1. An electronics rack with an electrically controlled panel, the rack comprising:a base, at least four side walls and a top, the base, sidewalls and top defining an enclosure with an interior, the enclosure having at least one opening in at least one sidewall or the top for accessing the interior of the enclosure;
at least four vertical supports attached to and extending up from the base for supporting the side walls and the top;
at least one panel mounted to the enclosure for permitting controlled access to the interior of the enclosure;
at least two electronically controlled hinges mounted to opposite sides of the panel, each hinge having a hinge axis about which the panel can rotate when the hinge on the opposite side of the panel is unlocked, the hinge axes of the two hinges being parallel to one another, each hinge including a hinge pin that is slidable in a housing between a retracted position and an extended position, a portion of the hinge pin extending out of the housing and into a recess in a hinge cup in the extended position, and wherein the portion of the hinge pin is substantially retracted into the housing and out of the recess in the hinge cup in the retracted position, the housing of each hinge being attached to one of either the panel or the enclosure and the hinge cup is mounted to the other of the panel or the enclosure, each hinge further including an electronically controlled drive mechanism for controlling reciprocation of the hinge pin relative to the housing;
wherein when the hinge pins on the two hinges are in their extended position and in the recesses of the hinge cups the panel cannot be rotated about either hinge axis, and wherein when the hinge pin of one of the two hinges is in its retracted position and the hinge pin of the other of the two hinges is in its extended position, the panel can be rotated about the hinge axis of the hinge that has the hinge pin in its extended position.