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Thread: [queued] LED matrix control with Teensy 4.0

  1. #1
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    [queued] LED matrix control with Teensy 4.0

    LED matrix control with Teensy 4.0

    https://github.com/ArminRehberger/LE...ith-Teensy-4.0

    Video:
    https://www.youtube.com/watch?v=ZAkksoPda_Q

    Functional description:
    FunctionDescriptionLEDMatrix_V1_00.pdf
    FunctionDescriptionLED.pdf

    Implementation of a LED matrix control. Four LED-Matrix with each 8x32 pixel Each matrix with 256 pixels, all together 1024 pixel.

  2. #2
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    Hi Armin, very nice.
    Can you tell me if you did a special power supply for the LEDs ? I read somewhere that USB was _not_ the way to power them, nor via the teensy. What's your experience ?

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    Quote Originally Posted by tochinet View Post
    Hi Armin, very nice.
    Can you tell me if you did a special power supply for the LEDs ? I read somewhere that USB was _not_ the way to power them, nor via the teensy. What's your experience ?
    Hello,
    I used four LED-Matrix with each 8x32 LEDs.
    Each matrix with 256 LEDs, all together 1024 LEDs (256LED * 4 stripes).

    Used voltage: 5V
    Per LED max. 60mA
    1024LEDs * 60mA = 61.4A

    I used two 5V 40A 200W power supplys for my four LED matrix.

    Max. power supply via USB:
    USB 1.0/1.1 5 V 0,1 A 0,5 W
    USB 2.0 5 V 0,5 A 2,5 W
    USB 3.0/3.1 (Gen1) 5 V 0,9 A 4,5 W
    USB 3.1 (Gen2) 5 V 3 A 15 W

  4. #4
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    What version of KiCad are you using? I tried versions 5.1.9 and 6.0 Neither can open your schematic...

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    Quote Originally Posted by Derek View Post
    What version of KiCad are you using? I tried versions 5.1.9 and 6.0 Neither can open your schematic...
    I use the KiCAD version 6.09.
    I downloaded the files from github and I could open the schematic.
    You need to open the file LEDMatrix.kicad_sch
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  6. #6
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    Wiring it all up

    Question about how you wired it all up. Is the attached diagram correct? Also, what are the center wires on the matrices for?
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  7. #7
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    KICAD files corrupted in download

    Quote Originally Posted by Armin Rehberger View Post
    I use the KiCAD version 6.09.
    I downloaded the files from github and I could open the schematic.
    You need to open the file LEDMatrix.kicad_sch
    I downloaded them again and they worked.

    I have another question...see additional post.

    Thanks!

  8. #8
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    Quote Originally Posted by Derek View Post
    I downloaded them again and they worked.

    I have another question...see additional post.

    Thanks!


    Hello Derek,
    I used these pins to control the matrixes, this match with my example program. When you use the same it should work:
    7 LED matrix 1 (Output)
    6 LED matrix 2 (Output)
    5 LED matrix 3 (Output)
    4 LED matrix 4 (Output)

    You should bridge the -V pins of your two power supplies.

    The additional wires on the matrixes are for:
    1. Put another power supply to it (the two wires red/black), you don't need
    2. Put matrixes in series together (the wires with the plug), you don't need.

    Hope your matrix work now.
    Kind regards Armin

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