Chest Freezer To Refrigerator Conversion: Difference between revisions

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//A1 read voltage
//A1 read voltage
//D3 sensor power
//D3 sensor power
//D5 relay low
//D7 relay (+)
//D7 relay high
 


   volatile int sensorvalue = 328; //define the variable
   volatile int sensorvalue = 328; //define the variable
Line 26: Line 26:
   int triggeroff = 304;        //number that will trigger fridge off
   int triggeroff = 304;        //number that will trigger fridge off


// the setup function only runs once every time the chip is reset
void setup() {
void setup() {
   digitalWrite(3, HIGH);   // turn the LED on (HIGH is the voltage level)
   digitalWrite(3, HIGH); //for powering thermister 
   digitalWrite(7, LOW);   // initialize in OFF setting
   digitalWrite(7, LOW); //for switching relay
   digitalWrite(5, LOW);    // set pin 5 low
   pinMode(3, OUTPUT);    //begin operating pin
  pinMode(3, OUTPUT);
   pinMode(7, OUTPUT);   //begin operating pin
   pinMode(7, OUTPUT);
   delay(20000);         // wait for thermister to get a good initial reading
   delay(20000);
}
}


Revision as of 21:16, 19 November 2016

BOM

Arduino Code


//A1 read voltage
//D3 sensor power
//D7 relay (+)


  volatile int sensorvalue = 328; //define the variable
  int triggeron = 328;         //number that will trigger fridge on
  int triggeroff = 304;        //number that will trigger fridge off


// the setup function only runs once every time the chip is reset
void setup() {
  digitalWrite(3, HIGH); //for powering thermister  
  digitalWrite(7, LOW);  //for switching relay
  pinMode(3, OUTPUT);    //begin operating pin
  pinMode(7, OUTPUT);    //begin operating pin
  delay(20000);          // wait for thermister to get a good initial reading
}

// the loop function runs over and over again forever
void loop() {
  sensorvalue = analogRead(A1);   //read sensor
if (sensorvalue > triggeron){     //if sensor reads over triggeron, turn on
  digitalWrite(7, HIGH);       //turn on relay
  delay(8000);                 //wait 8 seconds
}
if (triggeroff > sensorvalue){   //if sensor reads below triggeroff, turn off
  digitalWrite(7, LOW);         //turn off relay
  delay(8000);                  //wait 8 seconds
}
}

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