DynoCharger Bicycle Powered Cell Phone Charger

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Presentation transcript:

DynoCharger Bicycle Powered Cell Phone Charger Senior Design Fall 2008 - Group 3 Matt Buchman, Gjergji Demirasi Cheong-Shun Lok, Tomi Prifti Gjergji Shaska, Scott Sheridan Product Features The phone can be charged while riding, or disconnected from the bike The NiMH battery pack takes 6.5 hours to fully charge The cell phone takes 2.5 hours to fully charge The output meets the USB specification (5V at up to 0.5 A) Proposed design of product Block diagram of electrical circuit Flowchart of control algorithm A change of 5 degrees C indicates a complete charge Product Prototype USB 5V, 0.5A output Estimating Production Cost Parts cost per unit is around $24. Labor assembly cost is $13.75 per unit Total cost is estimated at $37.75 Estimated retail price at 40% mark up is around $53 Standard NiMH AA batteries Dynamo input Charge indicator LED