Abstract: The present invention describes a method for controlling electrical power supply to a personal computer installation, which may have a number of peripheral devices attached, such as printers, monitors etc. The method includes providing a first controlled power outlet adapted for supplying electrical power to a plurality of first devices and then monitoring, by use of software running on a personal computer, usage of at least one input device of the personal computer as well as a processor(s) associated with the computer, as well as the power level and power usage and then when the power usage mode is determined to be such that the first devices are not required to be powered, controlling the first controlled switch to remove power from the first controlled power outlet.

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.