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You are here: Home / Topics / problem in interfacing of 4 by 3keypad and LCD

problem in interfacing of 4 by 3keypad and LCD

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Microcontroller › 8051 › problem in interfacing of 4 by 3keypad and LCD

  • This topic has 6 replies, 7 voices, and was last updated 13 years, 5 months ago by nikhiljain.
Viewing 7 posts - 1 through 7 (of 7 total)
  • Author
    Posts
  • July 11, 2011 at 8:58 am #1080
    Pradip Chikani
    Participant

    Hello…sir

    I am doing my final year project on Interfacing of LCD & 4*3 Matrix keypad..but i cant read alphanumeric digits on LCD when i press any key….tell me i how it possible?…is there all the projects and Source codes are checked and worked?….all projects are running?….pls help me bcoz my submission is on 15th july….please sir help me immidiatly…

    July 20, 2011 at 9:42 am #6471
    ARPIT SONI
    Participant

    the codes are all checked and are working propely.even the comments are also written ther u shuld check whether the code is for avr or 8051.and check ur circuit 

    July 21, 2011 at 2:28 pm #6485
    dagakshay
    Participant

    hello Pradip,

    the codes and ckts are very proper…. if still that code is not working remove the pullup resistors from the input pins on the keypad… then try let me know it you get if you get it….

    July 22, 2011 at 5:14 pm #6493
    SaLMAN Ahmed Khan
    Participant

     

     

    i think u must wired the lcd on some other port istead of port0 

    January 2, 2012 at 5:58 pm #6982
    arj
    Participant

    hi

    i am facing a similar problem, i designed the circuit on proteus exactly as it was given on the site but the results are not right. can anyone plz give me a proteus design which could run the code given at the following link, properly

    http://www.engineersgarage.com/microcontroller/8051projects/interface-keypad-at89c51-circuit

    January 3, 2012 at 4:54 am #6983
    gantulga
    Participant

    hi are you online?

     

    January 4, 2012 at 10:15 am #6993
    nikhiljain
    Participant

    Hello,

     

    The proteus simulation may not work correclty everytime. You must try it out on hardware and troubleshoot the problems.

     

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