The core part of this design is the STC89C52 single-chip microcomputer, the matrix keyboard, relay, reset circuit and the resonance circuit, digital display, buzzer, etc. To realize the function of electronic combination lock.Keyboard input password compare with E2PRROM password, if the password is consistent, will have to open the lock.If the password is not consistent, and send out alarm signal.Powerful software part use KeilC51 environment, with the ISP download.Using C language programming, the use of flexible.System many functions within the slice, [2] and E2PROM chips was introduced related special function register, apply to some need often change data for application products and distance change equipment parameters of the products [3-6], is in guaranteeing the confidentiality and reliability on the basis of also save the area of the PCB, cost and failure rate is reduced a lot, have a lot of promoting significance.

源程序\dianzimimasuo.lnp
......\dianzimimasuo.M51
......\dianzimimasuo.plg
......\dianzimimasuo.uvopt
......\dianzimimasuo.uvproj
......\dianzimimasuo_uvproj.bak
......\iic.h
......\lcd1602.h
......\main.c
......\main.LST
......\main.OBJ
......\reg.52.h
......\STARTUP.A51
源程序

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