100 LED (width) X 100 LED (Height) matrix

Discussion in 'The Projects Forum' started by Andreas San juan, Dec 3, 2015.

  1. Andreas San juan

    Thread Starter New Member

    Dec 3, 2015
    4
    0
    Hi
    I have a question , please to help.


    HardWare : I have LED matrix (100 LED ( width) X 100 LED (height))
    SoftWare: on hard disk I have many random size colored images files and using vb.net I’m able to converted any of these images into an image file of black and white pixels only - why ? in order to send this image into the LED matrix, the final image size after conversion is always ( 100 pixel width X 100 pixel height), I did image processing to convert any image on harddisk into 100 pixel X 100 pixel to send it to the LED matrix.

    what I need to do is to send this image file of black and white dots into the corresponding LED and make this image scroll down on the LED matrix. for example pixel (0,0) should be sent to LED(0,0) and make it ON -if pixel is WHITE or OFF-if pixel is BLACK, pixel(1,0) should be sent to LED(1,0) until I reach pixel ( 100,100) should be sent to LED(100,100)

    I need a method either parallel or serial to send these pixels(either black which is 0 or white which is 1 ) to its corresponding LED to make it ON or OFF , also I need to crawl down the image , what I mean I need this image to move from up of the LED matrix and crawl down to the end of the LED matrix.
    I have uploaded some images for explanation.
    1-how I can do the interface , parallel or serial ?

    2- how I can control the speed of crawling ?

    3-i need a fast interface method ( the rastering should be very fast )


    would you please give ideas .


    Thanks a lot
     
  2. Colin55

    Member

    Aug 27, 2015
    191
    19
    This is far too complex for a beginner.
     
    GopherT and absf like this.
  3. absf

    Senior Member

    Dec 29, 2010
    1,492
    372
  4. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,031
    3,802
    Do you have the 100 x 100 LED panel?

    Or, do you plan to build it yourself?

    If you have it, what is the model number and datasheet?
     
  5. Andreas San juan

    Thread Starter New Member

    Dec 3, 2015
    4
    0
    ***********************************
    no , I don't have the 100x100 LED , but I do tests on 100 I have , but once I can solve the interface issue ( 10000 LED is cheap from ebay)
     
  6. Andreas San juan

    Thread Starter New Member

    Dec 3, 2015
    4
    0
     
  7. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,031
    3,802

    Do you plan to turn them on as a raster (one at a time) like a TV does nor latched? Were you hoping to be able to scroll your images or will it be a "slide show" with a fixed image?

    You have several hurdles.

    10,000 LEDs means 20,000 connections for LEDs.
    If you want to control them individually, then you will have another 20,000 connections for current limiting resistors and at least another 10,000 for connections to a chip (chips) and several sets of hierarchical chips to control those 10,000 pins.

    If you want to multiplex, then you have issues with transistors and so on - figure another 40,000 solder joints.

    It seems like 10,000 LEDs is workable but, in the end, a really lot of work for a low resolution picture of an apple.

    On top of that, you will have a lot of current to supply 10000 LEDs, even if running at 1mA each. Running them in series is also difficult (impossible?) if trying to make a programmable picture instead of a fixed picture. This is a big project.
     
    absf and cmartinez like this.
  8. Andreas San juan

    Thread Starter New Member

    Dec 3, 2015
    4
    0
    ***I agree with you, but I was looking for the easiest interface method, but if it is hard I will leave it.
     
  9. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,031
    3,802

    Here is an example using less than 25% of what you want to do...

    Drag the movie slider to 2:40 when you start. That is where the fun begins. Sorry, that is where the work begins.

     
    absf and cmartinez like this.
Loading...