Transcript Microelectronics… - Oakland University

ME 492 Fall 2008 – A Bicycle-Powered
Cell Phone Charging System
Bryan Brockert, Ahmad Sahib, Alex
Galvan, Lenardo Burton, Alex
Todoroski, Crystal Toporek
Voltage rectifier/regulator circuit.
4 120-farad supercapacitors.
AC to DC
converter
The finished waterproof container for the capacitors
and circuit.
Voltage
Regulator
DC Voltage
Desired
Voltage
AC
Voltage
Intermediate Storage
Device
Bike
Generator
Basta/Union 6v, 3W wheel dynamo.
Goals
Cell Phone
One of the cellular phones used for testing.
-Harnesses a standard bicycle instead of using grid electricity or
burning fuel.
-Provides enough power to charge a cell phone in under 8 hours.
-Remains lightweight, portable, and easy to use.
Design/Implementation and Results
-System uses a Basta/Union wheel dynamo to generate electricity
on the principal of Faraday’s Law.
-A purpose-built integrated circuit converts the voltage from AC to
DC and attenuates the generated voltage.
The dynamo mounted to a bicycle on a stationary “trainer”
for testing.
-Charge is stored in 4 supercapacitors, which are housed in a
waterproof, bike-mountable container.
-A “universal” output allows the connection and charging of
practically any cellular phone.
-In order to charge the capacitors enough to charge a standard cell
phone battery, a user only has to ride the bicycle 15 miles.
-On a full charge, the capacitors provide 2.5-3 hours of charge time.
The finished product before final packaging.