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need help in 8 bit moving message display using Matrix LEDs

Discussion in 'Microcontrollers, Programming and IoT' started by jon.leaves, Oct 5, 2009.

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  1. jon.leaves

    jon.leaves

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    Oct 5, 2009
    Hi to everyone... I am new here...

    I am working on "8 bit moving message display using Matrix LEDs"

    I am just making a prototype.

    Please guide me for this circuit....

    Thanks in advance.
     
  2. rushi53

    rushi53

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    0
    Aug 19, 2009
    Last edited: Oct 7, 2009
  3. jon.leaves

    jon.leaves

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    0
    Oct 5, 2009
    I have not yet finalized the circuit diagram... I am not familiar with microcontroller programming... Can you tell me if this circuit is cost effective. and have u done programming in C or assembly... because I am very poor in C language.
     
  4. rushi53

    rushi53

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    Aug 19, 2009
    I have used 89s51 microcontroller and have done programming in assembly language.
     
  5. jon.leaves

    jon.leaves

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    Oct 5, 2009
    How many characters have you designed? I mean 5x7 matrix belongs to 1 character...
    Thus how many matrices are there ?
    and whats the use of Latch and decoder ICs ?
     
  6. rushi53

    rushi53

    10
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    Aug 19, 2009
    Decoder IC is used to select 1 column of Matrix LED.
    and Latch IC is used to hold the data at each column.
    I have used 2 ports for decoders and 2 decoders at each port
    thus total 4 decoders
    each decoder have 8 outputs
    thus total 32 outputs from decoder
    and each character requires 5 columns,
    thus I was able to use 6 characters.

    you can use 4:16 decoder, if you want to use more characters.
    Thus u can increase columns.
     
  7. jon.leaves

    jon.leaves

    5
    0
    Oct 5, 2009
    @rushi53,

    thanks for the information
    I can now start working on the circuit diagram...

    can you tell me what is the programming logic in this
    I mean algorithm/flowchart?
     
    Last edited: Oct 8, 2009
  8. powerpisces

    powerpisces

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    Oct 20, 2011
    i need some help to drive dot matrix with out using micro controller.

    i need some help to drive led dot matrix without using micro controller. i have designed a digital clock circuit on 7 segment, now i want to implement it now matrix. plz help me. i m 2nd year student so i haven't any brief idea about micro controller and i must implement my circuit on led matrix.
     
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