An apparatus for generating electrical energy from a first motion having a low and/or variable frequency. The apparatus including: a first device to which the first motion is transferred; and a second device to which the first motion is transferred from the first device, the second device operating at a second motion having a frequency which is higher and/or more constant that the first motion. Wherein the first device comprises one of a first rotating shaft or first translating mass; the first shaft or first mass includes a tip interacting with the second device to transfer the first motion thereto, the second device comprises a mechanism having an electrical energy generator for converting the second motion to electrical energy; and the electrical energy generator comprises a rotary or linear coil and magnet generator or a piezoelectric generator. The interaction of the tip with the shaft or mass can be contactless.