Self biased electrically isolated remote switch powered by an optical or acoustic coupling

An optical self biased isolated remote switch having a primary side electrically decoupled from a secondary side, the self biased isolated remote switch comprising:

• a first light emitting diode on the primary side responsive to a bias voltage;
• an array of detector diodes on the secondary side responsive to light emitted by said first light emitting diode for providing a current;
• a capacitor on the secondary side responsive to said current provided by said detector diodes, said capacitor storing charge;
• a second light emitting diode on the secondary side responsive to a voltage across said capacitor;
• and
• a detector diode on the primary side responsive to light emitted by said second light emitting diode for providing an electrical signal.

An acoustical self biased isolated remote switch having a primary side electrically decoupled from a secondary side, the self biased isolated remote switch comprising:

• an oscillator on the primary side responsive to a bias voltage;
• a first piezo-electric transducer on the primary side responsive to a signal provided by said oscillator, said first piezo-electric transducer generating a mechanical vibration;
• an acoustic medium for acoustically coupling the primary side to the secondary side, said acoustic medium being responsive to said mechanical vibration provided by said first piezo-electric transducer;
• a second piezo-electric transducer on the secondary side responsive to said mechanical vibration transmitted through said acoustic medium, said second piezo-electric transducer providing acoustical feedback;
• and
• a load on the primary side responsive to said acoustical feedback from said second piezo-electric transducer for generating a voltage signal.