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0:11
YouTube
Electronics Education
Galvanic isolation using Optocoupler: Electrical Isolation between input and output circuits
This diagram shows how an optocoupler provides galvanic isolation between two circuits. When the input switch is open, the LED inside the optocoupler is off and no light reaches the transistor, so the output side remains off. When the switch is closed, the LED turns on and its light activates the transistor on the isolated side, allowing ...
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