Seniai jau darytas projektas tik niekaip negalėjau (nesugebėjau) aprašyti jo. Kilo idėja Arduino pajungti prie šviesos diodų matricos panaudojant MAX7219 Led valdiklį (draiverį). Kas įdomausia – į vieną eilę 3 valdymo laidais galima pajungti iki 8 tokių modulių. Gaunama 8×64 taškų eilutė.

Pati schema elementari, plokštė gavosi 6cmx6cm

programos kodas:

#include „LedControl.h“
int devices = 3; //moduliu skaicius
LedControl lc = LedControl (10, 12, 11, devices);

unsigned long delaytime = 50;
int row;
int col;
int address;

void setup (){
	for (int address = 0; address < devices; address++){
		lc.shutdown (address, false);
		lc.setIntensity (address, 12);
		lc.clearDisplay (address);}
	}

void clr_disp (int dev){
	delay (1000);
	for (address = 0; address < dev; address++){
		lc.clearDisplay (address);}
	}

void fill_pixel (int dev){
	for (row = 0; row < 8; row++){
		for (address = 0; address < dev; address++){
			for (col = 0; col < 8; col++){
				delay (delaytime);
				lc.setLed (address, row, col, true);}
			}
		}
	}

void fill_col_right (int dev, int b){
	for (address = 0; address < dev; address++){
		for (col = 0; col < 8; col++){
			delay (delaytime);
			lc.setColumn (address, col, b);}
		}
	}

void fill_col_left (int dev, int b){
	for (address = dev-1; address >= 0; address--){
		for (col = 7; col >= 0; col--;){
			delay (delaytime);
			lc.setColumn (address, col, b);}
		}
	}

void fill_row_down (int dev, int b){
	for (row = 0; row < 8; row++){
		for (address = 0; address < dev; address++){
			lc.setRow (address, row, b);}
			delay (delaytime);
		}
	}

void fill_row_up (int dev, int b){
	for (row = 7; row >= 0; row--;){
		for( address = 0; address < dev; address++){
			lc.setRow (address, row, b);}
			delay (delaytime);
		}
	}

void loop (){
	clr_disp (devices);
	fill_col_right (devices, 255);
	fill_row_down (devices, 0);
	fill_row_up (devices, 255);
	fill_col_left (devices, 0);
	}

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