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  1. A

    Constrictor VTL5C10

    That is the point, I don't know the polarity of the board, where the led + should be soldered. I know the LDR doesn't have polarity, I know the polarity and which leg is positive on the lead but I don't know the polarity of the PCB. Doesn't has marking and both are square. Thanks either way :/
  2. A

    Constrictor VTL5C10

    Hi, Does anyone know what is the polarity of the optocoupler on the led side?
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