Arduino Controller using smart phone

Circuit Diagram:

Arduino Source Code

const int redLed=12;

const int greenLed=11;

int state = 0;

//String s;

void setup() {

 pinMode(redLed, OUTPUT);

 pinMode(greenLed, OUTPUT);

 digitalWrite(redLed, LOW);

 digitalWrite(greenLed, LOW);

 Serial.begin(9600); // Default communication rate of the Bluetooth module

}

void loop() {

  

 if(Serial.available() > 0){ // Checks whether data is comming from the serial port

 state = Serial.read(); // Reads the data from the serial port

 if (state==0)

   digitalWrite(redLed, LOW);

 else if (state==1)

   digitalWrite(redLed, HIGH);

 if (state==2)

   digitalWrite(greenLed, LOW);

 else if (state==3)

   digitalWrite(greenLed, HIGH); 

 Serial.println(state); // Send back, to the phone, the String "LED: ON"

 }

}

Download Smartphone App

Octal encoder using Arduino and 7 segment display

Octal Encoder using Arduino and 7 segment display

Circuit diagram for Octal Encoder

Source Code for Octal Encoder

const int ledPin=13;

const int ledPin2=12; 

const int ledPin3=8;

const int buttonPin=2;

const int buttonPin2=3;

const int buttonPin3=7;

boolean lastButton=LOW;

boolean currentButton=LOW;

boolean ledOn=false;

boolean lastButton2=LOW;

boolean currentButton2=LOW;

boolean ledOn2=false;

boolean lastButton3=LOW;

boolean currentButton3=LOW;

boolean ledOn3=false;

int b3=0,b2=0,b1=0;

void setup() 

{

  pinMode(ledPin, OUTPUT);

  pinMode(4, OUTPUT);

  pinMode(buttonPin, INPUT);

  pinMode(ledPin2, OUTPUT);

  pinMode(buttonPin2, INPUT);

  pinMode(ledPin3, OUTPUT);

  pinMode(buttonPin3, INPUT);

  pinMode(5, OUTPUT);

  pinMode(6, OUTPUT);

  pinMode(9, OUTPUT);

  pinMode(10, OUTPUT);

  pinMode(11, OUTPUT);

  pinMode(14, OUTPUT);

  //digitalWrite(14 , HIGH);

  Serial.begin(9600);

}

boolean debounce(boolean last,int bp)

{

  boolean current=digitalRead(bp);

   if (last!=current)

  {

    current=digitalRead(bp);

  }

  return current;

  

}

void switchOffLED()

{

      digitalWrite(5 , false);//a

      digitalWrite(4 , false);//b     

      digitalWrite(14 , false);//c 

      digitalWrite(6 , false); //d

      digitalWrite(9 , false); //e

      digitalWrite(10 , false); //f 

      digitalWrite(11 , false);//g

}

void loop() 

{

  

  //Code for the first button from right to left

  /*int bs=digitalRead(buttonPin);

  Serial.println(bs);*/

  //b1=b2=b3=0;

  //b1=1;

  currentButton=debounce(lastButton,buttonPin);

  if (lastButton==LOW && currentButton==HIGH)

  {

      ledOn=!ledOn;     

     // Serial.println(ledOn);

      //digitalWrite(ledPin, ledOn);

     //digitalWrite(4 , ledOn);   

     // digitalWrite(2 , ledOn);

     if (b1==0)

       b1=1;  

      else

      b1=0;

    }

    

    

  

  lastButton=currentButton;

  digitalWrite(ledPin, ledOn);

  //Code for the second button from right to left

  currentButton2=debounce(lastButton2,buttonPin2);

  if (lastButton2==LOW && currentButton2==HIGH)

  {

    ledOn2=!ledOn2;

    if (b2==0)

      b2=1;

     else

       b2=0;

  }

  

  lastButton2=currentButton2;

  digitalWrite(ledPin2, ledOn2);

  //Code for the third button from right to left

  currentButton3=debounce(lastButton3,buttonPin3);

  if (lastButton3==LOW && currentButton3==HIGH)

  {

    ledOn3=!ledOn3;

    if(b3==0)

    b3=1;

    else

    b3=0;

  }

  

  lastButton3=currentButton3;

  digitalWrite(ledPin3, ledOn3);

  

  if(b3==0 && b2==0 && b1==0)  //0 Output

  {

      switchOffLED();

      digitalWrite(5 , true);

      digitalWrite(4 , true);     

      digitalWrite(14 , true); 

      digitalWrite(6 , true); 

      digitalWrite(9 , true); 

      digitalWrite(10 , true); 

  }

  else if(b3==0 && b2==0 && b1==1)  //1 Output

  {

      switchOffLED();

      digitalWrite(4 , true);     

      digitalWrite(14 , true); 

   }

   

   

   if(b3==0 && b2==1 && b1==0)   //2 Output

  {

      switchOffLED();

      digitalWrite(5, true);     

      digitalWrite(4 , true); 

      digitalWrite(11 , true);     

      digitalWrite(9 , true); 

      digitalWrite(6 , true);     

     

   }

   if (b3==0 && b2==1 && b1==1)

   {

     switchOffLED();

     digitalWrite(5, true);  

     digitalWrite(4, true);  

     digitalWrite(14, true);  

     digitalWrite(6, true);  

     digitalWrite(11, true);  

   }

   if (b3==1 && b2==0 && b1==0)

   {

      switchOffLED();

     digitalWrite(4, true);  

     digitalWrite(14, true);  

     digitalWrite(10, true);  

     digitalWrite(11, true);  

   }

   if (b3==1 && b2==0 && b1==1)

   {

      switchOffLED();

     digitalWrite(5, true);  

     digitalWrite(14, true);  

     digitalWrite(6, true);  

     digitalWrite(10, true);  

     digitalWrite(11, true);  

   }

   if (b3==1 && b2==1 && b1==0)

   {

      switchOffLED();

     digitalWrite(14, true);  

     digitalWrite(6, true);  

     digitalWrite(9, true);  

     digitalWrite(10, true);  

     digitalWrite(11, true);  

   }

   if (b3==1 && b2==1 && b1==1)

   {

      switchOffLED();

     digitalWrite(5, true);  

     digitalWrite(4, true);  

     digitalWrite(14, true);  

   }

}

3 Push Button(Toggle) Control using Arduino

Circuit for using 3 Push buttons controls

Source Code for controlling the push Buttons

const int ledPin=13;

const int ledPin2=12; 

const int ledPin3=8;

const int buttonPin=2;

const int buttonPin2=3;

const int buttonPin3=7;

boolean lastButton=LOW;

boolean currentButton=LOW;

boolean ledOn=false;

boolean lastButton2=LOW;

boolean currentButton2=LOW;

boolean ledOn2=false;

boolean lastButton3=LOW;

boolean currentButton3=LOW;

boolean ledOn3=false;

void setup() 

{

  pinMode(ledPin, OUTPUT);

  pinMode(buttonPin, INPUT);

  pinMode(ledPin2, OUTPUT);

  pinMode(buttonPin2, INPUT);

  pinMode(ledPin3, OUTPUT);

  pinMode(buttonPin3, INPUT);

  Serial.begin(9600);

}

boolean debounce(boolean last,int bp)

{

  boolean current=digitalRead(bp);

   if (last!=current)

  {

    current=digitalRead(bp);

  }

  return current;

}

void loop() 

{

  currentButton=debounce(lastButton,buttonPin);

  if (lastButton==LOW && currentButton==HIGH)

  {

      ledOn=!ledOn;     

  }

  lastButton=currentButton;

  digitalWrite(ledPin, ledOn);

  currentButton2=debounce(lastButton2,buttonPin2);

  if (lastButton2==LOW && currentButton2==HIGH)

  {

    ledOn2=!ledOn2;

  }

  lastButton2=currentButton2;

  digitalWrite(ledPin2, ledOn2);

  currentButton3=debounce(lastButton3,buttonPin3);

  if (lastButton3==LOW && currentButton3==HIGH)

  {

    ledOn3=!ledOn3;

  }

  lastButton3=currentButton3;

  digitalWrite(ledPin3, ledOn3);

}