Designed to simulate electromagnetic relay locks, by the microcontroller 8051 to control the lock open and closed, by the HD7279 to manage the keyboard and display device, the password from the keyboard input to control the 7279 with 8051 shows the current lock status information and alarms. The microcontroller development system designed for use to simulate the lock of a variety of functions, the password from 4-6 digits, when the lock when the password match, enter the three inconsistent with the police, at the same time when you enter the correct password can modify the password, this time indicator light . SCM developed unlocking switch volume control through the optocoupler, open the lock. Alarm alarm signal sent by the MCU to control the audio amplifier circuit alarm sounds.

Microcontroller Based Electronic Code Lock Design.doc

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