**Patent Pending - United States 61928067**
What is piezoelectric energy harvesting?
Piezoelectricity translates to “electricity from pressure.” The prefix piezo in Greek means to press or squeeze. Piezoelectric materials exhibit the piezoelectric effect. This allows a mechanical force to be applied to the material to deform it slightly and the material will produce an output electric power. This is done by rearranging the dipoles of the piezoelectric material. This rearrangement causes a change in the dipole density and therefore a change in the electric field between the dipoles. Because of this change in the electric field, the piezoelectric material produces an output electric power.
What will be accomplished in this Instructable?
Completion of this Instructable will result in a piezoelectric energy harvesting "boot." With use of other electronic components, this unit will be able to power other small devices that have a low power consumption. Total project cost (for 1 unit) is ~ $100.
Step 1: Decide what size the unit should be. Draft it in a CAD program, both in 2D and 3D.
When drafting, be sure to know the size of the piezoelectric disks that will be used. Consider spring placement and sizes of springs. The springs that were used in this unit were about 1.5cm in diameter. Think ahead to all aspects of design from disk placement, spring placement, to where guide bolts will be placed and connecting bolts will be placed. Also think about wire management. The wires can sit next to the disks, but it doesn’t look neat and clean. It will be helpful to see all of this digitally when it comes to assembling the unit.