Negative voltage for LCD driving?

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  1. - 10th January 2009, 10:20 #5
    Samoele's Avatar
    Samoele
    Samoele is offline Junior Member
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    Hi,

    3 pin on LCD is normally tied to GND. negative supply is need by extrem contrast or low temperatures.

    You can help with PWM from PIC. see Attachment


    Samo
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