Bully Blue Lock

Final Presentation 2014Senior Design I

Team Members

• Trey Gary (Team Leader)• Team Coordinator• Hardware Assembly

• Travis Green• Product Designer• Software Developer

• Chase Wrenn• Product Researcher• Hardware Researcher

• Tope Daramola• Web Designer• Software Developer

• Dr. Morris• Faculty Advisor

Overview• Problem• Solution• Constraints• System Overview• Prototype• Testing• Improvements

Problem and Solution

Problem• Sharing access is limited to keys or

combinations both of which can be copied• Basic padlocks do not have the capability of

being monitored• Loss of authority over padlock when access

has been shared among other users

Solution• Create an electronic, wireless lock that doesn't

rely on physical keys or combinations• A Smartphone application will make the

owner’s phone the “key” to the padlock• The owner can share access with other users

and never lose authority over the padlock

Design Constraints

Technical ConstraintsName Description

Wireless Communication Blue Locks must communicate with a smart phone application to allow users to unlock the device from at least 1 yard.

Power Supply The Blue Lock will rely on a main battery, while also providing a reserve battery for instances of main battery depletion.

Application A smart phone application, initially iPhone, will allow owners to share access to the Blue Lock with one additional user.

Physical Specifications The Blue Lock will not exceed physical dimensions of 4-1/2''x2-1/2''x1-1/4''

Manual Backup In instances of phone failure, the lock will provide a push button backup.

Practical Constraints

Name Description

Manufacturability The Blue Lock will have a removable internal core to allow for battery and component replacement.

Sustainability The Blue Lock will endure weather conditions and application will have updatable software.

ManufacturabilityThe device has:• an inner core that houses the locking, processing,

and communication components.

• accessibility to the inner core to replace battery and inner core components.

• an outer core that encases the inner core for physical security.

SustainabilityThe Lock has:• weather resistant components• one year long battery lifespan

The software has:• application update can be easily downloaded from

app store

System Overview

Internet Server

PhoneApplication

(owner)

Phone Bluetooth Module

Lock Bluetooth Module

Unlocking Mechanism (i.e. motor)

PhoneApplication

(guest)

Power Supply

Prototype

Breadboard Layout

Breadboard & Lock

Schematic

Application Screenshots

Testing

Testing: RangeBlue Locks must communicate with a smart phone application to allow users to unlock the device from at least 1 yard

1. Lock and phone are set up 5 yards away

2. Attempted to connect3. If connected, record signal

strength4. Move in 1 yard5. Repeat steps 2-5 till lock

and phone are within arms length

Testing: Power Consumption1. Measure battery 2. Cycle motor until unlock3. Measure battery 4. Take average5. Extrapolate

The Blue Lock will rely on a main battery, while also providing a reserve battery for instances of main battery depletion.

Voltage range = Starting voltage –cutoff voltage

Voltage range / voltage drop = cycles

Testing: Manuel Backup

Testing: Sharing

1. Owner registers2. Owner looks for other

party’s user name 3. Permissions are sent to

other party via internet connection

4. Other party receives permissions

Sending and accepting permissions

A smart phone application, initially iPhone, will allow owners to share access to the Blue Lock with one additional user.

Testing: Size

Through – hole Layout• 3.05 x 3.20 (in)

The Blue Lock will not exceed physical dimensions of

4-1/2''x2-1/2''x1-1/4''

Testing: Size• Surface Mount Layout• 1.65 X 2.45 (in)

Improvements• Ability to show that the lock was actually locked back.

• Continue improving PCB.

Questions?

Bully Blue Lock

Final Presentation 2014Senior Design I