DTMF based automation

DTMF based Automation (Switching)

          As technology is advancing so houses are also getting smarter. Modern houses are gradually shifting from conventional switches to centralized control system, involving remote controlled switches. Presently, conventional wall switches located in different parts of the house makes it difficult for user to go near them to operate. Even more it becomes more difficult for elderly or physically handicapped people to do so.

     the DTMF technology is one of the easiest and simple technique to implement home automation. by this method we can switch ON / OFF of any of the electric appliances in home by pressing keys on mobile keypad. 

** Use variable resistors (POTS) for better output.

CM8870 DATA SHEET (Click Here)

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SOLAR TRACKING

SOLAR TRACKING

a mini project for EEE students :

              Solar energy is rapidly advancing as an important means of renewable energy source.Solar tracking enables more solar energy to be generated because the solar panel is able to maintain a perpendicular profile to the sun rays.Through initial cost of setting of a solar tracking system is high,this paper proposes a cheaper solution . Design and construction of prototype for solar tracking system with single degree of freedom,which detects sunlight using light dependent resistors (LDR) , is discussed.

Here is the code :

#include<Servo.h>

Servo myservo;
int pos = 90;
int sens1 = A0;
int sens2 = A1;
int tolerance = 2;

void setup()
{
  myservo.attach(9);
  pinMode(sens1, INPUT);
  pinMode(sens2, INPUT);
  myservo.write(pos);
  delay(2000);
}

void loop()
{
  int val1 = analogRead(sens1);
  int val2 = analogRead(sens2);

  if ((abs(val1 - val2) <= tolerance) || (abs(val2 - val1) <= tolerance)) 
  {
  
  }
  else {
    if (val1 > val2)
    {
      pos = --pos;
    }
    if (val1 < val2)
    {
      pos = ++pos;
    }
  }

  if (pos > 180) {
    pos = 180;
  }
  if (pos < 0) {
    pos = 0;  
  }

  myservo.write(pos);
  delay(50);
}

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ARDUINO BASED HOME AUTOMATION

ARDUINO BASED HOME AUTOMATION

          The main objective of this project is to develop a home automation system using an Arduino board with LM35 and PIR sensors. As technology is advancing so houses are also getting smarter. Modern houses are gradually shifting from conventional switches to centralized control system, involving remote controlled switches. Presently, conventional wall switches located in different parts of the house makes it difficult for user to go near them to operate. Even more it becomes more difficult for elderly or physically handicapped people to do so.

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