Abstract: A DC-to DC power conversion system (100) comprising a first DC input (21), an auxiliary DC input (22), a switching module (25), a boost module (30), and a control module (10). At least one renewal energy-based first input source is providing the first DC input (21). The switching module (25) is in electrical communication with the first DC input (21) and the auxiliary DC input (22). The boost module (30) is in electrical communication with the switching module DC output (50). The control module (10) controls the boost module (30) based on the magnitude of first DC input (21) from the renewal energy-based first input source, to selectively operate a control circuitry and provide an output therefrom acting as an input to an external DC load (50). This invention ensures direct DC-DC power conversion without involving any kind of AC conversion thereby saving huge electric power losses.

Abstract: A phototherapy face mask is provided for emitting therapeutic radiation towards the facial region of a user and aims to restore the youthful appearance of the user who is wearing the mask. The phototherapy mask comprises an outer surface and an inner surface, wherein the inner surface is aligned with the facial skin of the user. A flexible PCB layer is provided between the inner surface and the outer surface, on which a plurality of coherent light sources such as LEDs are mounted. The light sources are configured to emit radiation preferably in the visible and infrared range of the electromagnetic spectrum. The mask further includes a medicament chamber which is operably coupled to a piezoelectric pump that dispenses the medicament at regular intervals. The medicament is uniformly distributed all over the facial region of the user through a plurality of pores of the mask.