Patent ID: 8278845

Claim:
A controller configured to power and control a behavior of a system of lights, one or more of said lights associated with each of a plurality of lighting modules, each of said lighting modules serially addressable over a two-wire communication network, said controller comprising: a processor configured to output command and address data to said two-wire communication network to control a behavior of at least one of said lights; a user input device communicating with said processor and configured to accept user input and to output information to said processor; a rectifier circuit communicating with a power signal and configured to form a rectified power waveform forming a sinusoidal waveform between zero crossings; and a bridge circuit communicating with said rectifier circuit and said processor and configured to receive the rectified power waveform and the command and address data, and to output a data encoded power signal to control said behavior of said lights, said data encoded power signal forming a sinusoidal waveform between zero crossings; wherein the bridge circuit includes a plurality of transistors, the plurality of transistors communicating with said processor to receive a control signal having first and second states, at least one of the plurality of transistors enabled when the control signal is in the first state and at least one of the others of the plurality of transistors enabled when the control signal is in the second state, the bridge circuit outputting said data encoded power signal responsive to the rectified power waveform having a higher polarity when the control signal is in the first state and responsive to the rectified power waveform having a lower polarity when the control signal is in the second state.