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You can create YOUR OWN SHAPE super easily

Published November 20, 2022 © GPL3+

YOUR OWN SHAPE - 8x8 LED Matrix Arduino

Create your own shape without effort on an 8x8 LED Matrix using the code provided(easy to follow)

BeginnerFull instructions provided10,110

Things used in this project

Hardware components

Arduino UNO

Jumper wires (generic)

Breadboard (generic)

LED Dot Matrix Display, Red

Story

This is a very easy project for starters - a continuity and improvement from the initial project Skull 8x8 LED matrix

The Matrix used in this project was a 1088bs led matrix

The idea is quite simple:

1. We have a row with the corresponding pin values

2. We have a column with the corresponding pin values

3. We have our matrix with 0 & 1 - 0 for LED OFF, 1 for LED ON

4. In the setup phase we set the pin mode and our pattern

5. Finally we display it

The code contains 3 shapes(heart, angry robot, and squares) - all shown in the main image of the project.

You can create YOUR OWN SHAPE super easily:

1. Copy-paste one of the existing matrixes e.g. angryRobot and change the LED values

2. Change the name of the matrix with your freshly created matrix here:

void setupMatrix(){
  ...
 bool v = yourNameHere[x][y];
 ...
  }

Note: Before wiring up the LED 8x8 matrix with the Arduino Uno, bear in mind that the pins are numbered as per the following:

1-8(left to right) -> side with the knob(picture below)

16-9(left to right) -> side without the knob

Code

CREATE YOUR OWN SHAPE 8x8 LED Matrix

// 2-dimensional array of row pin numbers:
const int row[8] = {
  2, 7, 19, 5, 13, 18, 12, 16
};

// 2-dimensional array of column pin numbers:
const int col[8] = {
  6, 11, 10, 3, 17, 4, 8, 9
};

// 2-dimensional array of pixels:
int pixels[8][8];

typedef bool charMapType[8][8];

const charMapType heart = {
  {0, 0, 0, 0, 0, 0, 0, 0},
  {0, 1, 1, 0, 0, 1, 1, 0},
  {1, 1, 1, 1, 1, 1, 1, 1},
  {1, 1, 1, 1, 1, 1, 1, 1},
  {0, 1, 1, 1, 1, 1, 1, 0},
  {0, 0, 1, 1, 1, 1, 0, 0},
  {0, 0, 0, 1, 1, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0}
};

// angry robot
// const charMapType angryRobot = {
//   {1, 1, 1, 1, 1, 1, 1, 1},
//   {1, 0, 1, 1, 1, 1, 0, 1},
//   {1, 0, 0, 1, 1, 0, 0, 1},
//   {1, 1, 1, 1, 1, 1, 1, 1},
//   {1, 1, 0, 1, 1, 0, 1, 1},
//   {1, 0, 0, 0, 0, 0, 0, 1},
//   {1, 1, 1, 0, 0, 1, 1, 1},
//   {1, 1, 1, 1, 1, 1, 1, 1}
// };

//squares
// const charMapType squares = {
//   {1, 1, 1, 1, 1, 1, 1, 1},
//   {1, 0, 0, 0, 0, 0, 0, 1},
//   {1, 0, 1, 1, 1, 1, 0, 1},
//   {1, 0, 1, 0, 0, 1, 0, 1},
//   {1, 0, 1, 0, 0, 1, 0, 1},
//   {1, 0, 1, 1, 1, 1, 0, 1},
//   {1, 0, 0, 0, 0, 0, 0, 1},
//   {1, 1, 1, 1, 1, 1, 1, 1}
// };

void setup() {
  for (int thisPin = 0; thisPin < 8; thisPin++) {
    pinMode(col[thisPin], OUTPUT);
    pinMode(row[thisPin], OUTPUT);
  }
  setupMatrix();
}

void loop() {
  displayLedPattern();
}

void displayLedPattern(){
  for (int thisRow = 0; thisRow < 8; thisRow++) {
    digitalWrite(row[thisRow], HIGH);
    for (int thisCol = 0; thisCol < 8; thisCol++) {
      // get the state of the current pixel;
      int thisPixel = pixels[thisRow][thisCol];
      // when the row is HIGH and the col is LOW,
      // the LED where they meet turns on:
      digitalWrite(col[thisCol], thisPixel);
      // turn the pixel off:
      if (thisPixel == LOW) {
        digitalWrite(col[thisCol], HIGH);
      }
    }
    // take the row pin low to turn off the whole row:
    digitalWrite(row[thisRow], LOW);
  }
}

void setupMatrix(){
  for (int x = 0; x < 8; x++) {
    for (int y = 0; y < 8; y++) {
      bool v = squares[x][y];
      if(v){
        pixels[x][y] = LOW;
      }else{
        pixels[x][y] = HIGH;
      }
    }
  }
}

Credits

pizzaislife

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YOUR OWN SHAPE - 8x8 LED Matrix Arduino

Things used in this project

Hardware components

Story

You can create YOUR OWN SHAPE super easily:

Schematics

8x8 LED Matrix

Code

CREATE YOUR OWN SHAPE 8x8 LED Matrix

Credits

pizzaislife

Comments

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YOUR OWN SHAPE - 8x8 LED Matrix Arduino

YOUR OWN SHAPE - 8x8 LED Matrix Arduino

Things used in this project

Hardware components

Story

You can create YOUR OWN SHAPE super easily:

Schematics

8x8 LED Matrix

Code

CREATE YOUR OWN SHAPE 8x8 LED Matrix

Credits

pizzaislife

Comments

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