LED Matrix Driver Module + LED Dot Matrix 8x8 ขนาด 40mm x 40mm พร้อมสายไฟ

โมดูล LED Dot Matrix 8x8 ดวง ขนาดจอ เส้นทะแยงมุม 40x40 มิลลิเมตร สามารถใช้งานเดี่ยว ๆ หรือนำมาเรียงต่อกันเพื่อทำไฟวิ่งแสดงข้อความได้ ใช่ง่าย มีตัวอย่างและโคดการใช้งาน

The kit includes the following components:

• MAX7219
• Electrolytic capacitor：10uF/25V
• Resistor：10K
• Capacitance：0.1uF
• Headers and receptacles.

Specification of LED Matrix:

• Operating Voltage: DC 4.7V – 5.3V
• Typical Voltage: 5V
• Operating Current: 320mA
• Max Operating Current: 2A
• Operating Temperature: 0 ℃ – 50 ℃
• Typical Temperature: 25 ℃

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Library

• https://www.dropbox.com/s/l6bdjp8l40rqs92/LED%20Matrix%20Driver.rar?dl=0

• http://www.mediafire.com/download/vfbojs22dyfm5q1/LED_Matrix_Driver.rar

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ตัวอย่างการใช้งาน

LED Matrix Driver MAX7219 -> arduino

Vcc -> 5V

GND -> GND

DIN -> Pin 12

CS -> Pin 10

CLK -> Pin 11

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ตัวอย่าง Code

//We always have to include the library

#include "LedControlMS.h"

/*

 Now we need a LedControl to work with.

 ***** These pin numbers will probably not work with your hardware *****

 pin 12 is connected to the DataIn 

 pin 11 is connected to the CLK 

 pin 10 is connected to LOAD 

 We have only a single MAX72XX.

 */

#define NBR_MTX 2 

LedControl lc=LedControl(12,11,10, NBR_MTX);

String digits= "1234567890";

int digitCounter=0;

/* we always wait a bit between updates of the display */

unsigned long delaytime=300;

void setup() {

  /*

   The MAX72XX is in power-saving mode on startup,

   we have to do a wakeup call

   */

  Serial.begin (9600);

  Serial.println("Setup");

  digitCounter=0;

  for (int i=0; i< NBR_MTX; i++){

    lc.shutdown(i,false);

  /* Set the brightness to a medium values */

    lc.setIntensity(i,8);

  /* and clear the display */

    lc.clearDisplay(i);

  }

  lc.writeString(0,"Myarduino");

  lc.writeString(1,"Myarduino");

  delay(1000);

  lc.clearAll();

  scrollLeft('0');

  delay(1000);

  lc.clearAll();

  scrollRight('O');

  delay(1000);

  lc.clearAll();

}

void loop() { 

  char ch= digits[digitCounter];

  digitCounter++;

  if (digitCounter>9) digitCounter=0;

  lc.displayChar(0, lc.getCharArrayPosition(ch));

  lc.displayChar(1, lc.getCharArrayPosition(ch));

  delay(1000);

  lc.clearAll();

  delay(200);

}

void scrollLeft(char ch){

  int pos =lc.getCharArrayPosition(ch);

  for (int scroll =0; scroll<6; scroll++) {

     for (int i=scroll; i<6;i++) {

        lc.setRow(0,i-scroll, alphabetBitmap[pos][i]);

    } 

    delay(300);

    lc.clearDisplay(0);

  }

}

void scrollRight(char ch){

  int pos =lc.getCharArrayPosition(ch);

  for (int scroll =0; scroll<8; scroll++) {

     for (int i=0; i<6;i++) {

        if (scroll+i<8) lc.setRow(0, scroll+i, alphabetBitmap[pos][i]);

    } 

    delay(300);

    lc.clearDisplay(0);

  }

}

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