1. Significance trend: In daily life and work, the security of houses and departments, the preservation of documents and archives of units, financial statements and some personal data are mostly solved by locking. If traditional mechanical keys are used to unlock the lock, people often need to carry multiple keys, which is extremely inconvenient to use and greatly reduces the safety after the keys are lost. With the continuous development of science and technology, people have higher and higher requirements for security in daily life. In order to meet people's requirements for the use of locks and increase their security, coded locks with passwords instead of keys came into being. Password lock has the advantages of high security, low cost, low power consumption and easy operation.
In the field of security technology, the electronic password lock with anti-theft alarm function gradually replaces the traditional mechanical password lock, which overcomes the shortcomings of mechanical password lock such as less passwords and poor security performance, and greatly improves the technology and performance of password lock. With the development of large-scale integrated circuit technology, especially the appearance of single chip microcomputer, intelligent password lock with microprocessor has appeared, which not only has the function of electronic password lock, but also has the function of intelligent management and expert analysis system, making password lock highly safe and reliable and has been widely used.
With people's attention to security and the development of science and technology, many electronic smart locks (fingerprint identification and ic card identification) have been published at home and abroad. But these products are characterized by specific fingerprints and valid cards, which can only be applied to boxes, cabinets and doors that need to be kept secret. Moreover, if the fingerprint reader is used in public places, it is easy to be damaged mechanically, and the ic card is also easy to be lost and damaged. In addition, its high cost also limits the popularization and promotion of such products to some extent. In view of the current technical level and market acceptance, electronic password lock is the mainstream of this kind of electronic anti-theft products.
2. Main contents:
According to the set password, the password input function is realized by using the 4×4 keyboard. When the password is entered correctly, the lock will be opened. If the password is entered incorrectly, the key will be locked for 3 seconds and an alarm will sound.
(1) The model of single chip microcomputer can be selected as AT89C5 1.
(2) The setting of 6-digit password is completed in the program.
(3) Enter the password through the 4×4 keyboard. After entering 6 digits, press Enter to finish.
(4) If the password entered is correct, the lock will be opened and the LED will light up 1 sec as a prompt.
(5) Buzzer or speaker can be used for alarm.
Maybe the problem needs to be understood by yourself.
3. Single chip microcomputer, C language programming. Very mature technology, nothing to analyze.
Landlord, if the reward is higher next time, everyone will do it for you.