Problem Statement

the problem

Have you ever gotten locked out of your room? Would you like a way to ensure security and ease of access to your room?

Getting locked out is a problem for many college students, whether their door automatically locks when closed, they left without their key and their roommate locked the door, or you lose your key. There are many problems that can occur from having a key lock so we want to find a better solution to this in a college dorm. There are many smart locks out on the market that solve this problem however they require replacing existing hardware which is not an option in a dorm so we need to design a solution that will be retrofitted onto an existing lock.

A new policy for George Mason University Students who are getting locked out of their dorms

requirements

Successfully be able to clasp a variety of locks
Be able to house the keypad and OLED display
Be able to move a servo 90 degrees exactly to prevent damaging the lock
Able to enter a combination into the keypad and see if it is correct

We decided to create a physical prototype that would use the Arduino to move the servo motor to unlock and lock the door, and connect the keypad to the OLED screen to display messages and the password.

Physical Prototype

We 3D printed all of the aspects of the Lock and Roll and used a 20kg servo and keypad that we purchased separately.

Electronics/ ProgramMing

We used the electronics to not only power the keypad that was on the outside of the door (on the front housing unit) that displayed messages of "unlocked" and "locked" when typing in the password, but also to power the servo on the inside of the door that would physically lock and unlock the door.

Master Assembly v6.mp4

ADvanced CAD/ Manufacturing

We decided to use both 3D animations and manufacturing as we created the physical prototype and also use a simulation to show how the door would lock and unlock with the servo and lock clasp.