Chest Freezer To Refrigerator Conversion: Difference between revisions

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*[https://www.arduino.cc/en/Main/ArduinoGemma Arduino Gemma] $9.95
*[https://www.arduino.cc/en/Main/ArduinoGemma Arduino Gemma] $9.95
**or [https://www.adafruit.com/products/1500 adafruit Trinket] $6.95
**or [https://www.adafruit.com/products/1500 adafruit Trinket] $6.95
**or [https://www.sparkfun.com/products/12587 sparkfun Pro Micro] $19.95
**or [https://www.sparkfun.com/products/12587 sparkfun Pro Micro] $19.95 - [https://github.com/sparkfun/Arduino_Boards Install Instructions]
*[https://www.sparkfun.com/products/13015 24-280VAC Relay] $9.95
*[https://www.sparkfun.com/products/13015 24-280VAC Relay] $9.95
*[https://www.sparkfun.com/products/250 Thermister] $0.75
*[https://www.sparkfun.com/products/250 Thermister] $0.75

Revision as of 00:33, 9 November 2016

BOM

Arduino Code


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

  volatile int sensorvalue = 330;
  int triggeron = 330;
  int triggeroff = 300;

void setup() {
  digitalWrite(3, HIGH);   // turn the LED on (HIGH is the voltage level)
  digitalWrite(7, LOW);    // initialize in OFF setting
  digitalWrite(5, LOW);    // set pin 5 low
  pinMode(3, OUTPUT);
  pinMode(7, OUTPUT);
  delay(20000);
}

// the loop function runs over and over again forever
void loop() {
  sensorvalue = analogRead(A1);   // turn the LED on (HIGH is the voltage level)
if (sensorvalue > triggeron){
  digitalWrite(7, HIGH);
  delay(8000);
}
if (triggeroff > sensorvalue){
  digitalWrite(7, LOW);
  delay(8000);
}
}

Other Options

Further Reading

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