Build Instructions

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• 1

  Circuit Connection

  The circuit connection is as shown in the figure below.

• 2

  Code

  #include<AmebaServo.h>
  
  AmebaServo myservo;
  const int trigPin=3;
  const int echoPin=5; 
  long duration;
  int distance;
  
  void setup() {
    Serial.begin(9600);
    myservo.attach(9);
    pinMode(trigPin, OUTPUT);
    pinMode(echoPin, INPUT); 
  }
  
  void loop() {
    digitalWrite(trigPin, LOW);
    delayMicroseconds(2);
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);
  
  // measure time duration of pulse HIGH at echo pin
  duration=pulseIn(echoPin, HIGH);
  
  // calculate the distance from car to sensor
  distance=(0.034*duration)/2;
  
  if(distance<=10){
    myservo.write(90);
    }
  else{
    myservo.write(0);
    }
    
    Serial.print("distance: ");
    Serial.println(distance);
    Serial.print(" cm");
    delay(1);
  }

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