Lcd AG-16080B consuming too much current ?

Discussion in 'Embedded Systems and Microcontrollers' started by arry, Apr 8, 2010.

  1. arry

    Thread Starter New Member

    Apr 2, 2010
  2. retched

    AAC Fanatic!

    Dec 5, 2009
    I would try canging the voltage regulator. Do you have another you can try? Also Are you sure the voltage regulator is wired and heatsunk properly?

    Do you have a schematic for this circuit?
  3. arry

    Thread Starter New Member

    Apr 2, 2010
    Hi, thanks for the idea.

    I am using a dev-board with pic18f4550 and a voltage regulator on it.
    Here is the schematic:

    According to specs the lcd should not draw more than 5mA, but instead it
    draws 12mA through its Vdd and Vss pins. The other pins hardly consume
    any current.

    I connected a resistor 10k in series to Vss and a defect that was showing before
    disappeared but the lcd still did not work. The defect is that sometimes
    vertical lines are shown on power on reset.

    Also the writing and reading into the ram of the lcd sometimes works
    sometimes it does not.

    Could I have burned the lcd when I was measuring with a multimeter
    the resistance between the lcd pins ?