An electrically-operated architectural covering that can be powered by a low current or voltage source includes a motor, an accumulator connected to the motor, a power source, and an electrical circuit connecting the power source to the accumulator. The electrical circuit includes a step-up converter, which preferably includes an input terminal connected to the power source; an output terminal with a supply voltage connected to the accumulator; an inductive element; a first switch having a gate electrode for opening and closing of the switch when a control voltage of a first level is applied to the gate; and an oscillator.