HS-F13A 8x8 Dot Matrix Display

1. Introduction

The 8*8 dot matrix module is driven by MAX7219, which is an integrated serial input/output display driver, only 3 IO ports are needed to drive 1 dot matrix, the dot matrix display has no flicker and supports cascading,The 8x8 dot matrix module is driven by Max7219, which uses three-wire serial communication. When receiving Arduino data, it stores the data in the internal 8x8 bit static RAM of the chip, and then controls the high and low levels of each pin of the 8x8 dot matrix module through Max7219 to achieve the display purpose.

2. Schematic

8X8 dot matrix display-HS-F13A schematicClick to view

Module Parameters

• Power Supply Voltage: 3.3V / 5V

• Connection Type: 2.54mm Header

• Installation Method: Double Screw Fixed

4, Circuit Board Size

5 of Arduino IDE example program

Attention: If prompted with an error message about the library file during program upload, please import the library file first!
Arduino IDE Library Download and Import Tutorial:Click to view

Example program (UNO development board):

#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Max72xxPanel.h>

Max72xxPanel myMatrix = Max72xxPanel(9,1,1);
uint8_t  LEDArray[8];

const uint8_t LedArray1[8] PROGMEM ={0x00,0x18,0x24,0x00,0x00,0xa5,0x42,0x00};
const uint8_t LedArray2[8] PROGMEM ={0x00,0x24,0x18,0x00,0x00,0x24,0xc3,0x00};

void setup(){
  myMatrix.setRotation(0,3);
  myMatrix.fillScreen(0);
  myMatrix.write();
}

void loop(){
  //MAX7219上显示笑脸和哭脸各1秒

  memcpy_P(&LEDArray, &LedArray1, 8);
  for(int index_i=0; index_i<8; index_i++)
  {
    for(int index_j=0*8; index_j<0*8+8; index_j++)
    {
      if((LEDArray[index_i]&0x01)>0)
        myMatrix.drawPixel(index_j, 7-index_i,1);
      else
        myMatrix.drawPixel(index_j, 7-index_i,0);
      LEDArray[index_i] = LEDArray[index_i]>>1;
    }
  }
  myMatrix.write();
  delay(1000);
  memcpy_P(&LEDArray, &LedArray2, 8);
  for(int index_i=0; index_i<8; index_i++)
  {
    for(int index_j=0*8; index_j<0*8+8; index_j++)
    {
      if((LEDArray[index_i]&0x01)>0)
        myMatrix.drawPixel(index_j, 7-index_i,1);
      else
        myMatrix.drawPixel(index_j, 7-index_i,0);
      LEDArray[index_i] = LEDArray[index_i]>>1;
    }
  }
  myMatrix.write();
  delay(1000);

}

6, ESP32 Python Example (for Mixly IDE/Misashi)

Choose the development board Python ESP32 [ESP32 Generic(4MB)] and upload in code mode

Attention: If prompted with an error message about the library file during program upload, please import the library file first!
Download and import tutorial for Mixly IDE ESP32 library:Click to view

Example program (ESP32-Python):

import machine
import time

def write_byte(data):
    CS.value(0)
    for i in range(0, 8, 1):
        CLK.value(0)
        if ((data<<i)&0x80) == 0:
            DIN.value(0)
        else:
            DIN.value(1)
        CLK.value(1)

def write_data(addr, data):
    CS.value(0)
    write_byte(addr)
    write_byte(data)
    time.sleep_us(5)
    CS.value(1)

def Picture_display(Picture):
    for i in range(0, 8, 1):
        write_data(i + 1, Picture[i])



CLK = machine.Pin(18, machine.Pin.OUT)
CS = machine.Pin(5, machine.Pin.OUT)
DIN = machine.Pin(23, machine.Pin.OUT)
smiley = [0x00, 0x42, 0xA5, 0x00, 0x00, 0x24, 0x18, 0x00]
Crying_face = [0x00, 0xC3, 0x24, 0x00, 0x00, 0x18, 0x24, 0x00]
while True:
    Picture_display(smiley)
    time.sleep(1)
    Picture_display(Crying_face)
    time.sleep(1)

7, Mixly example program (graphical language)

Example program (UNO development board):Click to download
Attention: If prompted with an error message about the library file during program upload, please import the library file first!
Download and import tutorial of Mixly IDE Arduino library:Click to view

Example Program (ESP32 Development Board):Click to download
Attention: If prompted with an error message about the library file during program upload, please import the library file first!
Download and import tutorial for Mixly IDE ESP32 library:Click to view

8. Setting up the Test Environment

Arduino UNO Test Environment Setup

Prepare Components:

• HELLO STEM UNO R3 PRO DEVELOPMENT BOARD *1

• HELLO STEM UNO R3 P Expansion Board *1

• USB TYPE-C DATA CABLE *1

• 8X8 dot matrix display (HS-F13A) *1

• PH2.0 5P connector to Dupont wire *1

Circuit wiring diagram:

ESP32 Test Environment Setup

Prepare Components:

• ESP32EA MOC development board *1

• ESP32-EXP1 Expansion Board *1

• USB TYPE-C DATA CABLE *1

• 8X8 dot matrix display (HS-F13A) *1

• PH2.0 5P connector to Dupont wire *1

Circuit wiring diagram:Pending update...

9, Video tutorial

Video tutorial:Click to view

10, Test results

Arduino UNO test results:

After the device is connected to the wire, burn the above program to the development board, press the reset button, and you will see the matrix display smiling and crying faces in a loop.

ESP32 Test Results:

Pending update...