A current detection equipment comprises a first coil and a second coil connected in series with the first coil. A first blade is unlocked, and the actuator is actuated to vary its length and bear against the other blade which remains locked. This fuel cell can be a direct alcohol fuel cell. Illustratively, the lower hinge plate and the roller thereon are configured to pivot about a pivot axis of the hinge relative to the bottom panel of the door between a first position generally adjacent the bottom panel of the door and a second position spaced-apart from the bottom panel of the door. Another embodiment of the invention employs two galvo mirrors to scan the laser beam. The system includes at least two radar antennae mounted on blades of a windmill and is configured to apply a compressive sensing technique when the blades do not rotate.