bicycle powered cell phone charger ece 491 / me 492 – fall 2008

Bicycle Powered Cell Phone ChargerECE 491 / ME 492 – Fall 2008

Purpose: Develop a device to charge a cell phone using free energy within 8 hours.Product: A bicycle powered generator.Description:

Transfer Storage Battery

Charges Storage Battery

Electronics

Utilizes Cigarette Lighter to Charge Cell

Phone

Charging Station

Smart Charging Circuit Schematic

R 13 6 0

C 12 5 0 F

C 2

1 0 0 u F

C 33 3 0 u F

D 1

D 2

Q 1Q 2 N 2 2 2 2

L 1

1

2

C 41 0 0 u F

V o u t

7 . 2 V d cV in p u t1 2 V d c

D 2s w it c h d io d e

logic gate

logic gate

logic gate

+5v

-5v

LED

R3

C7R14R13R15

R7C4R6

C5

R1

R4

R11

R16C2R5R12

R9

Q2 R2

Q3

Contacts Bicycle TireGenerator

Jim Karl(ME)

Michael Megiveron

(ME)

Brilleasha Moore(EE)

Ryan Sredzinski

(ME)

Frank Walega

(ME)

• A gear box rigidly mounted to a bicycle frame rotates a DC motor used as a generator. • A rubber wheel contacts the bicycle tire to rotate the gears of the drive train. • The power generated by the motor powers a smart charging chip.• A intermediate storage battery is either fast, trickle, or not charged based on the battery’s voltage.

• When the battery is done charging it is transferred to the charging station where the cell phone can be charged with a cigarette lighter charger.