Fault tolerant electric current regulator

A fault tolerant regulating system for regulating the flow of electricity comprising:

• a plurality of light radiating circuits, each radiating circuit comprising first and second light sources for radiating first and second light signals, a first light sensor for receiving the first light signal and for generating a first light sensor output signal in response thereto, and a control circuit for pulsing only the first light source to radiate the first light signal for a first predetermined time each time the control circuit receives a control input signal and thereafter pulsing only the second light source to radiate the second light signal for the first predetermined time only as a consequence of the control circuit failing to receive the first light sensor output signal from the first light sensor within a second predetermined time after the control circuit has received the control input signal, wherein the first light source is pulsed subsequent to the control circuit failing to receive the first light sensor output signal after the first light source has been pulsed;
• a plurality of light controlled devices each connected for receiving the first and second light signals from the light radiating circuits and for regulating the flow of electricity through the light controlled devices;
• and
• a supervising controller connected to each light radiating circuit for providing the control input signal to each light radiating circuit and maintaining an operability status of each radiating circuit.