Abstract: Provided is an energy harvesting device, comprising a first shell having a longitudinal axis, wherein the first shell defines a cavity, and a second shell, wherein the second shell is mechanically connected to the first shell via a flexible cord, wherein the cavity comprises therein a bearing, an electrical generator, and a battery, wherein the bearing is mechanically coupled to a rotor of the electrical generator at a first end and an end of the flexible cord at a second end, such that rotation of the flexible cord about the longitudinal axis rotates at least a portion of the bearing to generate electrical power, and wherein the rotor is in electrical communication with the battery, such that the battery stores at least a portion of the electrical power generated by the electrical generator.

Abstract: A ball includes a shell defining a spheroid. The shell includes an opening and a panel to close the opening. The panel has a sleeve that extends radially inward. A generation module is disposed in a cavity defined by the shell. The generation module includes a housing. A pendulum, an electric generator, and a battery are disposed in the housing. The pendulum is mechanically coupled to a rotor of the electric generator at a first axis of rotation of the pendulum and the electric generator is electrically coupled to the battery. An acceleration of the ball causes the pendulum to rotate about the first axis of rotation. The rotation of the pendulum rotates the rotor of the electric generator. The rotation of the rotor of the electric generator generates electricity, and at least a portion of the generated electricity is stored by the battery.

Abstract: A jump rope includes a first handle and a second handle. A rope connects the first handle and the second handle. The first handle defines a cavity. A generation module is disposed in the cavity and is fixed relative to the handle. The generation module includes a bearing, an electric generator, and a battery. A rotor of the electric generator is mechanically coupled to the bearing and an end of the rope is also coupled to the bearing. The electric generator is electrically coupled to the battery. Rotation of the rope relative to the handle causes at least a portion of the bearing to rotate relative to the handle. The rotation of the bearing rotates the generator which generates electric energy, at least a portion of which is stored in the battery.

Abstract: A ball includes a shell defining a spheroid. The shell includes an opening and a panel to close the opening. The panel has a sleeve that extends radially inward. A generation module is disposed in a cavity defined by the shell. The generation module includes a housing. A pendulum, an electric generator, and a battery are disposed in the housing. The pendulum is mechanically coupled to a rotor of the electric generator at a first axis of rotation of the pendulum and the electric generator is electrically coupled to the battery. An acceleration of the ball causes the pendulum to rotate about the first axis of rotation. The rotation of the pendulum rotates the rotor of the electric generator. The rotation of the rotor of the electric generator generates electricity, and at least a portion of the generated electricity is stored by the battery.

Abstract: Our invention hybridizes ‘ball sports,’ including soccer, baseball, tennis, and etc., and devices converting mechanical energy (through impact or shaking) to produce power while playing or participating in sports. Modifications include embedding sensors into a ball to identify the degree of kicking or hitting, or utilize them in the context of other computer or AV-based games. The energy-producing ball embeds the coiled-impact sensors and/or shake-to-charge technology, vibration, or other piezo-electric materials to convert the mechanical energy of kicking, hitting, or bouncing into electrical energy. The energy can be stored internally, internally on a removable device, externally, or in some hybrid. The ball can be a source of light, contain housings for light sources or battery-charging adapters, or plugged into other energy-collection/storage units. The stored energy within the ball can be used to charge batteries, power light sources, cell phones, radios, or other electrical products.