P12414: Bicycle Energy Harvester Objective: To transform mechanical energy produced riding a bicycle into electrical energy with intention to charge a cell phone. Our device is designed to be cheap to build, easy to install, maintain and use. Acknowledgements- Special thanks to Ms. Sarah Brownell, R Community Bikes, Gerry Garavuso For more information please visit our website at : IE Lifecycle/Line Balance? Brenda Lisitano – ME [2] Dan Tobin – ME [5] Aaron Sieczkarek – ME [4] Zheng (Flora) Li - EE [1] Amina Purak - IE [3] Background and Motivation: People in countries with inadequate infrastructure have an unmet need for electricity. Sources for creating and storing power are difficult to obtain. This system provides the energy required for communication, light and water treatment. Concept Selection: Initial concepts taken into consideration include harvesting energy via vibration, building a generator with magnets on the spokes, a hub generator and the final design of a roller with a motor. Ease and reproducibility of power harvesting is the main reason for final selection. Background and Motivation: People in countries with inadequate infrastructure have an unmet need for electricity. Sources for creating and storing power are difficult to obtain. This system provides the energy required for communication, light and water treatment. Concept Selection: Initial concepts taken into consideration include harvesting energy via vibration, building a generator with magnets on the spokes, a hub generator and the final design of a roller with a motor. Ease and reproducibility of power harvesting is the main reason for final selection. Results & Conclusions: Our device shows promise for a system that can be manufactured and utilized in countries such as Haiti Future Recommendations: System optimization can be completed by creating iterations with less parts for mass production. Also, waste energy collection can be implemented into the system design. Results & Conclusions: Our device shows promise for a system that can be manufactured and utilized in countries such as Haiti Future Recommendations: System optimization can be completed by creating iterations with less parts for mass production. Also, waste energy collection can be implemented into the system design. Circuit Discussion: The circuit for the device conditions and regulates the electric power generated by a 12V DC motor. The three capacitors stabilize the non-linear voltage input while a 5V voltage regulator reduces the voltage to a 5V constant output. The power is supplied to small electronic devices via an A-type USB connector which is standard. Circuit Discussion: The circuit for the device conditions and regulates the electric power generated by a 12V DC motor. The three capacitors stabilize the non-linear voltage input while a 5V voltage regulator reduces the voltage to a 5V constant output. The power is supplied to small electronic devices via an A-type USB connector which is standard. Program: Solidworks Total Part Files: 29 Distinct Parts SpecificationUnitsIdeal ValueActual Value Device Cost$(US)<20$16.62 Range of BikesTire size (cm)/(in) (cm)/ (in) (cm)/ 24-27(in) Range of Phones% of top 10 selling Haitian phones 90% Dust ProofIEC60529 Level66 Water ProofIEC60529 Level44 Figure 1: Electronics Box Assembly Figure 4: Motor Housing Assembly Figure 2: Motor Assembly [CAD]Figure 3: Electronics Box Assembly [CAD] In order to harvest the bicycles energy the device must output a minimum voltage. This voltage will then be transferred to a device to store the energy for later use. Figure 4: Voltage Regulating Circuit Figure 6: Required Velocity