DIY UV Box For Sanitizing Objects.md

DIY UV Box For Sanitizing Objects

BOM

1. arduino
2. UV light
3. relay
4. limit switch
5. leds
6. pot
7. push buttons
8. leds
9. wiresrelay

Tools

1. soldering iron & lead
2. wire stripper
3. male female headers
4. pc with arduino IDE

Working

• open the enclosure and put the object inside it
• set sanitizing time using pot and press start button
• ones done the uv light will turn off
• if the door is opend during cleaning the uv will get turned off

uvbox.ino

const int GatePin = 5 ;
const int StartPin = 6;
const int uvPin = 4;
const int potPin = A0;
const int Green_led = 7;
const int Red_led = 8; 
unsigned long bTime = 0;
unsigned long bfor = 0;
int potVal = 0;
bool isOpen = true;
bool uvState = false;
unsigned long startMillis = 0;
bool debug = true;


void setup() {
  if (debug == true)
    Serial.begin(9600);
  pinMode(GatePin, INPUT);
  pinMode(StartPin, INPUT);
  pinMode(uvPin, OUTPUT);
  digitalWrite(Green_led,HIGH);
}

void loop() {
  if (debug == true)
    Serial.println();

  // Read Gate State
  if (digitalRead(GatePin) == LOW) {
    isOpen = false;
    if (debug == true)
      Serial.print("Door : Closed ");
  }
  else {
    isOpen = true;
    if (debug == true)
      Serial.print("Door : Opened ");
  }

  // Read Pot Value
  potVal = analogRead(potPin);
  if (debug == true)
    Serial.print("bTime : ");

  if (potVal > 0 && potVal <= 255) {
    bTime = 15000;
    if (debug == true)
      Serial.print("15k ");
  }
  else if (potVal > 255 && potVal <= 560) {
    bTime = 30000;
    if (debug == true)
      Serial.print("30k ");
  }
  else if (potVal > 560 && potVal <= 715) {
    bTime = 45000;
    if (debug == true)
      Serial.print("45k ");
  }
  else if (potVal > 715 && potVal <= 1023) {
    bTime = 60000;
    if (debug == true)
      Serial.print("60k ");
  }

  //start baking if startbtn pressed

  if (uvState != true) {
    if (digitalRead(StartPin) == LOW && digitalRead(GatePin) == LOW) {
      startMillis = millis();
      uvState = true;
      bfor = bTime;
      digitalWrite(uvPin, HIGH);
      digitalWrite(Red_led,HIGH);
      digitalWrite(Green_led,LOW);
    }
  }

  if (uvState == true)
    Serial.print("UV : ON ");
    Serial.print("LED : ON ");

  unsigned long currentMillis = millis();

  if (currentMillis - startMillis >= bfor || digitalRead(GatePin) == HIGH) {
    uvState = false;
    digitalWrite(uvPin, LOW);
    digitalWrite(Red_led,LOW);
    digitalWrite(Green_led,HIGH);
    if (debug == true)
      Serial.print("UV : OFF ");
  }

  if (debug == true && uvState == true){
    Serial.print("Time : ");
    Serial.print(currentMillis - startMillis);
  }
}