Piezoelectric transducer for an energy-harvesting system

A device, comprising:

• a substrate including a recess having a base and a sidewall, the base extending in a first direction, the sidewall extending in a second direction that is transverse to the first direction;
• a moveable mass coupled to the base, the movable mass configured move in the first direction;
• a plurality of cantilever piezoelectric elements extending from the sidewall towards the moveable mass;
• a plurality of first magnetic elements on the plurality of cantilever piezoelectric elements, respectively;
• and
• a plurality of second magnetic elements on the moveable mass.

A device, comprising:

• a substrate including a surface;
• a moveable mass coupled to the surface of the substrate, the moveable mass configured to move in a first direction;
• a cantilever piezoelectric element coupled to the moveable mass, the cantilever piezoelectric element extending in a second direction that is transverse to the first direction;
• and
• a first magnetic element on the cantilever piezoelectric element;
• and
• a second magnetic element on the surface of the substrate, the first magnetic element being positioned on the cantilever piezoelectric element such that the first magnetic element overlies the second magnetic element when the moveable mass moves in the first direction.