A voltage generator (1) for converting non-electric primary energy (PE) into a voltage signal (USIG, USIG') by means of induction, characterized in that it comprises at least one mechanical energy accumulator (2) for receiving said primary energy (PE), said energy accumulator having at least one turning point (P); at least one induction system (3) which can be coupled to the mechanical energy accumulator (2), said mechanical energy accumulator (2) performing a movement when the at least one turning point is reached, enabling a voltage signal (USIG, USIG') to be induced in the induction system (3).