Electric circuit control system using exclusive {37 or{38 {0 gate

摘要

A circuit is disclosed which is suitable for controlling lighting in a building from a multiple number of points. AC current to light bulbs is controlled by a triac which in turn is controlled by the output of a series of exclusive OR gates. The output of each exclusive OR gate is connected to one input of an adjacent exclusive OR gate except that the output of the last exclusive OR gate of the series is connected to control the input to the triac. Switches connecting to the remaining inputs of each of the exclusive OR gates each can independently determine energization or de-energization of the light bulbs.