Access Management Control System Based on MCU
Abstract: This paper puts forward a kind of access control system that can realize the display, identification, storage information and other functions. The system includes the main circuit, LED display circuit, clock circuit, storage circuit, identity recognition circuit and relay control circuit which the main chip chooses 51 series chip of AT89C51 and the identification device selects DS1990A, with the clock chip using DS1302 and the memory chip using AT24C02. The system adapts C51 language to complete the program and simulation debugging is carried out by proteus. According to the simulation, the expected functions had completed. The system is cost-effective, convenient and high reliability and runs stably.
Key words: AT89C51; Access control system; DS1990A; AT24C02
目 录