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Dot Matrix 8×8 Red LED Module MAX7219

65.00 EGP

Led Matrix 8?8

SKU: Dot8*8Mod Categories: ,

Features:

  • A single module can drive an 8 x 8 common cathode lattice
  • With four 3mm screw?holes
  • Module with input and output interface, supports multiple modules cascade

Specifications:

  • Working Voltage: 5V DC
  • Size: 5cm(L) X 3.2cm(W) X 1.5cm(H)
  • Connect Dot Matrix to Arduino


    The program was based on the?basic Arduino?book, author?Michael McRoberts,?with minor changes and adaptations. Load the program in Arduino changing the message lines, as indicated by the program to display the information you want:

    // Program: horizontal Scrool with LED matrix 8x8
    // Arduino and Co.
    ? ?
    #include <pgmspace.h> ?
    #include <TimerOne.h> ?
    ? ?
    int DataPin = 4; ?// Connect DIN to pin 4
    int ClockPin = 5; // Connect CLK to pin 5
    int LoadPin = 6; ?// Connect CS/Load to pin 6
    ??
    byte buffer[8]; ?
    ? ?
    static byte font[][8] PROGMEM = { ?
    {B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000}, ??
    {B00000100, B00000100, B00000100, B00000100, B00000100, B00000100, B00000000, B00000100}, ??
    {B00001010, B00001010, B00001010, B00000000, B00000000, B00000000, B00000000, B00000000}, ??
    {B00000000, B00001010, B00011111, B00001010, B00011111, B00001010, B00011111, B00001010}, ??
    {B00000111, B00001100, B00010100, B00001100, B00000110, B00000101, B00000110, B00011100}, ??
    {B00011001, B00011010, B00000010, B00000100, B00000100, B00001000, B00001011, B00010011}, ??
    {B00000110, B00001010, B00010010, B00010100, B00001001, B00010110, B00010110, B00001001}, ??
    {B00000100, B00000100, B00000100, B00000000, B00000000, B00000000, B00000000, B00000000}, ??
    {B00000010, B00000100, B00001000, B00001000, B00001000, B00001000, B00000100, B00000010}, ??
    {B00001000, B00000100, B00000010, B00000010, B00000010, B00000010, B00000100, B00001000}, ??
    {B00010101, B00001110, B00011111, B00001110, B00010101, B00000000, B00000000, B00000000}, ??
    {B00000000, B00000000, B00000100, B00000100, B00011111, B00000100, B00000100, B00000000}, ??
    {B00000000, B00000000, B00000000, B00000000, B00000000, B00000110, B00000100, B00001000}, ??
    {B00000000, B00000000, B00000000, B00000000, B00001110, B00000000, B00000000, B00000000}, ??
    {B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000100}, ??
    {B00000001, B00000010, B00000010, B00000100, B00000100, B00001000, B00001000, B00010000}, ??
    {B00001110, B00010001, B00010011, B00010001, B00010101, B00010001, B00011001, B00001110}, ??
    {B00000100, B00001100, B00010100, B00000100, B00000100, B00000100, B00000100, B00011111}, ??
    {B00001110, B00010001, B00010001, B00000010, B00000100, B00001000, B00010000, B00011111}, ??
    {B00001110, B00010001, B00000001, B00001110, B00000001, B00000001, B00010001, B00001110}, ??
    {B00010000, B00010000, B00010100, B00010100, B00011111, B00000100, B00000100, B00000100}, ??
    {B00011111, B00010000, B00010000, B00011110, B00000001, B00000001, B00000001, B00011110}, ??
    {B00000111, B00001000, B00010000, B00011110, B00010001, B00010001, B00010001, B00001110}, ??
    {B00011111, B00000001, B00000001, B00000001, B00000010, B00000100, B00001000, B00010000}, ??
    {B00001110, B00010001, B00010001, B00001110, B00010001, B00010001, B00010001, B00001110}, ??
    {B00001110, B00010001, B00010001, B00001111, B00000001, B00000001, B00000001, B00000001}, ??
    {B00000000, B00000100, B00000100, B00000000, B00000000, B00000100, B00000100, B00000000}, ??
    {B00000000, B00000100, B00000100, B00000000, B00000000, B00000100, B00000100, B00001000}, ??
    {B00000001, B00000010, B00000100, B00001000, B00001000, B00000100, B00000010, B00000001}, ??
    {B00000000, B00000000, B00000000, B00011110, B00000000, B00011110, B00000000, B00000000}, ??
    {B00010000, B00001000, B00000100, B00000010, B00000010, B00000100, B00001000, B00010000}, ??
    {B00001110, B00010001, B00010001, B00000010, B00000100, B00000100, B00000000, B00000100}, ??
    {B00001110, B00010001, B00010001, B00010101, B00010101, B00010001, B00010001, B00011110}, ??
    {B00001110, B00010001, B00010001, B00010001, B00011111, B00010001, B00010001, B00010001}, ??
    {B00011110, B00010001, B00010001, B00011110, B00010001, B00010001, B00010001, B00011110}, ??
    {B00000111, B00001000, B00010000, B00010000, B00010000, B00010000, B00001000, B00000111}, ??
    {B00011100, B00010010, B00010001, B00010001, B00010001, B00010001, B00010010, B00011100}, ?
    {B00011111, B00010000, B00010000, B00011110, B00010000, B00010000, B00010000, B00011111}, ??
    {B00011111, B00010000, B00010000, B00011110, B00010000, B00010000, B00010000, B00010000}, ??
    {B00001110, B00010001, B00010000, B00010000, B00010111, B00010001, B00010001, B00001110}, ??
    {B00010001, B00010001, B00010001, B00011111, B00010001, B00010001, B00010001, B00010001}, ??
    {B00011111, B00000100, B00000100, B00000100, B00000100, B00000100, B00000100, B00011111}, ??
    {B00011111, B00000100, B00000100, B00000100, B00000100, B00000100, B00010100, B00001000}, ??
    {B00010001, B00010010, B00010100, B00011000, B00010100, B00010010, B00010001, B00010001}, ??
    {B00010000, B00010000, B00010000, B00010000, B00010000, B00010000, B00010000, B00011111}, ??
    {B00010001, B00011011, B00011111, B00010101, B00010001, B00010001, B00010001, B00010001}, ??
    {B00010001, B00011001, B00011001, B00010101, B00010101, B00010011, B00010011, B00010001}, ??
    {B00001110, B00010001, B00010001, B00010001, B00010001, B00010001, B00010001, B00001110}, ??
    {B00011110, B00010001, B00010001, B00011110, B00010000, B00010000, B00010000, B00010000}, ??
    {B00001110, B00010001, B00010001, B00010001, B00010001, B00010101, B00010011, B00001111}, ??
    {B00011110, B00010001, B00010001, B00011110, B00010100, B00010010, B00010001, B00010001}, ??
    {B00001110, B00010001, B00010000, B00001000, B00000110, B00000001, B00010001, B00001110}, ??
    {B00011111, B00000100, B00000100, B00000100, B00000100, B00000100, B00000100, B00000100}, ??
    {B00010001, B00010001, B00010001, B00010001, B00010001, B00010001, B00010001, B00001110}, ??
    {B00010001, B00010001, B00010001, B00010001, B00010001, B00010001, B00001010, B00000100}, ??
    {B00010001, B00010001, B00010001, B00010001, B00010001, B00010101, B00010101, B00001010}, ??
    {B00010001, B00010001, B00001010, B00000100, B00000100, B00001010, B00010001, B00010001}, ??
    {B00010001, B00010001, B00001010, B00000100, B00000100, B00000100, B00000100, B00000100}, ??
    {B00011111, B00000001, B00000010, B00000100, B00001000, B00010000, B00010000, B00011111}, ??
    {B00001110, B00001000, B00001000, B00001000, B00001000, B00001000, B00001000, B00001110}, ??
    {B00010000, B00001000, B00001000, B00000100, B00000100, B00000010, B00000010, B00000001}, ??
    {B00001110, B00000010, B00000010, B00000010, B00000010, B00000010, B00000010, B00001110}, ??
    {B00000100, B00001010, B00010001, B00000000, B00000000, B00000000, B00000000, B00000000}, ??
    {B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00011111}, ??
    {B00001000, B00000100, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000}, ??
    {B00000000, B00000000, B00000000, B00001110, B00010010, B00010010, B00010010, B00001111}, ??
    {B00000000, B00010000, B00010000, B00010000, B00011100, B00010010, B00010010, B00011100}, ??
    {B00000000, B00000000, B00000000, B00001110, B00010000, B00010000, B00010000, B00001110}, ??
    {B00000000, B00000001, B00000001, B00000001, B00000111, B00001001, B00001001, B00000111}, ??
    {B00000000, B00000000, B00000000, B00011100, B00010010, B00011110, B00010000, B00001110}, ??
    {B00000000, B00000011, B00000100, B00000100, B00000110, B00000100, B00000100, B00000100}, ??
    {B00000000, B00001110, B00001010, B00001010, B00001110, B00000010, B00000010, B00001100}, ??
    {B00000000, B00010000, B00010000, B00010000, B00011100, B00010010, B00010010, B00010010}, ??
    {B00000000, B00000000, B00000100, B00000000, B00000100, B00000100, B00000100, B00000100}, ??
    {B00000000, B00000010, B00000000, B00000010, B00000010, B00000010, B00000010, B00001100}, ??
    {B00000000, B00010000, B00010000, B00010100, B00011000, B00011000, B00010100, B00010000}, ??
    {B00000000, B00010000, B00010000, B00010000, B00010000, B00010000, B00010000, B00001100}, ??
    {B00000000, B00000000, B00000000, B00001010, B00010101, B00010001, B00010001, B00010001}, ??
    {B00000000, B00000000, B00000000, B00010100, B00011010, B00010010, B00010010, B00010010}, ??
    {B00000000, B00000000, B00000000, B00001100, B00010010, B00010010, B00010010, B00001100}, ??
    {B00000000, B00011100, B00010010, B00010010, B00011100, B00010000, B00010000, B00010000}, ??
    {B00000000, B00001110, B00010010, B00010010, B00001110, B00000010, B00000010, B00000001}, ??
    {B00000000, B00000000, B00000000, B00001010, B00001100, B00001000, B00001000, B00001000}, ??
    {B00000000, B00000000, B00001110, B00010000, B00001000, B00000100, B00000010, B00011110}, ??
    {B00000000, B00010000, B00010000, B00011100, B00010000, B00010000, B00010000, B00001100}, ??
    {B00000000, B00000000, B00000000, B00010010, B00010010, B00010010, B00010010, B00001100}, ??
    {B00000000, B00000000, B00000000, B00010001, B00010001, B00010001, B00001010, B00000100}, ??
    {B00000000, B00000000, B00000000, B00010001, B00010001, B00010001, B00010101, B00001010}, ??
    {B00000000, B00000000, B00000000, B00010001, B00001010, B00000100, B00001010, B00010001}, ??
    {B00000000, B00000000, B00010001, B00001010, B00000100, B00001000, B00001000, B00010000}, ??
    {B00000000, B00000000, B00000000, B00011111, B00000010, B00000100, B00001000, B00011111}, ??
    {B00000010, B00000100, B00000100, B00000100, B00001000, B00000100, B00000100, B00000010}, ??
    {B00000100, B00000100, B00000100, B00000100, B00000100, B00000100, B00000100, B00000100}, ??
    {B00001000, B00000100, B00000100, B00000100, B00000010, B00000100, B00000100, B00001000}, ??
    {B00000000, B00000000, B00000000, B00001010, B00011110, B00010100, B00000000, B00000000} ??
    }; ?
    ? ?
    void clearDisplay()?
    {
    ? ? for (byte x=0; x<8; x  )?
    ? ? { ?
    ? ? ? ?buffer[x] = B00000000; ?
    ? ? } ?
    ? ? screenUpdate(); ?
    } ?
    ??
    void initMAX7219()?
    { ?
    ? ? pinMode(DataPin, OUTPUT); ?
    ? ? pinMode(LoadPin, OUTPUT); ?
    ? ? pinMode(ClockPin, OUTPUT); ?
    ? ? clearDisplay(); ?
    ? ? writeData(B00001011, B00000111); ??
    ? ? writeData(B00001001, B00000000); ??
    ? ? writeData(B00001100, B00000001); ??
    ? ? intensity(1); ??
    } ?
    ? ?
    void intensity(int intensity)?
    { ?
    ? ? writeData(B00001010, intensity); ??
    } ?
    ? ?
    void writeData(byte MSB, byte LSB)?
    { ?
    ? ? byte mask; ?
    ? ? digitalWrite(LoadPin, LOW); ??
    ? ? ??
    ? ? for (mask = B10000000; mask>0; mask >>= 1)?
    ? ? { ??
    ? ? ? ? digitalWrite(ClockPin, LOW); ?
    ? ? ? ? if (MSB & mask)
    ? ? ? ? { ??
    ? ? ? ? ? ?digitalWrite(DataPin,HIGH); ??
    ? ? ? ? } ?
    ? ? ? ? else
    ? ? ? ? { ??
    ? ? ? ? ? ?digitalWrite(DataPin,LOW); ??
    ? ? ? ? } ?
    ? ? ? ? digitalWrite(ClockPin, HIGH); ??
    ? ? } ?
    ? ? ??
    ? ? for (mask = B10000000; mask>0; mask >>= 1)?
    ? ? { ??
    ? ? ? ? digitalWrite(ClockPin, LOW); ?
    ? ? ? ? if (LSB & mask)
    ? ? ? ? { ??
    ? ? ? ? ? ?digitalWrite(DataPin,HIGH); ??
    ? ? ? ? } ?
    ? ? ? ? else
    ? ? ? ? { ??
    ? ? ? ? ? ? digitalWrite(DataPin,LOW); ??
    ? ? ? ? } ?
    ? ? ? ? digitalWrite(ClockPin, HIGH); ??
    ? ? } ?
    ? ? digitalWrite(LoadPin, HIGH); ??
    ? ? digitalWrite(ClockPin, LOW); ?
    } ?
    ? ?
    void scroll(char myString[], int speed)?
    { ?
    ? ? byte firstChrRow, secondChrRow; ?
    ? ? byte ledOutput; ?
    ? ? byte chrPointer = 0; ??
    ? ? byte Char1, Char2; ??
    ? ? byte scrollBit = 0; ?
    ? ? byte strLength = 0; ?
    ? ? unsigned long time; ?
    ? ? unsigned long counter; ?
    ? ? ? ?
    ? ? while (myString[strLength]) {strLength  ;} ?
    ? ? counter = millis(); ?
    ? ? while (chrPointer < (strLength-1))?
    ? ? { ?
    ? ? ? ?time = millis(); ?
    ? ? ? ?if (time > (counter   speed))?
    ? ? ? ?{?
    ? ? ? ? ? Char1 = myString[chrPointer]; ?
    ? ? ? ? ? Char2 = myString[chrPointer 1]; ?
    ? ? ? ? ? for (byte y= 0; y<8; y  )?
    ? ? ? ? ? { ?
    ? ? ? ? ? ? firstChrRow = pgm_read_byte(&font[Char1 - 32][y]); ?
    ? ? ? ? ? ? secondChrRow = (pgm_read_byte(&font[Char2 - 32][y])) << 1; ?
    ? ? ? ? ? ? ledOutput = (firstChrRow << scrollBit) | (secondChrRow >> (8 - scrollBit) ); ?
    ? ? ? ? ? ? buffer[y] = ledOutput; ?
    ? ? ? ? ? } ?
    ? ? ? ? ? ? scrollBit  ; ??
    ? ? ? ? ? ? if (scrollBit > 6)?
    ? ? ? ? ? ? { ??
    ? ? ? ? ? ? ? scrollBit = 0; ?
    ? ? ? ? ? ? ? chrPointer  ; ?
    ? ? ? ? ? ? } ?
    ? ? ? ? ? ? counter = millis(); ?
    ? ? ? ? } ?
    ? ? } ?
    } ?
    ? ?
    void screenUpdate()?
    { ?
    ? ?for (byte row = 0; row < 8; row  )?
    ? ?{?
    ? ? ? writeData(row 1, buffer[row]); ?
    ? ?} ?
    } ?
    ? ?
    void setup()?
    { ?
    ? ?initMAX7219(); ?
    ? ?Timer1.initialize(10000); ? ? ??
    ? ?Timer1.attachInterrupt(screenUpdate); ??
    } ?
    ??
    void loop()?
    { ?
    ? ?clearDisplay(); ? ?
    ? ?scroll(" Arduino: ", 100);?// Display the message to scroll range of 100
    ? ?scroll(" - 2013 ", 100); // Add more lines to show other characters
    }

     

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Dot Matrix 8×8 Red LED Module MAX7219

65.00 EGP