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You are here: Home / Topics / weird problem with16X2 lcd?

weird problem with16X2 lcd?

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Microcontroller › 8051 › weird problem with16X2 lcd?

  • This topic has 6 replies, 5 voices, and was last updated 12 years, 9 months ago by chitra.
Viewing 7 posts - 1 through 7 (of 7 total)
  • Author
    Posts
  • July 21, 2012 at 5:43 am #1886
    Eli
    Participant

    guys i followed ur tutorial on interfacing 16×2 LCD with 8051.im facing a very weird problem where in  i see differrent characters after each reset 

    all the connection are same as in the tutorial but im using AT89s52 and i grounded the contrast pin this the only difference is muc defective or my LCD 

    please help guys im frustrated here

    July 21, 2012 at 12:02 pm #8299
    Mrunal Ahirrao
    Participant

    Don’t Worry! There won’t be any problem in MCU but may be in LCD! try changing LCD. Or follow the link below:http://lcd-linux.sourceforge.net/pdfdocs/lcd1.pdf and http://lcd-linux.sourceforge.net/pdfdocs/lcd2.pdf. here are tutorial on checking LCD.

     

    July 21, 2012 at 2:02 pm #8301
    AJISH ALFRED
    Participant

     

    Please post the link where you find the tutorial.

    July 21, 2012 at 2:26 pm #8302
    Eli
    Participant

    http://www.engineersgarage.com/microcontroller/8051projects/interface-lcd-at89c51-circuit this is the tutorial where A is to be displayed on the lcd.In my case  sometimes A is displayed while sometimes C and also after displaying characters it disappears

    August 5, 2012 at 7:02 am #8397
    Eli
    Participant

    guys i have been successful in display the character A but it stays for a second only

     

    August 10, 2012 at 6:39 am #8433
    Amrith
    Participant

    Hi eli,

    You might be clearing LCD after dispalying the character.Do not clear the LCD unless you want to display other character.

    August 10, 2012 at 8:17 am #8434
    chitra
    Participant

    hi Eli

    i had this problem once.there was problem in my s/w delay.

    check out it. and there should be very ltl delay while switching betn enable pin. 

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