1. EEL4914. 001: Senior Design Project Comprehensive Design Review Calvin Likens Hoang Nguyen Jesse Minor Neil Cammardella Van Nguyen Advisor: Dr. Wiley Spring 2015 Pro-S Throwable Generator

2. Problem: Power demand for mobile electronics is growing beyond the reach of the electric utility grid Proposed Solution: A portable, throwable generator and wind turbine system that harvests kinetic energy to charge an onboard battery Introduction

3. Generator Housing Voltage Regulation GeneratorBattery Management USB Output Overview

4. ●Curved Tail-Fins ○Increases rotational speed ○Improves accuracy ●Turbine Blades ○Protected ○Counter-Rotating ●Removable Fins ○Removable battery pack ○Water Resistant seal ○Allow other attachments Figure 3: housing of the generator Generator Housing

5. ●Wind Turbine Mode ○Replace tail with mount ○Continue charging when not in use ●Flexible Uses ○Beach umbrella ○Bicycle handlebars ○Treebranch Figure 3: housing of the generator Generator Housing

6. ●Generated Voltage ○Starts Producing at 6-7 MPH ○4 Volts at Throwing speed ●Generated Current ○Isc peaks between 15-35 MPH ○135mA in Throwable range ○135mA in bicycle range Generator Data

7. When the ball is thrown by right hand When the ball is thrown by left hand Output Voltage of DC Generator Rectifier

8. Schematic of a negative converter The active diode principle Schematic of comparator circuit with differential stage, common-source output amplifier, and inverter stage. ●Small ac signal < 0.3V ●Voltage drop ~ 0.03V Rectifier

9. Rectifier - Simulation

10. As our device is limited by the amount of allowable weight it is imperative that every option be considered that results in a weight loss while still performing as intended. The BQ25504 eliminates unnecessary weighted circuity for MPPT, OV, UV, Battery Temp sensor, Boost Converter, & Local Oscillator. All totaling an excess of (x)g+ now reduces into the size and weight of 1 Integrated circuit weighing under 1g. BQ25504 Voltage Converter/Regulator

11. Lithium Ion battery need to be charged with the constant current. When the voltage reach the constant voltage charge 4.2 V, then the current has to decrease to maintain the voltage 4.2V Lithium Ion rechargeable battery Charge voltage4.2V Nominal voltage3.7V Capacity2000mAh Energy Storage

12. V \LedGreen Yellow Red 4.2 On 4.0 On 3.8 On 3.6 On 3.4 On Battery Status Indicator

13. MAX8815A Up converts to 5V USB LTC4054 Charge Regulator USB Output

14. Implementation Timeline

15. ●Most surveyed showed a level of interest in the product ●Many different scenarios for use ○Camping ○Beach ○Tailgating ○Parks ●Market Risks ○All balls and sports equipment ○Battery packs ○Portable solar and wind chargers Market Research

16. 1.Dhanush the Indian Bofors. (2013, October 12). Retrieved from Indian Defence Forum: http://defenceforumindia.com/forum/indian-army/56788-dhanush-indian-bofors-3.html 2.Baddi, R. (2013). Transistor as a rectifier. Ganeshkhind: National Center for Radio Astrophysic. 3.D. Maurath, C. P. (2008). Highly efficient integrated rectifier and voltage boosting circuits for energy harvesting applications. Freiburg: Advance in Radio Science. 4.Lithium-ion Polymer MLP67436 rechargeable battery. (2011, July 26). Retrieved from http://www.mouser.com/ds/2/272/Specification%20for%20MLP674361-216668.pdf 5.Super Capacitor. (2010, December 15). Retrieved from Battery University: http://batteryuniversity.com/learn/article/whats_the_role_of_the_supercapacitor 6.Supercapacitor. (2014, October 7). Retrieved from Wikipedia: http://en.wikipedia.org/wiki/Supercapacitor#Self-discharge 7.Ultra Low Power Boost Converter with Battery Management for Energy Harvester Applications. (2013). Retrieved from http://www.ti.com/lit/ds/symlink/bq25504.pdf 8.Boost Converter. (2014) Retrieved from http://en.wikipedia.org/wiki/Boost_converter 9.USB Battery Charging Specification. (2010, December 7, 2010). Retrieved from http://www.usb.org/developers/powerdelivery/ References