Patent ID: 8324819

Claim:
An electric appliance control, for automatically turning off an electric appliance operating in an indoor space, the electric appliance control consisting of: a light sensor, for continuously sensing the light intensity in said indoor space; a fall detector, for detecting a fall in the light intensity sensed by said light sensor, wherein said fall being a negative relative change in light intensity during a period of hundredths of a second; a switch, for disconnecting the electrical power supply to said electric appliance; and a control unit, having a single voltage comparator for sensing voltage change via at least one of a capacitor and a coil, wherein only during a fall in the light intensity, said comparator provides a voltage energizing a coil for activating said switch to disconnect said power supply upon detecting a fall in light intensity by said fall detector, thereby also providing proper operation in an indoor surrounding lighted by an outdoor light source.