本数字密码锁采用单片机AT89S52为主控芯片，由EEPROM存储密码。硬件部分包括主控制系统、人机交互界面以及输出系统三大部分。

软件部分应用单片机C语言实现了本设计的全部控制功能。C语言编译方便，易读性好，且移植性方便，能够满足实现本系统的功能要求。在设计过程中，给出了本系统C语言编程的原理和流程图。-The digital code lock using AT89S52 microcontroller as the main chip, the EEPROM stores the password. Hardware, including the main control system, interactive interface and output system of three parts. Application of SCM software part of the C language to implement all control functions of the design. C compiler easy accessibility and good, and easy portability to meet the functional requirements to achieve this system. In the design process, given the system' s principles and C language programming flow chart.