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Bully Blue Lock
Midterm Presentation 2014Senior Design II
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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
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Overview• Problem• Solution• Constraints• System Overview• Prototype• Testing• Improvements
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Problem and Solution
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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
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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
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Design Constraints
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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.
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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.
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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.
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SustainabilityThe Lock has:• weather resistant components• one year long battery lifespan
The software has:• application update can be easily downloaded from
app store
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System Overview
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Internet Server
PhoneApplication
(owner)
Phone Bluetooth Module
Lock Bluetooth Module
Unlocking Mechanism (i.e. motor)
PhoneApplication
(guest)
Power Supply
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Prototype
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Schematic(Updated)
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Breadboard Layout
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Breadboard & Lock
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Application ScreenshotsUpdates are in progress to support iOS 8
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Testing
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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
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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
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Testing: Manuel Backup
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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.
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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''
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Testing: Size• Surface Mount Layout• 1.65 X 2.45 (in)
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Improvements
1.9 x 0.7 in
Continue improving PCB
1.78 x 2.35 in
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Additional Improvements
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Additional Improvements
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Questions?
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Bully Blue Lock
Midterm Presentation 2014Senior Design II