A method and apparatus are provided for operating a wall switch module using leakage current. In one embodiment, the wall switch module may be operable using leakage current. The wall switch control module may be provided to include a microcontroller, wireless receiver and triac. The wall switch control...http://www.google.es/patents/US7863777?utm_source=gb-gplus-sharePatente US7863777 - Low power switching circuit
