Patent ID: 8219217

Claim:
An electrical control system configured to control a transmittance of a plurality of variable transmittance windows, said electrical control system comprising: a master unit configured to supply first control signals that are capable of changing the transmittance of the variable transmission windows; a plurality of window control units coupled to said master unit configured to supply second control signals for controlling the transmittance of at least one of the respective variable transmission windows in response to said first control signals or said second control signals a light sensor coupled to said master unit and configured to input light data as to sensed light, wherein said control signals are based upon said light data; a temperature sensor coupled to said master unit and configured to input temperature data as to sensed temperature; and wherein said first control signals from said master unit can override said second control signals for controlling the transmittance of the variable transmission windows; a light sensor coupled to said master unit and configured to input light data as to sensed light, wherein said control signals are based upon said light data; a temperature sensor coupled to said master unit and configured to input temperature data as to sensed temperature; and wherein said first control signals from said master unit can override said second control signals for controlling the transmittance of the variable transmission windows.