Abstract: An addressable electronic switch which switches power to an electromechanical device upon detection of an individual access code in a serial data stream. The addressable switch is capable of series connection with a host computer and other peripheral devices. The switch circuit receives a serial data stream containing access code information for one or more of such switches as well as data to be transmitted to another peripheral device, detects the presence of an individual access code within the data stream and causes a switching action in response thereto, and retransmits all data except its own detected access code.