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/