Exam Project - Led Dot Matrix (7x5)

Discussion in 'Homework Help' started by Thediabloman, Mar 11, 2008.

  1. Thediabloman

    Thread Starter Member

    Mar 11, 2008
    16
    0
    Hello Everyone:D

    I have just begun on my exam project, and would like a little guidance..
    I want to make a row of Dot Matrix's(7x5), where I can enter a text, and then see it scroll across the dot matrix's.

    I want a row of 1x10, and could really use some help, to the schematic, programming, and what parts to use.

    - Thediabloman -
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    We do help, but you need to understand that we don't do the work for you. It's your project - spend some time learning how the hardware works and how to make a message appear. From that, you should be able to see how to scroll it.

    Show us some work (schematics, program listings) and we'll try to help out.
     
  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Hold the partying, start the studying ;)
     
  4. Dave

    Retired Moderator

    Nov 17, 2003
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    If in doubt about what you include in such a post, please read the guide.

    Dave
     
  5. Thediabloman

    Thread Starter Member

    Mar 11, 2008
    16
    0
    I'm sorry if you got the impression that I wanted you to do it for me..

    My question was if I could get guidance.. I have printed almost 150 pages of text about LED-dot Matrixs, and I would just like to know what you would
    recommend?

    And actually I use all my free-time making a program in VB for this project.. No partying here my friends.. :D
     
  6. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Try with one LED at a time. You make it move by lighting the one next to it, and turning the original one off. Holding the row selection and moving the column select should work.

    Don't forget to understand the hardware requirements for driving the LED matrix. I would recommend that you select a LED matrix you like.

    How are you planning to interface the computer to the LED matrix?
     
  7. Thediabloman

    Thread Starter Member

    Mar 11, 2008
    16
    0
    So now I have connected 7 pins from my PIC to the LED matrix, through transistors, to control the rows. I then placed a 74HC to run through all the colloums, which is clocked by the PIC. So how does a sample of code look like here?
    If I want to make a dot go from one corner to another?

    Pin 1 high - Clock 74HC
    Pin 2 high - Clock 74HC and so on..

    How would this look in asm?
     
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