graph TD;
    A[Input LED] -->|1: ANODE| B(LED);
    B -->|2: CATHODE| C;

    subgraph Opto-isolator $MOC3021$
        direction TB
        B
        D[Photodetector Triac Driver] -->|4, 6: MAIN_TERM| E[Output Triac]
    end

    C --> D;

    E --> F(Output);

• Input LED: Controls the opto-isolator, allowing an electrical signal to control the device.
• Photodetector Triac Driver: The key component inside the MOC3021 that transmits the input signal to the output, isolating the input from the output.
• Output Triac: Controls the external circuit or device based on the input received through the enabled LED.

• Q1: Un triac con número de parte BT139-600E,127.
• D1: Un diodo con número de parte DB3.
• U2: Un potenciómetro digital AD5290YRMZ100-R7.
• U1: Un optoacoplador MOC3021.
• R1: Una resistencia cuyo valor no se ha especificado.
• RV1: Un potenciómetro variable de 100kΩ.
• C1: Un condensador cuyo valor no se ha especificado.