# Title Team Members TA Documents Sponsor
45 Universal Key and Proximity Lock System
Brant Bedore
Jason Hackiewicz
Talita Maria Briganti Barbosa
Madison Hedlund design_document1.pdf
Jason Hackiewicz (jph2), Talita Barbosa (talitab2), Brant Bedore (bbedor2)

# Problem:
Opening locked doors with the traditional key and lock system can be a hassle. Managing several keys which all belong to various locking systems is difficult to operate when carrying groceries and traditional RFID locks require the user to touch a card to the locking device. Moreover, people with impairments to arm or hand movements such as Parkinson's disease have a particularly difficult time with this task.

# Solution Overview:
Our solution to this problem is a touchless proximity lock. While previous projects have touched on using the idea of proximity locks, this solution differentiates itself by being touchless and using bluetooth communication instead of a traditional RFID system. The system will include a key and locking device which are “paired” via bluetooth. This functionality would allow the user to pair the key with multiple locking systems to act as a universal key. When the key is brought within a proximity of about ten feet or so of the locking system the door will automatically unlock. This functionality would solve the original problem of managing keys as well as being a solution for individuals with a physical impairment.

# Solution Components

## Locking Device

- External user interface: This would be represented by a small display shown on the outside of the locking system. The display would show information that anyone outside of the door can see. For example, this display might show information such as the remaining battery for the locking device.

- Internal user interface: The internal user interface displays some of the data that the external user interface displays like the battery life but also displays additional information that only people inside can see. For example, this might display whether the locking system is currently in the locked or unlocked state. This side of the user interface would also have a button that pairs with the universal key when the button on the universal key is pressed at the same time.

- Power System: To power the device a small battery system will be used as the device should run with a low power consumption.

- Bluetooth Communication: This internal part of the locking system will process and correctly interpret a signal from the universal key. When a signal is received from a paired device within the appropriate distance, the door will unlock.

- Alternative mechanical locking system: This subsystem is a backup in case that the battery dies or something else with the system is not working properly. This will operate like a traditional lock and key and allow the user to mechanically unlock the door with a backup key.

## Universal Key

- Power System: The key will contain a small battery system to power the device for use. This battery need not be powerful as the function of the device is minimalistic.

- Bluetooth Communication: This component inside of the key will send a signal when within the appropriate distance from a paired locking system.

- Key Enclosure: The key will be a small device that can easily be carried in someone’s pocket. Therefore, this key enclosure must protect the internal electronics from being damaged. In addition, the enclosure will have a button that allows the device to be paired with the locking device. Once paired, the device should not need to be paired again and will unlock within the set proximity.

# Criterion for Success:
Based on the definition of the problem, it is important that the system operates hands free. This was the primary goal of the project and would extend the audience of the device to users with disabilities. The device must also be able to be manually overridden in the case of a malfunction (something that is taken care of by the alternative mechanical locking system). Finally, the device will be designed to be as cost effective as possible as many of the locking systems currently on the market come at a high price tag.

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