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 /*   
  This sketch increases a 3 bit number every time '+' button is pressed and decreases the value when '-' button is pressed on the remote.It shows the output on 3 LEDs in Binary Format   
  */  
 #include   
 int RECV_PIN = 15;  
 IRrecv irrecv(RECV_PIN);  
 decode_results results;  
 int i = 0;  
 void setup()  
 {  
  pinMode(11,OUTPUT);   // declare LED pins as output pins  
  pinMode(12,OUTPUT);  
  pinMode(13,OUTPUT);  
  pinMode(7,INPUT);// Declare the 7th pin as a input pin. We will use the button on the 7th pin  
  digitalWrite(7,HIGH);  
  irrecv.enableIRIn(); // Start the Remote receiver  
  Serial.begin(9600);  
 }  
 void loop()  
 {  
  if (irrecv.decode(&results)) {  
   Serial.println(results.value);  
   switch(results.value)  // if the '+' button is pressed  
   {  
   case 2320:   
    i=0;   
    break;// 2320 is the value for '0'  
   case 16:   
    i=1;   
    break;// 16 is the value for '1'  
   case 2064:   
    i=2;   
    break;// 2064 is the value for '2'  
   case 1040:   
    i=3;   
    break;// 1040 is the value for '3'  
   case 3088:   
    i=4;   
    break;// 3088 is the value for '4'  
   case 528:   
    i=5;   
    break;// 528 is the value for '5'  
   case 2576:   
    i=6;   
    break;// 2576 is the value for '6'  
   case 1552:   
    i=7;   
    break;// 1552 is the value for '7'  
   case 1168: // this is the value for the increment button  
    if(i<7 3216:="" 3="" 7="" bits="" break="" button="" case="" counter="" decrement="" else="" for="" i="" if="" increment="" is="" less="" or="" than="" the="" this="" value="">0)        // if counter value is greater than 0 or 3 bits  
     i--;        // decrement counter value  
    else           
     i=7;        // reset counter to 7  
     break;  
   }  
   int a=i%2;      // calculate LSB   
   int b=i/2 %2;     // calculate middle bit  
   int c=i/4 %2;     // calculate MSB   
   digitalWrite(11,c);  // write MSB  
   digitalWrite(12,b);  // write middle bit  
   digitalWrite(13,a);  // write LSB  
   while(digitalRead(7)==0);  // wait till button is released to avoid incrementing the counter again  
   delay(300);         // small delay to avoid debounce  
   irrecv.resume(); // Receive the next value  
  }  
 }