Abstract: An energy harvester comprising a base; one or more first resilient means mounted on the base; a hollow chamber having a mounting point pivotally attached to the first resilient means; a hollow member enclosed within the hollow chamber being attached to one or more second resilient means extending from the mounting point in static equilibrium such that the center of mass of the hollow member is aligned with the second resilient means at a vertical axis; a plurality of piezoelectric material-built cantilevers mounted on the hollow member; an integrated circuit connecting the hollow chamber, hollow member, and piezoelectric material-built cantilevers with at least one of a primary storage and a device, wherein the energy is harvested through vibration of the plurality of piezoelectric material-built cantilevers at its approximately resonant frequency, reciprocation of the hollow chamber and the hollow member upon application of a force.

Abstract: An apparatus for solar tracking using minimal energy is described. A prismatic energy harvester (10) is positioned above a spring (20). The harvester has a pair of ears (14) at both side of the top portion of the harvester. The ear is moved by strings (16) from a reel (18) connected to a box of motor (12). At least two photo-resistive elements track the sun rays intensity to identify the position of the sun. Then, the motor adjust the reels to rotate the harvester using strings until the harvester and the sun is at right angle. The photo-resistive elements continuously track the sun so that the harvester can be rotated towards the sun at right angle.

Abstract: An energy harvester (100) comprising a base (110); one or more first resilient means (120) mounted on the base (110); a hollow chamber (130) having a mounting point (131) pivotally attached to the first resilient means (120) in static equilibrium in such a way that centre of mass of the hollow chamber (130) is aligned with the first resilient means (120) at the vertical axis; a hollow member (140) enclosed within the hollow chamber (130) being attached to one or more second resilient means (150) extending from the mounting point (131) in static equilibrium that centre of mass of the hollow member (140) is aligned with the second resilient means (150) at the vertical axis; a plurality of piezoelectric material-built cantilevers (160) mounted on the hollow member (140) and spaced apart from one another in a predetermined gap at the vertical planar that the piezoelectric material-built cantilevers (160) are varied in length and/or centre of mass; a primary storage (170) associated with the hollow chamber (130),