Arduino LED matrix tutorial 1:
Hi guys welcome to meworkstelugu in this article we learn about the LED matrix . the LED matrix has different types .here we learn about 8x8 LED matrix .
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| 8x8 LED matrix |
This 8x8 LED matrix is connected with MAX7219 IC . this 8x8 LED matrix has 5 pins there are
1.VCC
2.GND
3.DIN
4.CS
5.CLK
this pins available on both sides of 8x8 LED matrix why because we connect on 8x8 LED matrix to other than it become 8x16 LED matrix .
Components :
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circuit diagram:
We can control every LED individually on this 8x8 LED matrix.see the below video to understand about this
Arduino LED matrix program :
//We always have to include the library
#include "LedControl.h"
/*
Now we need a LedControl to work with.
***** These pin numbers will probably not work with your hardware *****
pin 11 is connected to the DataIn
pin 13 is connected to the CLK
pin 3 is connected to LOAD
We have only a single MAX72XX.
*/
LedControl lc=LedControl(11,13,3,1);
/* we always wait a bit between updates of the display */
unsigned long delaytime=100;
void setup() {
/*
The MAX72XX is in power-saving mode on startup,
we have to do a wakeup call
*/
lc.shutdown(0,false);
/* Set the brightness to a medium values */
lc.setIntensity(0,8);
/* and clear the display */
lc.clearDisplay(0);
}
/*
This method will display the characters for the
word "Arduino" one after the other on the matrix.
(you need at least 5x7 leds to see the whole chars)
*/
void writeArduinoOnMatrix() {
/* here is the data for the characters */
byte a[5]={B01111110,B10001000,B10001000,B10001000,B01111110};
byte r[5]={B00111110,B00010000,B00100000,B00100000,B00010000};
byte d[5]={B00011100,B00100010,B00100010,B00010010,B11111110};
byte u[5]={B00111100,B00000010,B00000010,B00000100,B00111110};
byte i[5]={B00000000,B00100010,B10111110,B00000010,B00000000};
byte n[5]={B00111110,B00010000,B00100000,B00100000,B00011110};
byte o[5]={B00011100,B00100010,B00100010,B00100010,B00011100};
/* now display them one by one with a small delay */
lc.setRow(0,0,a[0]);
lc.setRow(0,1,a[1]);
lc.setRow(0,2,a[2]);
lc.setRow(0,3,a[3]);
lc.setRow(0,4,a[4]);
delay(delaytime);
lc.setRow(0,0,r[0]);
lc.setRow(0,1,r[1]);
lc.setRow(0,2,r[2]);
lc.setRow(0,3,r[3]);
lc.setRow(0,4,r[4]);
delay(delaytime);
lc.setRow(0,0,d[0]);
lc.setRow(0,1,d[1]);
lc.setRow(0,2,d[2]);
lc.setRow(0,3,d[3]);
lc.setRow(0,4,d[4]);
delay(delaytime);
lc.setRow(0,0,u[0]);
lc.setRow(0,1,u[1]);
lc.setRow(0,2,u[2]);
lc.setRow(0,3,u[3]);
lc.setRow(0,4,u[4]);
delay(delaytime);
lc.setRow(0,0,i[0]);
lc.setRow(0,1,i[1]);
lc.setRow(0,2,i[2]);
lc.setRow(0,3,i[3]);
lc.setRow(0,4,i[4]);
delay(delaytime);
lc.setRow(0,0,n[0]);
lc.setRow(0,1,n[1]);
lc.setRow(0,2,n[2]);
lc.setRow(0,3,n[3]);
lc.setRow(0,4,n[4]);
delay(delaytime);
lc.setRow(0,0,o[0]);
lc.setRow(0,1,o[1]);
lc.setRow(0,2,o[2]);
lc.setRow(0,3,o[3]);
lc.setRow(0,4,o[4]);
delay(delaytime);
lc.setRow(0,0,0);
lc.setRow(0,1,0);
lc.setRow(0,2,0);
lc.setRow(0,3,0);
lc.setRow(0,4,0);
delay(delaytime);
}
/*
This function lights up a some Leds in a row.
The pattern will be repeated on every row.
The pattern will blink along with the row-number.
row number 4 (index==3) will blink 4 times etc.
*/
void rows() {
for(int row=0;row<8;row++) {
delay(delaytime);
lc.setRow(0,row,B10100000);
delay(delaytime);
lc.setRow(0,row,(byte)0);
for(int i=0;i<row;i++) {
delay(delaytime);
lc.setRow(0,row,B10100000);
delay(delaytime);
lc.setRow(0,row,(byte)0);
}
}
}
/*
This function lights up a some Leds in a column.
The pattern will be repeated on every column.
The pattern will blink along with the column-number.
column number 4 (index==3) will blink 4 times etc.
*/
void columns() {
for(int col=0;col<8;col++) {
delay(delaytime);
lc.setColumn(0,col,B10100000);
delay(delaytime);
lc.setColumn(0,col,(byte)0);
for(int i=0;i<col;i++) {
delay(delaytime);
lc.setColumn(0,col,B10100000);
delay(delaytime);
lc.setColumn(0,col,(byte)0);
}
}
}
/*
This function will light up every Led on the matrix.
The led will blink along with the row-number.
row number 4 (index==3) will blink 4 times etc.
*/
void single() {
for(int row=0;row<8;row++) {
for(int col=0;col<8;col++) {
delay(delaytime);
lc.setLed(0,row,col,true);
delay(delaytime);
for(int i=0;i<col;i++) {
lc.setLed(0,row,col,false);
delay(delaytime);
lc.setLed(0,row,col,true);
delay(delaytime);
}
}
}
}
void loop() {
writeArduinoOnMatrix();
rows();
columns();
single();
}
Arduino LED matrix tutorial 2:
Now we know about how to map bits on this LED matrix .watch the below video carefully get batter understand regarding to thisbits map on LED matrix.
Arduino LED matrix tutorial 3:
program 1:
// Including the required Arduino libraries
#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
// Uncomment according to your hardware type
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
//#define HARDWARE_TYPE MD_MAX72XX::GENERIC_HW
// Defining size, and output pins
#define MAX_DEVICES 4
#define CS_PIN 3
// Create a new instance of the MD_Parola class with hardware SPI connection
MD_Parola myDisplay = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
void setup() {
// Intialize the object
myDisplay.begin();
// Set the intensity (brightness) of the display (0-15)
myDisplay.setIntensity(0);
// Clear the display
myDisplay.displayClear();
}
void loop() {
myDisplay.setTextAlignment(PA_LEFT);
myDisplay.print("");
delay(2000);
myDisplay.setTextAlignment(PA_CENTER);
myDisplay.print("C");
delay(2000);
myDisplay.setTextAlignment(PA_RIGHT);
myDisplay.print("R");
delay(2000);
myDisplay.setTextAlignment(PA_CENTER);
myDisplay.setInvert(true);
myDisplay.print("I");
delay(2000);
myDisplay.setInvert(false);
myDisplay.print(1234);
delay(2000);
}
program 2:
// Including the required Arduino libraries
#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
// Uncomment according to your hardware type
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
//#define HARDWARE_TYPE MD_MAX72XX::GENERIC_HW
// Defining size, and output pins
#define MAX_DEVICES 4
#define CS_PIN 3
// Create a new instance of the MD_Parola class with hardware SPI connection
MD_Parola myDisplay = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
void setup() {
// Intialize the object
myDisplay.begin();
// Set the intensity (brightness) of the display (0-15)
myDisplay.setIntensity(0);
// Clear the display
myDisplay.displayClear();
myDisplay.displayScroll("Hello", PA_CENTER, PA_SCROLL_LEFT, 100);
}
void loop() {
if (myDisplay.displayAnimate()) {
myDisplay.displayReset();
}
}
if you have any doubts regarding to this project, contact me on Instagram or comment on YouTube video. I will help my best.
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