DESIGN AND CONSTRUCTION OF A MICROCONTROLLER BASED CODE LOCKING SYSTEM WITH ALARM
This work is onMicrocontroller Based Code Locking System with Alarm The need for strict security measures has been necessary since the beginning of time. Access to certain places and items need strict restrictions to only the privileged few. This restricted zone can vary from strong holds and safes in financial institutions to doors leading to restricted areas. The various innovations in security access system include; code based lock, keycard lock, thumb print scan, retina scan. They come in handy in security systems. Code based locking system is best suited in most applications because of its simplicity and reliability. Since the code based locking system is always resident in the area to be protected, there are fewer chances of security breaches unlike the keycard lock system in which the access card can fall into unauthorized hands. Furthermore, in the issue of maintenance, the access code can easily be changed at will with lesser cost unlike in the case of keycard system where a new set of access cards are required. The design and operational principles of a microcontroller based code locking system is the subject of the thesis.The project is made of a keypad unit for entering the access code, a dynamic display unit that displays different messages at specific time, a door controller section made up of a H-bridge driver IC that controls the movement of the motor attached to the door and an alarm system that triggers when the conditions are bridged. The whole system is controlled by an 8051 based microcontroller (89s51)...READ MORE
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