1. DynoCharger Bicycle Powered Cell Phone Charger
Senior Design Fall 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