4位电子密码锁设计
摘  要
电子密码锁是一种通过密码输入来控制电路或是芯片工作，从而控制机械开关的闭合，完成开锁、闭锁任务的电子产品。它的种类很多，有简易的电路产品，也有基于芯片的性价比较高的产品。应用较广的电子密码锁是以芯片为核心，通过编程来实现的。
本系统由STC89C52单片机系统（主要是STC尾兽89坐看云起时C52单片机最小系统）、4×4矩阵键盘、LCD1602显示和报警系统等组成，具有设置、修改4位电子密码、连续输入三次密码错误报警等功能。
关键词：STC89C52;LCD1602;4母亲节的短信×4矩阵键盘;4位电子密码锁
Abstract
中秋节快乐In daily life and work, for security reasons, the department of housing and security, unit documents, financial statements and some personal information to save more in order to lock the ways to solve. Locking method with the traditional mechanical lock and emerging electronic combination lock. Compared with the traditional mechanical lock, because the el
ectronic combination lock, the secrecy good, the large amount of programming, password variable, can call the police and other characteristics, so the performance and security of the electronic combination lock far from traditional mechanical lock.
  Electronic combination lock is a password or to control circuit, so as to control mechanical switches closed, lock, lock task of electronic products. It's a lot of more phyletic, has simple circuit products, also has a high cost performance products based on the chip. Widely used electronic coded lock based on chip as the core, through the programming.
Key words: STC89C52; LCD1602; Electronic password lock; 4×4 keyboard
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