Sanitizer dispenser.md

Sanitizer Dispenser

BOM

1. arduino
2. dc pump
3. relay
4. leds
5. buttons
6. ir sensor
7. fluid level sensor
8. pot
9. wires
10. some elctronic components

Tools

1. soldring iron & led
2. wire stripper
3. pc with arduino IDE

Working

when device is turned on an led indicates it's ready when hand is placed under the sensor it dispense sanitizer and lights up another led the amount time it dispense the fluid can be controlled by th pot if the hand is still there after the set time it will not spill anything until hand is removed an reintroduced if the fluid in the tank go low another led will lightup and the device will not work untill fluid is refilled

sanitizer.ino

// INPUTS
int sensorPin = 2;
int flotPin = 3;
int potPin = A0;

// OUTPUTS
int relayPin = 5;
int readyPin = 6; 

int potVal;
int spillTime;
int trigTime;

bool isRunning = false;
bool sensorDetected;
bool noFluid;
bool isReady = false;

unsigned long readDelay = 1000;
unsigned long sqartMillis;
unsigned long sensorCounter;
unsigned long squartCounter;

void setup() {
  Serial.begin(9600);

  pinMode(relayPin, OUTPUT);
  pinMode(readyPin, OUTPUT);
  pinMode(sensorPin, INPUT);
  pinMode(flotPin, INPUT_PULLUP);

  digitalWrite(readyPin, HIGH);
  digitalWrite(relayPin, LOW);
}

void loop() {
  pot();
  
  if (digitalRead(flotPin) == LOW) {
    noFluid = true;
  }
  else if(digitalRead(flotPin) == HIGH){
    noFluid = false;
  }

  if (sensorDetected != true && digitalRead(sensorPin) == HIGH) {
    sensorDetected = true;
    sensorCounter = millis();
  }
  else if (digitalRead(sensorPin) == LOW) {
    sensorDetected = false;
  }

  unsigned long currentMillis = millis();

  if (isRunning != true && noFluid != true && sensorDetected == true && currentMillis - sensorCounter >= readDelay) {
    trigTime = spillTime;
    squartCounter = millis();
    digitalWrite(relayPin, HIGH);
    isRunning = true;
    isReady = false;
  }

  if (isRunning == true) {
    if (currentMillis - squartCounter >= trigTime || sensorDetected == false || noFluid == true) {
      digitalWrite(relayPin, LOW);
      isReady = true;
      if(sensorDetected == false){
        isRunning = false;
      }
    }
  }

  if (isReady == true && noFluid != true) {
    digitalWrite(readyPin, HIGH);
  }
  else {
    digitalWrite(readyPin, LOW);
  }
} // loop


void pot() {
  potVal = analogRead(potPin);

  if (potVal >= 0 && potVal <= 93) {
    spillTime = 500;
  }
  else if (potVal >= 93 && potVal <= 186) {
    spillTime = 600;
  }
  else if (potVal >= 186 && potVal <= 279) {
    spillTime = 700;
  }
  else if (potVal >= 279 && potVal <= 372) {
    spillTime = 800;
  }
  else if (potVal >= 372 && potVal <= 465) {
    spillTime = 900;
  }
  else if (potVal >= 465 && potVal <= 558) {
    spillTime = 1000;
  }
  else if (potVal >= 588 && potVal <= 651) {
    spillTime = 1100;
  }
  else if (potVal >= 651 && potVal <= 744) {
    spillTime = 1200;
  }
  else if (potVal >= 744 && potVal <= 837) {
    spillTime = 1300;
  }
  else if (potVal >= 837 && potVal <= 930) {
    spillTime = 1400;
  }
  else if (potVal >= 930 && potVal <= 1023) {
    spillTime = 1500;
  }
}