Servo With Ultrasonic Sensor
10-11-2017
Language or Platform: Arduino
Code:
// This program was used for ticket gate used for
// my daughters toy cars. The gate lifts up and
// allows cars to pass through once the sonar sensor
// picks up the car.
// A servo motor and ultrasonic sensor are used.
#include <Servo.h>
Servo myservo;
int pos = 180;
// defines pins numbers for ultrasonic
const int trigPin = 9;
const int echoPin = 10;
// defines variables
long duration;
int distance;
void setup() {
// servo
myservo.write(pos);
myservo.attach(4);
// ultrasonic
pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
pinMode(echoPin, INPUT); // Sets the echoPin as an Input
Serial.begin(9600); // Starts the serial communication
}
void loop() {
// Clears the trigPin
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);
// Calculating the distance
distance= duration*0.034/2;
// Prints the distance on the Serial Monitor
// Serial.print("Distance: ");
// Serial.println(distance);
if (distance > 10) {
// Serial.print("Greater"); Can use serial monitor to test and make sure it's working
delay(600);
myservo.write(10); // Give the car time to pull up and leave the gate
}
else {
// Serial.print("Greater");
delay(600);
myservo.write(100);
}
}