Eelectric Energy Harvesting Through Piezoelectric Polymers Initial Prototype Presentation Don Jenket, II Kathy Li Peter Stone

Initial Prototype April 13, 2004Eelectric Presentation Overview Design Schematics Materials & Processing Justification Circuitry Tail Wire/Electrodes Initial Prototype Unveiling Improvements for Final Design Revised Timeline

Initial Prototype April 13, 2004Eelectric Design Schematic Fan Rectifier Electronics Housing

Initial Prototype April 13, 2004Eelectric Circuitry Schematic AC LED Capacitors Diodes

Initial Prototype April 13, 2004Eelectric Materials & Processing Justifications Circuitry – Germanium diodes Require less voltage to bias (0.2V) Fewest diodes used as possible Fewer voltage drops Less power consumed by the circuit Storage Device Capacitors used to store energy

Initial Prototype April 13, 2004Eelectric “Eel Tail” Schematic Top View Side ViewFront View Cu Wire 12 cm 2 cm 12 cm 2 cm 0.04 mm Cu Wire Silver paste Titanium Electrodes Titanium Electrode Head EndTail End

Initial Prototype April 13, 2004Eelectric Materials & Processing Justifications Tail, Material – PVDF

Initial Prototype April 13, 2004Eelectric Materials & Processing Justifications Tail, Aspect Ratio – 2 cm x 12 cm

Initial Prototype April 13, 2004Eelectric Materials & Processing Justifications Electrodes – Titanium & Silver Paste Gold desired in place of Titanium Easier processing Better properties in air Wires – 5 mil insulated magnet wire Flexible Coiled, Wound, Twisted – noise reduction Can come in contact with other conductors (i.e. flagpole)

Initial Prototype April 13, 2004Eelectric Oscilloscope Data 2cm x 12cm Piezoelectric PVDF in Wind

Initial Prototype April 13, 2004Eelectric Circuitry Schematic AC LED Capacitors Diodes

Initial Prototype April 13, 2004Eelectric Current Progress Working piezoelectric AC Source AC Voltage ~700 mV peak-to-peak Working rectifying circuit Takes >2000 mV AC peak-to-peak to light an LED What needs to be done? Increase Voltage Output from PVDF Tail Connecting multiple tails in series Integrate the two working components

Initial Prototype April 13, 2004Eelectric Improvements on Final Design Layering Two layers Increases possible output Decreases flexibility Difficult to adhere together Adhesive reinforcement Silver Paste alone cannot hold layers together or wires down Kapton and Mylar Tape 2-5 mil thickness should not drastically alter flexibility

Initial Prototype April 13, 2004Eelectric Improvements on Final Design Electrode & Wiring Modifications 12 cm 2 cm Cu Wire Silver Electrode PVDF Gold Electrode Allows for bending freedom Strain relief of wire Run wire straight to flagpole

Initial Prototype April 13, 2004Eelectric Revised Timeline