Dhaka University Journal of Applied Science & Engineering

• Monisha Mushtary Uttsha
  Department of Robotics and Mechatronics Engineering, University of Dhaka, Dhaka-1000, Bangladesh
• A.K.M. Nadimul Haque
  Department of Robotics and Mechatronics Engineering, University of Dhaka, Dhaka-1000, Bangladesh
• Shamim Ahmed Deowan
  Department of Robotics and Mechatronics Engineering, University of Dhaka, Dhaka-1000, Bangladesh
• Sejuti Rahman
  Department of Robotics and Mechatronics Engineering, University of Dhaka, Dhaka-1000, Bangladesh

With the advancement of science and technology life has become simple and easy, but at the same time, lack of security has become a major problem in the day to day life. This paper focuses on the possible security threats on a lock and weighs them against the increasing cost and the possible solutions for overcoming them and proposes a smart security lock for simple home security application. In the proposed system, the owner gets the option to create and choose his own password, or reset the password. If the wrong password is given 25 times, an alarm will ring. If someone tries to break the lock forcefully, the excess pressure will be sensed and an alarm will ring. The low-cost but effective piezoelectric sensor, along with other low-cost devices make the proposed system cost effective and affordable, compared to other state-of-the-art systems.

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