Pedal Powered Generator for Mobile ChargingPedal Powered Generator for Mobile ChargingHaiying Lu (ECE) │ Jason Xu (ECE) │ Kimo Spector (MEMS) │ Norman Pai (ECE) │ Tiffany Kuo (ECE)

SpecificationsObjective•Design a portable and fast charging device harnessing human-generated power

•Provide a reliable source of energy for charging mobile phones.

•Market device for sale to vendors (NGOs, entrepreneurs) in developing countries.

•Vendors can charge using a per-use model Less than $0.05 each time a customer charges a phoneMobile Phone = Life LineTwo-thirds of the world’s five billion plus mobile phone users live in developing countries. Over 2 billion of them are in areas without reliable electricity sources.

Cell-phones are critical communication tools:• Trade – Buy and sell crops, obtain price quotes• Healthcare – Connect remotely to health professionals• Banking – Conduct transactions like deposits and withdrawals

Acknowledgments Project funds provided by Rice Electrical and Computer Engineering (ECE) Department and Oshman Engineering Design Kitchen (OEDK). Thanks to our mentors: Gary Woods (ECE), Richard Gerhold (Consultant), and J.D. Wise (ECE).

Results User pedaling outputs (depending on effort):• Easy-moderate pace: 30 watts•Charge 1 cell phone in less than 15 minutes

• Strenuous pace: 65 watts (max)•Belt slippage occurs when faster

G-Ped System

Existing Chargers

Datexx Super-Battery

A portable hand crank phone charging device.

Name Charge Time per phone

# Phones Supplied

Storage Capacity

G-Ped 10-15 min.

3 15 Ah

DatexxSuperbattery

~72 min. 1 1.7 Ah

BioLogic ReeCharge

~80 min. 1 N/A

Nokia Bike Dynamo

~60 min. 1 N/A

Criteria Value

Size 3.0 x 2.16 x 1.16 ft

Cost $300

Output Devices 3 phones

Output Specs 3 x (5V, 1A)

Battery Storage 15 Ah

Encasing Weather proof

Weight 36 lbs incl. battery

Pedal Time 40 minutes

SolutionG-Ped is specifically designed for cell phone users in developing countries.

• Independent system• Rigid structure • Weather and dust proof• User friendly• Easy to maintain

G-Ped is adaptable to the Universal Charging Solution (UCS) that will be used by virtually all mobiles made after 2012.

* = Typical 860 mAh cell phone battery

Pedal System

Energy Conversion

Input Board

Energy Regulation

Control Board

Energy Readings

Battery System

Energy Storage

Output Board

Energy Division

Cell Phones

Energy Recipient

Side view of system

Isometric view of system 27.6% charged

13.6% charged

0 60

120

Area = Total Energy Generated in 2 minutes

•User display LEDsGreenGreen – Battery chargedYellowYellow – Charging

(sufficient RPM)RedRed – Battery empty

2

34

6

5

1