Design and Implementation of a Microcontroller Based Three Tier Security Lock System

Security has being a major concern for humans since time immemorial. Several approaches towards protecting our homes and offices have being used over time. But there has being consistent failure in the security apparatus employed. This research employs the use of a three tier approach that uses a combination of secret multiuser card, voice recognition and code which will be controlled by an arduino microcontroller. It also uses a master code in case of emergency should the other approaches fail. The system performance was evaluated and the results gotten showed that it has more reliable as compare to other existing system