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.

key.asm

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