Abstract
The security is key concern in our daily life. A key protected access control module is an elementary part of all security systems. It allows only the authorized people to enter into a restricted zone. This work focuses on the design and development of a digital code lock system with display for students demonstration purpose. Being designed for illustration purpose, the system has easily accessible inputs and outputs to each module. In order to keep the system cost effective with an ease of reimplementation. The low cost and easily market available discrete analog components are employed. The digital part is kept configurable with the help of a microcontroller based implementation. It allows an easy alteration of the master code in order to improvethe system security. The digital module implementation is done via C language. The system implementation is described. Testing results are also presented. These results assure a proper functionality of the designed system.
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