Make an Automated Bubble Gun Using an Ultrasonic Sensor

1#include <Servo.h>
2
3Servo myservo;
4
5const int trigPin = 6;
6const int echoPin = 7;
7const int servoPin = 8;
8
9
10float duration, distance;
11
12
13void setup() {
14  // put your setup code here, to run once:
15  myservo.attach(servoPin);
16  pinMode(servoPin, OUTPUT);
17  pinMode(trigPin, OUTPUT);
18  pinMode(echoPin, INPUT);
19  Serial.begin(9600);
20}
21
22
23void loop() {
24  // put your main code here, to run repeatedly:
25  digitalWrite(trigPin, LOW);
26  delayMicroseconds(2);
27  digitalWrite(trigPin, HIGH);
28  delayMicroseconds(10);
29  digitalWrite(trigPin, LOW);
30  duration = pulseIn(echoPin, HIGH);
31  distance = (duration * 0.0343) / 2;
32  Serial.print(distance, 3);
33  Serial.println("cm");
34  delay(100);
35  if (distance < 30) {
36    if (myservo.read() != 120) {
37      for (int angle=myservo.read(); angle<121;angle++) {
38      myservo.write(angle);
39      delay(10);
40    }
41    }
42  }
43  else {
44    if (myservo.read() != 30) {
45      for (int angle=myservo.read(); angle>=30; angle--) {
46        myservo.write(angle);
47        delay(10);
48      }
49    }
50  }
51  }