Abstract: A switch controller is described that permits a single AC load to be controlled by DC signals from multiple switches. In one example of the invention, a switch controller includes a switch-state evaluator that receives DC signals from two or more switches and a load controller, responsive to the switch-state evaluator, that controls an AC load. The switch controller changes the state of the load if there is a change in any one of the switches. The switch-state evaluator may be an Exclusive OR integrated circuit, which receives as inputs DC signals from user switches, and a Not OR integrated circuit, which receives as inputs the output signal from the Exclusive OR integrated circuit and DC signals from a disable switch and an override switch. The load controller may be an opto-isolator and a triac.