that pixels display different brightness or color.

TN lcd has a series of remarkable features, which enable it to play an outstanding role in different application scenarios. The following are the main features of TN lcd:
1.Fast response speed:
TN lcd has relatively fast response time, which means that the screen refreshes quickly when displaying images or text, can quickly respond to input signals, reduce delay and smear, and thus provide a smoother visual experience.
2.Limited viewing angle range:
Although TN lcd performs well in front viewing, its viewing angle range is relatively narrow. When viewed from the side or at an oblique angle, the color and contrast may be significantly affected, resulting in distortion or darkening of the image. This limits its use in application scenarios that require a wide range of perspectives.
3.The price is relatively low:
TN lcd has relatively simple production process and low cost, so it is more competitive than some other types of LCD in price. This makes it a widely used choice in consumer electronic products, especially those products that are price sensitive.
4.Low power consumption:
TN lcd performs well in power consumption. Compared with other types of displays, its power consumption is low. This makes it more advantageous in devices that need to run for a long time or rely on battery power, and can extend the life of the device.
5.Contrast and brightness:
Although TN lcd may be inferior to high-end LCD in some aspects, it can usually provide sufficient contrast and brightness to meet the needs of general applications. This enables it to present a clear and bright image in the scene of daily use.

TN LCD has been widely used in consumer electronic products, such as calculators, electronic watches, air conditioning remote controls, temperature panels, electricity meters, and various mechanical and agricultural equipment. Its compact, lightweight and price advantages make it an ideal choice for these products.

It should be noted that with the continuous development of LCD technology, there are many other types of LCD screens, such as IPS, VA, etc., which have better performance in perspective, color performance and contrast. Therefore, when selecting the LCD screen, it is necessary to make decisions according to the specific application needs and budget.

TN LCD Display 4 Digit 7 Segment Screen for Timer Reminder

PLC vs MCU-the differences between PLC and MCU

About the PLC vs MCU, PLC (Programmable Logic Controller) and MCU (Microcontroller Unit) are significantly different in many aspects.

First of all, from the definition and purpose, PLC is a digital operation electronic system designed for industrial environment. It uses programmable memory to perform logic operations, sequence control, timing, counting and arithmetic operations, and controls various machinery or production processes through digital or analog input and output. MCU, also known as single chip microcomputer, is to reduce the frequency and specification of CPU appropriately, and integrate peripheral interfaces such as memory, counter, USB, A/D conversion, UART, PLC, DMA, and even LCD drive circuits on a single chip to form a chip level computer for combined control in different applications.

Secondly, from the development process, PLC usually does not need to know the underlying resources. The manufacturer will provide a secondary development, user-friendly programming software. Users can use ladder diagram and other languages to program, making the development process relatively simple and fast. While MCU requires developers to have certain underlying knowledge and programming skills, such as assembly or C language, to develop the underlying.

Thirdly, from the perspective of price and application scope, PLC is relatively expensive, but its development cycle is short, effective, reliable, and interchangeability is good, especially suitable for industrial control and other occasions that need high reliability and stability. Because of its low cost and flexibility, MCU is widely used in various electronic products, such as mobile phones, PC peripherals, automotive electronics, etc.

Finally, from the perspective of function and performance, PLC has strong logic control ability and data processing ability, which is suitable for complex industrial automation control. Although MCU has powerful functions, it may be restricted by its hardware performance, such as the scan cycle and clock frequency may be unstable, so it may be inferior to PLC in some high real-time applications.

In general, about PLC vs MCU, PLC and MCU have their own characteristics and advantages, so which equipment to use should be selected according to specific application scenarios and needs. For industrial control occasions requiring high reliability and stability, PLC may be more suitable; For electronic product applications that require low cost and flexibility, MCU may have more advantages.

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What is 16×2 character LCD display?

16×2 character LCD display(1602 LCD character display), also known as 1602 character LCD, is a dot matrix LCD module specially used to display letters, numbers, symbols, etc. The following is a detailed introduction to it:

Basic composition and display principle:
1.16×2 character LCD display consists of several 5×7 or 5×11 dot matrix character bits, and each dot matrix character bit can display one character. The dot spacing between dot matrix character bits and the spacing between lines ensure a clear separation between characters and lines.
2.The display principle is mainly based on the electric field orientation change of liquid crystal molecules. When an electric field is applied, the arrangement of liquid crystal molecules will change, thus affecting the transmission or reflection of light, forming visible images or characters.

Display contents and characteristics:
1.16×2 character LCD display can display two lines at the same time, each line has 16 characters, and a total of 32 characters can be displayed.
2.It supports the display of English letters (upper and lower case), numbers, punctuation marks and other characters.
3.The character generation memory (CGROM) inside the LCD module has stored 160 different dot matrix character graphics, including Arabic numerals, upper and lower case of English letters, common symbols, Japanese kana, etc. and its CGRAM can be treated as lcd custom character generator to create your own lcd display characters.

Pin definition and function:
1.16×2 character LCD display usually adopts standard 16 pin interface or pin. These pins include power ground (GND), power positive pole (VCC), contrast adjustment terminal (V0), register selection (RS), read/write signal line (RW), enable terminal (E or EN), 8-bit bidirectional data terminal (D0-D7), backlight positive pole and backlight negative pole, etc.
2.The contrast adjustment terminal is used to adjust the contrast of the LCD. The contrast can be adjusted by connecting the positive power supply or the ground power supply.
3.Register selection is used to select data register or instruction register for data writing or instruction execution.
4.The read-write signal line is used to control the read-write operation of data. The read-write operation is performed at high power level and the write operation is performed at low power level.
5.The enabling terminal is used to control the timing of reading information and executing instructions.

Performance advantages:
1.Good display effect:
with high brightness, high contrast and high definition, characters can be clearly displayed under different light conditions.
2.Low power consumption:
LCD technology is used, which has low power consumption and is suitable for applications requiring high power supply.
3.Fast display speed:
with fast response speed, it can display the input characters in real time.

Application field:
1.Because of its simple, intuitive and easy to control characteristics, 1602 LCD character display is widely used in industrial control, instrumentation, consumer electronics and other fields. It is often used to display equipment status, parameters, prompt information, etc.

In a word, 1602 LCD character display has become an indispensable display component in electronic equipment and systems due to its excellent performance and wide range of applications.

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LCD 1602 Module 5V 16x2 Blue English Russian LCM Display

What is PLC in manufacturing?

In the manufacturing industry, PLC (Programmable Logic Controller) is a key automatic control equipment. It is widely used in various production line automatic control systems with its high efficiency, stability and flexibility.

First of all, PLC has strong programming ability, and users can freely write control programs according to the actual needs of the production line. This enables PLC to adapt to various technological processes and production needs, providing great flexibility for the manufacturing industry. At the same time, the modular design of PLC also makes it very extensible. It can be expanded and transformed with the change of production line, and new modules or subprograms can be added to meet the changing production needs.

Secondly, the reliability of PLC is very high. It adopts real-time operating system and reliable hardware design, which can ensure long-term stable operation and low failure rate. This enables PLC to operate stably and reliably in a complex industrial environment, and provides continuous and stable automatic control services for the manufacturing industry.

In addition, PLC also has powerful data processing and control capabilities. It uses high-speed CPU and optimized program design to achieve efficient control and data processing, and has a very fast response speed. This enables PLC to monitor the status of the production line in real time, and adjust the control strategy as needed to ensure the smooth progress of the production process.

In the manufacturing industry, PLC is widely used in automatic control of various production lines, including automatic assembly line, automatic packaging line, automatic spraying line, automatic welding line, etc. It can help the manufacturing industry to achieve accurate and efficient production, improve product quality, reduce production costs, and enhance the competitiveness of enterprises.

However, PLC programming requires certain professional skills and experience, which may be difficult for beginners and non professionals. Therefore, when using PLC, professional technicians are required to operate and maintain it to ensure its normal operation and maximize its efficiency.

In general, PLC plays an important role in the manufacturing industry. With its high efficiency, stability and flexibility, it provides strong support for the automated production of the manufacturing industry. With the continuous progress of technology, the performance and function of PLC are also improving, which will bring more possibilities for the future development of the manufacturing industry.

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What is EC5 battery connector?

EC5 battery connector is a high-current battery connector. It is designed with multiple features, such as gold-plated copper terminals, flame retardant PA6 insulator material, black color, and complies with UL 94V-0 standards. In addition, EC5 battery connector is resistant to high temperatures and is an upgraded version of T-shaped plug, which is particularly suitable for various models with high current, such as model airplane, model car, model boat, robot, drone, etc. At the same time, it is also widely used in electric models, battery electrical and electronic, healthcare and other industries.

The EC5 connector is a larger version of the EC3, with 5mm pins and increased contact surfaces, resulting in an increased rated current capacity of up to 120 amps. This design makes the it an excellent choice for battery use and power requirements in selected designs.

In addition to the previously mentioned advantages, the EC5 battery connector also has the following significant features:
1.Compact structure and simple installation:
EC5 connector adopts compact design, which makes it easier to install. This design not only saves space, but also improves work efficiency, making it easy to integrate EC5 connectors in various devices and systems.
2.High durability:
Because the EC5 connector adopts high-quality materials and manufacturing processes, it has excellent durability. It can maintain stable performance, reduce failure rate and improve the overall reliability of the equipment during long-term use.
3.Extensive compatibility:
EC5 connector is widely used in various battery systems and equipment, and its design enables it to be compatible with various types of batteries and electronic equipment. This makes it a very flexible connection scheme that can meet the needs of different users.
4.High cost-effectiveness:
Although the EC5 connector is excellent in performance and design, its price is relatively reasonable and has a high cost performance ratio. This makes it widely competitive in the market and favored by many users.

Overall, the EC5 battery connector is a powerful, safe, and reliable battery connector that is widely used in various models and industries. However, please note that it should be selected according to specific needs and specifications when used, and follow relevant safety procedures.

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What is LCD driver board?

LCD driver board is an important part of LCD, which is mainly responsible for driving and controlling the normal operation of LCD panel. The following is a detailed introduction to the LCD driver board:

Main functions:
1.Provide video signal:
the drive board receives external signal sources (such as computer, TV signal, etc.) and converts them into signal formats that can be understood by the LCD panel. In this way, the LCD panel can display the corresponding image or video content.
2.Control parameters:
The drive board can control various parameters of the LCD, such as brightness, contrast, color, etc. The setting of these parameters directly affects the quality and appearance of the display effect.
3.Backlight control:
For LCD displays that need backlight sources, the driver board is also responsible for controlling the brightness, switch, etc. of the backlight module to ensure the normal lighting and display of the LCD panel.

Operating principle:
The drive board contains a series of complex circuits and logic control units. When the external signal is input, the drive board will first decode and process the signal, and convert the signal into a format that can be recognized by the LCD panel. Then, the driving circuit transmits the signal to each pixel of the LCD panel to control the brightness and color of the pixel, so as to present a complete image.

Components include:
The drive board is usually composed of multiple functional modules, such as signal receiving module, decoding module, control module, power module, etc. These modules work together to ensure that the drive board can receive and process signals normally and transmit control signals to the LCD panel accurately.

Application scenario:
LCD driver board is widely used in various electronic devices, such as computer monitors, televisions, tablet computers, etc. With the progress of technology and the expansion of the market, the demand for the drive board is also increasing, and the requirements for its performance and quality are also increasing.

It should be noted that the design and performance of LCD driver boards of different brands and models may be different, so they need to be matched and debugged according to the actual needs when selecting and using them.

In a word, the LCD driver board is one of the core components of the LCD. It is responsible for receiving and processing signals, controlling the display effect of the LCD panel, and providing users with high-quality visual experience. For more in-depth understanding, it is recommended to consult relevant technical manuals or consult professional technicians.

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M.RT2556.51 LCD Screen Monitor Driver Controller Board

What is RFID card?

The full name of RFID card is Radio Frequency Identification Card, which is also called electronic tag or inductive electronic chip. It is a non-contact data access technology through radio waves. It can connect the database system behind it through wireless communication and data access technology to form a large and connected system.

The basic principle of the RFID card is that when the card enters the magnetic field area, it receives the signal sent by the reader, sends the information stored in the chip with the energy obtained by the induced current, or actively sends the signal of a certain frequency. After the reader reads the information and decodes it, it sends it to the central information system for relevant processing.

RFID card has many advantages. First, it can be read non-contact, which means that users do not need to physically contact the card with the reader, greatly improving the convenience of operation. Secondly, the RFID card can read multiple tags at the same time, which greatly improves the work efficiency. In addition, RFID cards also have penetrability. They can communicate through non-metallic or opaque materials such as paper, wood and plastic when covered, making their application scenarios more extensive. Moreover, the RFID card has a large amount of data storage and can store more information. Finally, RFID cards have various forms, which can be made into cards, buttons, labels, etc., and can meet different use needs.

RFID cards are widely used, including but not limited to asset management, access control, parking lot control, production line automation, material management, retail management, medical management and other fields. For example, in the field of asset management, RFID cards can be used for warehouse management, fixed asset management and file management to achieve efficient tracking and management of assets. In the medical field, RFID cards can be used for patient identification, medical equipment tracking, medical waste management, etc., to improve the quality and efficiency of medical services.

In the future, with the continuous development of RFID technology, RFID cards will be further miniaturized and integrated to integrate more functions. At the same time, RFID card will pursue higher reading distance, higher reading and writing speed and lower power consumption to better meet various application requirements. In addition, multi band and multi protocol support will also become the development trend of RFID cards, making RFID systems in different countries and regions compatible and interoperable.

However, although RFID card has many advantages and broad application prospects, we also need to pay attention to its possible privacy and security issues. Therefore, when using RFID cards, appropriate security measures need to be taken to protect users’ privacy and data security.

In general, RFID card, as an advanced wireless communication technology, has brought great convenience and benefits to our life and work. With the continuous progress of technology and the expansion of application fields, RFID cards will play a more important role in the future.

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