Running LED dan Button - Arduino
 rangkailah rangkaian berikut            upload sketch berikut kearduino      int i,val; int button1=8; int button2=9; unsigned char led[8]={~0x01, ~0x02, ~0x04, ~0x08, ~0x10, ~0x20, ~0x40, ~0x80}; unsigned char leda[8]={0b11111100, 0b11111001, 0b11110011, 0b11100111, 0b11001111, 0b10011111, 0b00111111, 0b01111111}; void ledplus() {   for(i=0;i<=7;i++)             {               if(digitalRead(button2)==LOW)               {                 return;// delay(500);               }               PORTD=led[i];               delay(300);                         }        PORTD=0xC3; delay(1000);        for(i=7;i>=0;i--)             {                if(digitalRead(button2)==LOW)               {                 return;//break; //delay(500);               }               PORTD=~led[i];               delay(200);             }      PORTD=0xFF;         }  void ledmin() {   for(i=0;i<=7;i++)             {               if(digitalRead(button1)==LOW)               {                 return;//br...