Rangkaian FSR.JPG

responsi ssa 04.ino

/*
* Ultrasonic Sensor HC-SR04 and Arduino Tutorial
*
* by Dejan Nedelkovski,
* www.HowToMechatronics.com
*
*/
// defines output pin
#define LED1 2
#define LED2 3
#define LED3 4

// defines pins numbers
const int trigPin = 9;
const int echoPin = 10;

// defines variables
long duration;
int distance;

void setup() {
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
pinMode(LED1, OUTPUT)
pinMode(LED2, OUTPUT)
pinMode(LED3, OUTPUT)
}

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){
    digitalWrite(LED1, HIGH)
}else{
    digitalWrite(LED1, LOW)
}
if(distance>20){
    digitalWrite(LED2, HIGH)
}else{
    digitalWrite(LED2, LOW)
}
if(distance>30){
    digitalWrite(LED3, HIGH)
}else{
    digitalWrite(LED3, LOW)
}
}

itu yang rangkaian nya R1 yang 1K bisa diganti sesuai kebutuhan, misalkan ganti 47k