[1]. mardreagus williams electrical engineer -electrical subsystem design - hardware design
TRANSCRIPT
Bully Power Station
Final Presentation
October 7, 2014
[1]
Team Members
Lesley Brown
Electrical Engineer
- Hardware Fabrication
- Hardware Design
Graciela Perez
Computer Engineer
-Software and Hardware Design
- PCB designer
Mardreagus Williams
Electrical Engineer-Electrical Subsystem
Design
- Hardware Design
Dr. Michael S. Mazzola, P.E.
Stephen Shambra
Computer Engineer
- Software Design
- GUI Development
Outline
Problem Solution Constraints
Technical
Practical
System Overview Progress Improvements Testing Timeline
Problem
There is a need for charging personal electronic devices in locations where typical 120VAC electrical outlets or USB ports are unavailable.
common areas on school campuses
public recreational sites
outside concerts or sporting events
A secure means to charge a personal electronic device unattended.
Solution
[7]
The Bully Power Station will provide a secure and affordable off-grid renewable energy charging source for personal electronics.
Jack Hatcher Chair in Engineering EntrepreneurshipEntrepreneurship Center Advisory Board (ECAB)
Power of Ra
Technical Constraints
Constraints Description
Power Requirements The solar panel must be coupled with a battery to function during night time usage and instances or periods without adequate sunlight.
Battery Protection The battery must be protected from deeply discharging and overcharging according to predetermined specifications provided by the manufacturer
Output Power The unit must be able to output a range of power from 10W to 40W.
User Interface The user interface must display when charging station has power available, the user’s remaining charge time, and whether the station is in normal operation or a low power state.
Secure Enclosure The charging station must provide a secure enclosure for users to leave a device unattended while charging
Practical Constraints
Category Name Description
Environmental Weatherproofing Charging station must be able to operate in areas where precipitation is likely to occur.
Health and Safety
Protection Wires must be properly insulated and the battery must be inside an enclosure.
Practical Constraints
Environmental
The housing of the charging station electronic modules and battery must prohibit entry of water from precipitation as impurities in rainwater may corrode and damage components.
Practical Constraints
Health and Safety
All wires in unit must be insulated to avoid shock to users.
A NEMA (National Electrical Manufacturers Association) enclosure must be present in design to mitigate incidents involving battery or battery fluid (i.e. battery fluid leak, battery explosion).
Solar Panel
Charge Controller
BatteryDC Power
DC/AC Inverter
AC Power
Microcontroller
User Interface
System Overview
[7]
[8] [9]
Progress
Progress - (Devices Charging)
Progress - (User Interface)
Card Reader
Monitor
Keypad
Progress - (Normal Operation)
Progress - (Normal Operation)
Progress - (Normal Operation)
Progress - (Normal Operation)
Progress - (Normal Operation)
Progress - (Normal Operation)
Progress - (Low Power state)
Progress - Schematic
Progress - Subsystems
Progress - Subsystems
Progress - Subsystems
Progress - PCB
3.0
5 inch
es
3.05 inches
Improvements
Additional User
• Implementation of a second security box that will accommodate another user
• The second security box will only accommodate cell phones
Modifications to First Security Box
• Added a limit switch to determine if the security box is open/closed
• The station will give a sound to notify the user has left the security box open after a session
Testing
Battery Monitoring
Battery Status
12 Volt Battery
Arduino
Critical 11.5V 3.66V
Critical 12.0V 3.71V
Okay 12.5V 3.86V
Okay 13.0V 3.93V
Battery Analysis
Current (Amps)
System Consumption 0.7 (700mA)
Charger controller 0.006 (6mA)
Magnetic Lock 0.060 (60mA)
Total
0.766 (766mA)
Timeline
Augus
t
•Software Improvements
•PCB Design
September
•Ordered Remaining Parts for PCB
•Hardware Improvements
Octobe
r
•Populate PCB
•Start Testing
November
•Finalize Testing
•Complete Final Design
Sources[1] (2014, February 23). “Solar Sprout” [Online]
Available: http://www.dreamstime.com/stock-images-concept-solar-panel-green-energy-image14098504
[2] (2014, February 23). “MPPT and PWM Controllers” [Online]
Available: http://solar.altestore.com/search?w=controller&view=grid&x=0&y=0
[3] (2014, February 23). “Deep Cycle Batteries” [Online]
Available: http://solar.altestore.com/search?w=battery&view=grid&x=0&y=0
[4] (2014, February 23). “Solar Panels” [Online]
Available: http://solar.altestore.com/search?w=solar+panel&view=grid&x=0&y=0
[5] (2014, February 23). “Arduino Mega Development Board” [Online]
Available: http://evolutiontoys.com/arduino-mega-atmega-128016au-p-216.html
[6] (2014, February 23). “Raspberry Pi Development Board” [Online]
Available: https://www.modmypi.com/raspberry-pi-model-a
[7] (2014, February 24). “Security Lock Boxes” [Online]
Available: http://www.cdw.com/shop/products/Black-Box-Security-Lockbox-rack-lock-box-3U/2079412.aspx
[8] (2014, March 3). “Battery Clipart” [Online]
Available http://www.clker.com/clipart-146793.html
[9] (2014, March 3). “Smartphone Clipart” [Online]
Available: http://www.clipartlord.com/category/home-clip-art/appliances-clip-art/mobile-phones-clip-art/smartphone-clip-art/