├── README.md
└── Sanitizer .ino


/README.md:
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1 | # Sanitizer-with-Arduino
2 | By using Arduino, Pump, Ultrasonic Sensor, Breadboard, Jumpers and Resistors
3 | 


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/Sanitizer .ino:
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  1 | //Ultasonic Sensor
  2 | 
  3 |   
  4 | //Pins connected to the ultrasonic sensor
  5 | 
  6 | #define trigPin  2
  7 | 
  8 | #define echoPin 3
  9 | 
 10 | #define pump 8
 11 | 
 12 | int range = 5;//range in inches
 13 | 
 14 | 
 15 | void setup() {
 16 | 
 17 |   // initialize serial communication:
 18 | 
 19 |   Serial.begin(9600);
 20 | 
 21 |   //initialize the sensor pins
 22 | 
 23 |   pinMode(trigPin, OUTPUT);
 24 | 
 25 |   pinMode(echoPin, INPUT);
 26 | 
 27 |   //initialize LED pins
 28 | 
 29 |   pinMode(pump, OUTPUT);
 30 | 
 31 |   digitalWrite(pump, LOW);
 32 | 
 33 |  
 34 | 
 35 | }
 36 | 
 37 | void loop()
 38 | 
 39 | {
 40 | 
 41 |   // establish variables for duration of the ping,
 42 | 
 43 |   // and the distance result in inches and centimeters:
 44 | 
 45 |   long duration, inches, cm;
 46 | 
 47 | 
 48 |   // The PING))) is triggered by a HIGH pulse of 2 or more microseconds.
 49 | 
 50 |   // Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
 51 | 
 52 |   digitalWrite(trigPin, LOW);
 53 | 
 54 |   delayMicroseconds(2);
 55 | 
 56 |   digitalWrite(trigPin, HIGH);
 57 | 
 58 |   delayMicroseconds(10 );
 59 | 
 60 |   digitalWrite(trigPin, LOW);
 61 | 
 62 | 
 63 |   // Take reading on echo pin
 64 | 
 65 |   duration = pulseIn(echoPin, HIGH);
 66 | 
 67 | 
 68 |   // convert the time into a distance
 69 | 
 70 |   inches = microsecondsToInches(duration);
 71 | 
 72 |   cm = microsecondsToCentimeters(duration);
 73 | 
 74 |  
 75 | 
 76 |   Serial.print(inches);
 77 | 
 78 |   Serial.print("in, ");
 79 | 
 80 |   Serial.print(cm);
 81 | 
 82 |   Serial.print("cm");
 83 | 
 84 |   Serial.println();
 85 | 
 86 |  
 87 | 
 88 |   if(inches < 5) {
 89 | 
 90 |     Serial.println("hand puted");
 91 | 
 92 | 
 93 |     digitalWrite(pump, HIGH);
 94 | 
 95 |      
 96 | 
 97 |     delay(100);
 98 | 
 99 |   } else {
100 | 
101 |     Serial.println("no hand");
102 | 
103 |      digitalWrite(pump, LOW);
104 | 
105 |      delay(100);
106 | 
107 |   }  
108 | 
109 |  
110 | 
111 |   delay(200);
112 | 
113 | }
114 | 
115 | 
116 | long microsecondsToInches(long microseconds)
117 | 
118 | {
119 | 
120 | 
121 |   return microseconds / 74 / 2;
122 | 
123 | }
124 | 
125 | 
126 | long microsecondsToCentimeters(long microseconds)
127 | 
128 | {
129 | 
130 |   // The speed of sound is 340 m/s or 29 microseconds per centimeter.
131 | 
132 |   // The ping travels out and back, so to find the distance of the
133 | 
134 |   // object we take half of the distance travelled.
135 | 
136 |   return microseconds / 29 / 2;
137 | 
138 | }
139 | 


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