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AC voltage monitor circuit

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    AC voltage monitor circuit

    OK, let me post this in the right place this time

    Before I reinvent the wheel, anyone know of a good 120/230VAC optoisolator/transformer board that outputs a linear AC/DC voltage in the 3.3 VAC/DC range? I need to measure the AC coming from my generators into a ESP32 board using Arduino.

    Thanks,
    Z
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