Traffic light and back-up traffic controller

Apparatus for operating a traffic control having a plurality of lights, said apparatus comprising:

• variable timer means for generating time interval signals having a timing sequence for controlling said plurality of lights, and
• timer capacitor means operatively connected to said variable timer means for holding an electrical charge whose rates of discharge determines the time intervals generated by said variable timer means, and
• timer resistor array for varying a resistance-capacitance constant of a discharge path of said timer capacitor means, comprising timer resistor means, said timer resistor means being sequentially connected to said timer capacitor means for providing said rates of discharge, and
• coupling array for sequentially connecting said timer capacitor means with said timer resistor means of said timer resistor means array, and
• rectifier bridge array for supplying direct current to said coupling array comprising rectifier bridge means, said rectifier bridge means being operatively interposed between said timer capacitor means and said timer resistor array for obtaining a unidirectional current flow in said coupling array, and
• sequencing register means for sequentially selecting a particular coupling within said coupling array, said sequencing register means being responsive to said variable timer means.