单片机的控制及与其外围电路的组合来实现其基本功能的电子密码锁。运用单片机多端口的强大控制能力来协调电路中的显示、键盘输入、报警电路等一系列各个部分的配合，从而实现一个密码锁应该具备的基本功能。其中，单片机使用了STC系列的STC89C52R型号；显示电路则使用液晶屏LCD1602来达到显示的效果；键盘输入运用了矩阵式的键盘输入方法；报警电路使用了LED灯、音乐芯片及蜂鸣器来实现它的提示作用。-Combination of control and its peripheral circuits microcontroller to achieve its basic functions of electronic locks. Strong ability to control the use of single-chip multi-port to a series of coordination in various parts of the circuit display, keyboard input, alarm circuits, etc., in order to achieve a lock should have basic functions. Among them, the use of STC microcontroller series STC89C52R models　show circuit is used to achieve the desired effect LCD1602 LCD display　keyboard input using a matrix keyboard input method　alarm circuit using LED lights, music and buzzer chip to achieve It' s suggestive.