Embedded System Based Interlocking System of Electromagnetic Door using Raspberry Pi Pico Microcontroller
Abstract
The Basic requirement of security can be achieved by designing electrical or mechanical locks that are designed with one or a few keys, but for locking a big area many locks are required. Basically traditional locks are heavy and are not protective as they can be broken down easily by using some tools. Electronic locking systems are preferable over mechanical locks, to resolve the security problems that are associated with the mechanical locks. A magnetic lock is a simple locking device that consists of an electromagnet and armature plate. By attaching the electromagnet to the door frame and the armature plate to the door, a current passing through the electromagnet attracts the armature plate holding the door shut. The magnetic lock relies upon some of the basic concepts of electromagnetism. Essentially it consists of an electromagnet attracting a conductor with a force sufficiently large enough to prevent the door from being opened. Nowadays every device’s operation is based on digital technology. In this project, a keypad is attached to the door for opening and closing operations of the door. After entering the code, if that code matches with the predefined one, then the door will unlock for a limited period of time. After prolonging the unlocking for a fixed period of time, the relay reenergizes and the door gets locked again. If anyone enters a wrong code in an attempt to open the door, then this system immediately switches an alarm or a buzzer.
