Electronic fingerprint password lock based on 51 microcontroller
Abstract: With the development of society, peoples quality of life is guaranteed, so peoples attention to property security and personal privacy protection has also increased. As an effective security tool, password locks play a role in property security protection. Increasingly important role. In the course of this research, by carefully studying the characteristics of traditional password locks, an electronic fingerprint password lock with a single chip microcomputer as an important carrier was designed. The controller of the combination lock is mainly realized by an STC microcontroller, and the overall design of the combination lock is realized by means of a fingerprint module, a matrix button, a buzzer, an electromagnetic lock and a display module. In the process of setting and entering the system password, it is mainly done through a matrix, and the systems operating status is mainly displayed in real time by means of a display module. The system can verify the correctness of the password input, and then control the on-off of the electronic lock. If the wrong password is entered by the user, a beep sounds from the system. Use c language for system software development and research, and use Keil tools to develop and debug system code.
Keywords: password lock; fingerprint; STC89C52
1 Introduction
Now that science and information technology are becoming more and more mature, socio-economic and peoples living standards have been steadily improving. Among them, a representative manifestation is that the door locks of many families have changed. Transformed into a key to unlock, the door lock switch is turned on by password input. In addition, door cards, voice recognition, and fingerprint unlocking to be studied this time, but these emerging unlocking methods also have certain disadvantages and hidden dangers. This is because voice recognition will be used illegally, passwords may be forgotten, and keys may be lost, so it is said that the use of fingerprint recognition technology in door locks can effectively protect the security of family property to the greatest extent.
In the course of this research, the main functions of the single-chip microcomputer were used to design and study the home security system. It is a specific practice of intelligent home-based home security. At the same time, the practical operation and theoretical knowledge are combined to complete the home application in real life. The research on the technology of door locks provides specific guidance for the research of intelligent fingerprint locks based on single-chip microcomputers from the perspective of professional theoretical knowledge. This research not only has theoretical value but also important practical significance. It effectively helps people to improve the convenience and quality of life through fingerprint recognition technology. In addition, it has a significant pulling effect on the development of the fingerprint industry and the progress of science and technology. The design has the characteristics of environmental protection and low energy consumption, which makes it very easy to implement software and system development.
2 Component selection and overall design
2.1 Component selection
This design uses STC89C52 in chip selection. This chip is introduced by a famous technology company. It guarantees high performance and reduces power consumption to a low level. It is also equipped with a memory that can perform related programming operations. The core part of the chip has more powerful functions, which can be well compatible with instructions, but after the upgrade, it will add many functions that traditional microcontrollers do not have, among which the typical meaning includes that the chip comes with 4K memory When the corresponding data needs to be stored, the chips internal storage can be used directly without external storage. This kind of single-chip microcomputer has many advantages and characteristics, among which the representative ones include good economy, support for online programming, and low development difficulty. From an objective point of view, it is a very good choice.
The display part is LCD12864. This display is equipped with a corresponding Chinese character library and a flexible interface. It also has thousands of Chinese characters and hundreds of related character sets built in, and its resolution is high, which can reach 128 times; 64. Because this module has the advantages of convenience, low operation instruction difficulty, and flexible interface, it can achieve a good Chinese-language interactive interface to a great extent. In addition, it also supports the display of two kinds of dot matrix Chinese characters, and supports graphic display at the same time. The device has outstanding display functions and low power consumption and low voltage properties. However, due to excessive real content, resources are wasted and costs On the high side.
Choose a case plan. The single chip microcomputer is used to deal with the digital password specifically. The single chip microcomputer designed by the digital integrated circuit has the characteristics of high control precision. In addition, it can realize various effective functional operations in the process of connecting with the peripheral circuit. The signal input design is implemented based on a matrix keyboard. The keyboard processes various combinations of numbers to determine whether the password is correct.
The display part is LCD12864. This display is equipped with a corresponding Chinese character library and a flexible interface. It also has thousands of Chinese characters and hundreds of related character sets built in, and its resolution is high, which can reach 128 times; 64. Because this module has the advantages of convenience, low operation instruction difficulty,
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Electronic fingerprint password lock based on 51 microcontroller
Abstract: With the development of society, peoples quality of life is guaranteed, so peoples attention to property security and personal privacy protection has also increased. As an effective security tool, password locks play a role in property security protection. Increasingly important role. In the course of this research, by carefully studying the characteristics of traditional password locks, an electronic fingerprint password lock with a single chip microcomputer as an important carrier was designed. The controller of the combination lock is mainly realized by an STC microcontroller, and the overall design of the combination lock is realized by means of a fingerprint module, a matrix button, a buzzer, an electromagnetic lock and a display module. In the process of setting and entering the system password, it is mainly done through a matrix, and the systems operating status is mainly displayed in real time by means of a display module. The system can verify the correctness of the password input, and then control the on-off of the electronic lock. If the wrong password is entered by the user, a beep sounds from the system. Use c language for system software development and research, and use Keil tools to develop and debug system code.
Keywords: password lock; fingerprint; STC89C52
1 Introduction
Now that science and information technology are becoming more and more mature, socio-economic and peoples living standards have been steadily improving. Among them, a representative manifestation is that the door locks of many families have changed. Transformed into a key to unlock, the door lock switch is turned on by password input. In addition, door cards, voice recognition, and fingerprint unlocking to be studied this time, but these emerging unlocking methods also have certain disadvantages and hidden dangers. This is because voice recognition will be used illegally, passwords may be forgotten, and keys may be lost, so it is said that the use of fingerprint recognition technology in door locks can effectively protect the security of family property to the greatest extent.
In the course of this research, the main functions of the single-chip microcomputer were used to design and study the home security system. It is a specific practice of intelligent home-based home security. At the same time, the practical operation and theoretical knowledge are combined to complete the home application in real life. The research on the technology of door locks provides specific guidance for the research of intelligent fingerprint locks based on single-chip microcomputers from the perspective of professional theoretical knowledge. This research not only has theoretical value but also important practical significance. It effectively helps people to improve the convenience and quality of life through fingerprint recognition technology. In addition, it has a significant pulling effect on the development of the fingerprint industry and the progress of science and technology. The design has the characteristics of environmental protection and low energy consumption, which makes it very easy to implement software and system development.
2 Component selection and overall design
2.1 Component selection
This design uses STC89C52 in chip selection. This chip is introduced by a famous technology company. It guarantees high performance and reduces power consumption to a low level. It is also equipped with a memory that can perform related programming operations. The core part of the chip has more powerful functions, which can be well compatible with instructions, but after the upgrade, it will add many functions that traditional microcontrollers do not have, among which the typical meaning includes that the chip comes with 4K memory When the corresponding data needs to be stored, the chips internal storage can be used directly without external storage. This kind of single-chip microcomputer has many advantages and characteristics, among which the representative ones include good economy, support for online programming, and low development difficulty. From an objective point of view, it is a very good choice.
The display part is LCD12864. This display is equipped with a corresponding Chinese character library and a flexible interface. It also has thousands of Chinese characters and hundreds of related character sets built in, and its resolution is high, which can reach 128 times; 64. Because this module has the advantages of convenience, low operation instruction difficulty, and flexible interface, it can achieve a good Chinese-language interactive interface to a great extent. In addition, it also supports the display of two kinds of dot matrix Chinese characters, and supports graphic display at the same time. The device has outstanding display functions and low power consumption and low voltage properties. However, due to excessive real content, resources are wasted and costs On the high side.
Choose a case plan. The single chip microcomputer is used to deal with the digital password specifically. The single chip microcomputer designed by the digital integrated circuit has the characteristics of high control precision. In addition, it can realize various effective functional operations in the process of connecting with the peripheral circuit. The signal input design is implemented based on a matrix keyboard. The keyboard processes various combinations of numbers to determine whether the password is correct.
The display part is LCD12864. This display is equipped with a corresponding Chinese character library and a flexible interface. It also has thousands of Chinese characters and hundreds of related character sets built in, and its resolution is high, which can reach 128 times; 64. Because this module has the advantages of convenience, low operation instruction difficulty,
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