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Opto isolator inpug ic1/12/2024 ![]() ![]() If we modify the value of resistance to lesser, then LED intensity will be high making the transistor gain high. ![]() The intensity of the LED can be controlled through the resistor ‘R1’. Once the switch is activated, then the 9V battery provides current toward the LED using the 10K resistor. The controlling of an IR LED can be done through the switch ‘S1’. In this circuit, an optocoupler-based low-cost phototransistor is utilized. In this circuit, an IC like PC817 is an essential component that is used to switch the DC circuit.Ī Photo-Transistor is used in the above optocoupler circuit, and this circuit works as a usual Transistor switch. The circuit diagram of the PC817 IC Optocoupler is shown below.
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