Calculatorīs LCD


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  1. #1
    Join Date
    Nov 2003
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    Sao Paulo - Brazil
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    Question No embeded controller LCD

    Hi Steve,

    youīre right about the Part#

    The problem is : I have a big box full of those 8 digits calculatorīs LCD (aprox 2000 units) with no Idīs, but I know they were origanlly designed for calculators.

    I did some comparisons with some other chinese calculators and the display pinout are practically the same, with some no relevant changes (pin spacing etc)

    What I would like to know is the main idea on how to drive a regular LCD with no embeded controller and if it is possible to be done with PicBasic.

    Thanks

    Sérgio

  2. #2
    Join Date
    Sep 2004
    Location
    montreal, canada
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    Regular LCD must have a regular frequency running on the backplane pin. HPWM can be used for that. Once you have a frequency on this pin, just try to find the according pinout.

    Basically it's not really different than to drive regular multiplexed 7 segment display

    and yes you can handle it under PBP, but it's maybe easier to use LCD driver IC for that depending on your programming skills.
    Steve

    It's not a bug, it's a random feature.
    There's no problem, only learning opportunities.

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