Automatic hand sanitizer using arduino

1
2 
3 #include <Servo.h>
4#define trigPin 3
5#define echoPin 2
6Servo   servo;
7int sound = 250;
8void setup() {
9Serial.begin (9600);
10pinMode(trigPin,   OUTPUT);
11pinMode(echoPin, INPUT);
12servo.attach(4);
13}
14void loop() {
15long   duration, distance;
16digitalWrite(trigPin, LOW);
17delayMicroseconds(2);
18digitalWrite(trigPin,   HIGH);
19delayMicroseconds(10);
20digitalWrite(trigPin, LOW);
21duration = pulseIn(echoPin,   HIGH);
22distance = (duration/2) / 29.1;
23if (distance < 5) {
24Serial.println("the   distance is less than 5");
25servo.write(90);
26}
27else {
28servo.write(0);
29}
30if   (distance > 60 || distance <= 0){
31Serial.println("The distance is more than   60");
32}
33else {
34Serial.print(distance);
35Serial.println(" cm");
36}
37delay(500);
38}
39

1
2 
3 #include <Servo.h>
4#define trigPin 3
5#define echoPin 2
6Servo  servo;
7int sound = 250;
8void setup() {
9Serial.begin (9600);
10pinMode(trigPin,  OUTPUT);
11pinMode(echoPin, INPUT);
12servo.attach(4);
13}
14void loop() {
15long  duration, distance;
16digitalWrite(trigPin, LOW);
17delayMicroseconds(2);
18digitalWrite(trigPin,  HIGH);
19delayMicroseconds(10);
20digitalWrite(trigPin, LOW);
21duration = pulseIn(echoPin,  HIGH);
22distance = (duration/2) / 29.1;
23if (distance < 5) {
24Serial.println("the  distance is less than 5");
25servo.write(90);
26}
27else {
28servo.write(0);
29}
30if  (distance > 60 || distance <= 0){
31Serial.println("The distance is more than  60");
32}
33else {
34Serial.print(distance);
35Serial.println(" cm");
36}
37delay(500);
38}
39