Charge It! EF 152 November 30 th, 2009 Chanci King Andrea Lyons Daniel Stutz Dana Zeitlin

Design Vertical Magnet and coils concealed – Magnet rotates – Coils stationary Shield distributes wind

Cost and Materials Magnetic Cooper Wire$6.59 Magnets$3.00 PVC End Cap$ Dowel Rods$1.34 Paint Roller$9.99 Wood$1.50 Various CardsNo cost ShoeboxNo cost Subtotal$27.29 Tax$2.52 Total$29.81

Mechanical and Electrical Aspects Mechanical Fan blades rotate magnet Electrical Opposing poles spinning within the coils creates an electric field

Calculations ρ= air density ( kg/m 3 ) A= rotor area V= wind speed

Construction 3 Prototypes – Trashed two Difficulty spinning – Wood peg Nails vs. glue Stabilize PVC

Conclusions Smaller is faster Faster rotation creates a stronger electric current Home Depot is better than Lowe’s