Bermain Running LED dengan Arduino dan Shift Register 74HC595

Lampu LED seolah-olah berjalan dari satu led ke led berikutnya.. dari led-1 ke led-16.. karena 74HC595 fungsinya mengubah input data serial ke parallel dengan 8-bit.. karena jumlah led ada 16 buah dibutuhkan dua buah 74hc595.. jadi disini menggeser bit-0 ke bit-7 lalu lanjutkan ke 74hc595 yang kedua.. dan terus berulang-ulang..

Baca Juga

Sketch tanpa library shift register 74hc595..

	const int SH = 8;
	const int DS = 9;
	const int ST = 10;
	unsigned int j;

	void _74HC595(char x)
	{
	int k;
	for(k=0;k<8;k++)
	{
	if((x & 0x80)==0x80)
	{
	digitalWrite(DS,HIGH);
	}
	else
	{
	digitalWrite(DS,LOW);
	}

	x=x<<1;
	digitalWrite(SH,LOW);
	digitalWrite(SH,HIGH);
	}
	}
	void LED( unsigned char temp1,unsigned char temp2)//unsigned char temp3,unsigned char temp4,unsigned char temp5,unsigned char temp6,unsigned char temp7,unsigned char temp8)
	{
	_74HC595(temp1);
	_74HC595(temp2);
	digitalWrite(ST,LOW);
	digitalWrite(ST,HIGH);
	}

	void LED1()
	{
	unsigned char chay[9]={0x01,0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};

	for(j=1;j<=8;j++)
	{
	LED(0,chay[j]);
	delay(20);
	}
	for(j=1;j<=8;j++)
	{
	LED(chay[j],0);
	delay(20);
	}

	}

	void LED2()
	{
	unsigned char ledcode[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};
	for(j=0;j<=7;j++)
	{
	LED(ledcode[j],0);
	delay(20);
	}
	for(j=0;j<=7;j++)
	{
	LED(0,ledcode[j]);
	delay(20);
	}

	}

	//=============================================================
	void LED3()
	{
	unsigned char ledcode[8]={0x01,0x03,0x07,0x0f,0x1f,0x3f,0x7f,0xff};
	for(j=0;j<=7;j++)
	{
	LED(0,ledcode[j]);
	delay(20);
	}
	for(j=0;j<=7;j++)
	{
	LED(ledcode[j],255);
	delay(20);
	}

	}

	void LED4()
	{
	unsigned char dan[8]={0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff};
	for(j=0;j<=7;j++)
	{
	LED(dan[j],0);
	delay(20);
	}
	for(j=0;j<=7;j++)
	{
	LED(255,dan[j]);
	delay(20);
	}

	}

	void setup() {
	// put your setup code here, to run once:
	pinMode(SH, OUTPUT);
	pinMode(DS, OUTPUT);
	pinMode(ST, OUTPUT);
	}

	void loop() {
	// put your main code here, to run repeatedly:
	while(1)
	{
	LED1();
	LED2();
	LED3();
	LED4();
	}
	}