A control device for detecting human motion based on a pyroelectric effect and for generating an electrical signal to control a communicable machine based upon the detected motion, the control device comprising: a first array of top graphene electrodes (205, 305) facing the human and configured to be selectively activated in response to one of an x-position or a y-position of at least a portion of a human body relative to the first array, each top graphene electrode comprising at least one of single layer graphene, bilayer graphene, multilayer graphene, reduced graphene oxide and graphene platelets; at least one pyroelectric active layer (206, 306); and a second array of rear electrodes (207, 307) configured to be selectively activated in response to another one of the x-position or the y-position of the at least a portion of the human body relative to the second array, the first array extending perpendicular to the second array; characterized in that each top graphene electrode (205, 305) is infrared transparent and is configured to enable transmission of infrared radiation, emitted from a portion of the human's body in a motion of the human relative to the control device, to the at least one pyroelectric active layer; wherein the at least one pyroelectric active layer (206, 306) is configured to undergo a reorientation of dipoles in response to the infrared radiation received through the first array of top graphene electrodes; wherein the first array of top graphene electrodes (205, 305), the at least one pyroelectric active layer (206, 306) and the second array of rear electrodes (207, 307) define at least one detector element configured to generate the electrical signal, in response to the motion of the human relative to the control device, based on the reorientation of the dipoles in the at least one pyroelectric active layer (206, 306); and wherein in use, the control device detects the motion of the human relative to the control device without contacting the human. a first array of top graphene electrodes (205, 305) facing the human and configured to be selectively activated in response to one of an x-position or a y-position of at least a portion of a human body relative to the first array, each top graphene electrode comprising at least one of single layer graphene, bilayer graphene, multilayer graphene, reduced graphene oxide and graphene platelets; at least one pyroelectric active layer (206, 306); and a second array of rear electrodes (207, 307) configured to be selectively activated in response to another one of the x-position or the y-position of the at least a portion of the human body relative to the second array, the first array extending perpendicular to the second array; characterized in that each top graphene electrode (205, 305) is infrared transparent and is configured to enable transmission of infrared radiation, emitted from a portion of the human's body in a motion of the human relative to the control device, to the at least one pyroelectric active layer; wherein the at least one pyroelectric active layer (206, 306) is configured to undergo a reorientation of dipoles in response to the infrared radiation received through the first array of top graphene electrodes; wherein the first array of top graphene electrodes (205, 305), the at least one pyroelectric active layer (206, 306) and the second array of rear electrodes (207, 307) define at least one detector element configured to generate the electrical signal, in response to the motion of the human relative to the control device, based on the reorientation of the dipoles in the at least one pyroelectric active layer (206, 306); and wherein in use, the control device detects the motion of the human relative to the control device without contacting the human.