Arduino based RGB Matrix LED tester

This is a very simple Arduino project which control the 16x32 RGB LED Matrix Panel via an 16pin IDC cable. The Arduino will continuously sending 5 set colours (Red, Green, Blue, White, Black) to the LED Matrix Panel that allow the technician to find out which part of the LED Matrix Panel is malfunction.

Step 1: ?The story

Arduino based RGB Matrix LED tester

After completing the large LED screen project, my company always left out many bad 16x32 RGB LED Matrix Panel awaiting me to diagnose. I must light up all the LED Matrix in order to find out where is the actual problem

Step 2:

Arduino based RGB Matrix LED tester

Normally I have to use a computer plus a sending card & receiving card as shown in figure below to light up the LED, it is consuming power and very troublesome.

Step 3:

Arduino based RGB Matrix LED tester

By using an Arduino, I'm able to draw graphic such as Lines, Circles, Boxes and Bitmaps on the LED Matrix Panel without using an expensive computer & sending/receiving card.

Step 4: Materials

  • Arduino UNO, I'm using my own design Arduino
  • 16pin IDC cable and header connect between Arduino & RGB LED Matrix Panel
  • 5V 3a power supply to poewr the Arduino & RGB LED Matrix Panel
  • Power cable to connect between Arduino & RGB LED Matrix Panel
  • 1 x DC jack (Male)
  • 2 x DC jack (Female)

    Step 5: Source code and Downloads

    To control the RGB LED Matrix Panel, you need to include the Adafruit RGB Matrix Panel library which is available at GitHub. This is an Arduino library for 16x32 and 32x32 RGB LED matrix panels, you can get more information on how to use the library on the Adafruit web site.

    Here is the test code example for this project.

    #include // Core graphics library
    #include // Hardware-specific library
    #define CLK 8 // MUST be on PORTB!
    #define LAT A3
    #define OE 9
    #define A A0
    #define B A1
    #define C A2

    // Last parameter = 'false' disable double-buffering
    RGBmatrixPanel matrix(A, B, C, CLK, LAT, OE, false);

    void setup() {
    matrix.begin();
    }

    void loop() {
    // fill the screen with red
    matrix.fillRect(0, 0, 32, 16, matrix.Color333(7, 0, 0));
    delay(1000);

    // fill the screen with green
    matrix.fillRect(0, 0, 32, 16, matrix.Color333(0, 7, 0));
    delay(1000);

    // fill the screen with blue
    matrix.fillRect(0, 0, 32, 16, matrix.Color333(0, 0, 7));
    delay(1000);

    // fill the screen with white
    matrix.fillRect(0, 0, 32, 16, matrix.Color333(7, 7, 7));
    delay(1000);

    // fill the screen with black
    matrix.fillScreen(matrix.Color333(0, 0, 0));
    delay(1000);
    }

    Step 6: Connection between Arduino and RGB LED Matrix Panel

    Arduino based RGB Matrix LED tester

    This project is based on Arduino UNO/Duemilanove (ATMega328), however you can use it on Arduino Mega (ATmega2560) with some changes in the pin configuration.

    Step 7: Arduino PCB and Power Cable

    Arduino based RGB Matrix LED tester

    Here is my Arduino PCB design and power cable. The power cable is made for two different types of power connectors as shown.

    Step 8: Different types of power connectors

    Arduino based RGB Matrix LED tester

    Step 9: Top view of the Arduino PCB design

    Arduino based RGB Matrix LED tester

    Step 10: Bottom view of the PCB design

    Arduino based RGB Matrix LED tester

    Step 11: Previous design

    Arduino based RGB Matrix LED tester

    This is the previous PCB design where the IDC cable is solder directly on the PCB

    Step 12: Schematic for 16x32 RGB LED Matrix Panel

    Arduino based RGB Matrix LED tester

    This is the 16x32 RGB LED Matrix schematic, I get it from the China website.

    You can download a higher resolution schematic (PDF file) from my personal website
    http://www.ediy.com.my/index.php/projects/item/109...

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