Arduino Uno R4 LED Matrix

Introduction

This is the Arduino Uno R4 LED Display. A versitile multi use display built around the Arduino Uno R4 and the FC16 MAX7219 Matrix display.

Parts needed	Quantity
Arduino Uno R4	1
FC16 MAX7219 LED Matrix	1
Jumper wires	5
M3 - 0.5 x 16mm machine screws	6
M3 - 0.5 hex nut	6

 

Assembly

1	Print all parts.
2	Slot a nut into each of the slots on the front of the 3D printed base.
3	Slide the Arduino into the lower slot on the base.
4	Add wires to each of the five pins on the FC16.
5	Connect the wires to the Uno as indicated below.

FC16	Arduino Uno R4
VCC	5V
GND	GND
DIN	D11
CS	D8
CLK	D13

6	Screw the FC16 onto the diffuser with the bracket, four screws, and four nuts.
7	Slide the FC16/diffuser part into the upper slot on the base.
8	Screw the Lid on with two more screws to secure everything inside.
9	Upload example code to test it or make your own.
10	Enjoy!

#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES 4
#define CS_PIN 8
byte counter = 0;
char counterChar[4] = {0};
MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
void setup(void)
{
  P.begin();
  P.print("Hello!");
  delay(4000);
  P.displayText("I am the Arduino Uno R4 LED Matrix", PA_CENTER, 50, 0, PA_SCROLL_LEFT, PA_SCROLL_LEFT);
}
void loop(void)
{
  if(P.displayAnimate()){
    counter++;
    sprintf(counterChar, "%d", counter);
    P.displayText(counterChar, PA_CENTER, 20, 0, PA_SCROLL_LEFT, PA_SCROLL_LEFT);
    }
}

Notes.

Feel free to modify files however you like and make this project your own! You can use it just as a starting point to make something much larger :)