Abstract: A power supply control device for supplying power to a number of electrical devices from a single mains supply electrical outlet switch means adapted to connect an electrical supply from the supply electrical outlet to each of the controlled electrical outlets in response to the state of a master electrical device, a state sensor adapted to detect a functional state of the master electrical device, said sensor being adapted to distinguish at least three functional states of the master device. The master device may be personal computer with peripheral devices connected to the controlled outlets.

Abstract: A power supply control device for supplying power to a number of electrical devices from a single mains supply electrical outlet switch means adapted to connect an electrical supply from the supply electrical outlet to each of the controlled electrical outlets in response to the state of a master electrical device, a state sensor adapted to detect a functional state of the master electrical device, said sensor being adapted to distinguish at least three functional states of the master device. The master device may be personal computer with peripheral devices connected to the controlled outlets.