const int triggerPin = 8; const int echoPin = 7; const int LED1 = 4; int buzzer = 3; long durasi; int jarak; void setup() { pinMode (triggerPin, OUTPUT); pinMode (LED1, OUTPUT); pinMode (buzzer, OUTPUT); pinMode (echoPin, INPUT); Serial.begin (9600); } void loop() { digitalWrite(triggerPin, LOW); delayMicroseconds (2); digitalwrite(triggerPin, HIGH); delayMicroseconds (10); digitalWrite(triggerPin, LOW); durasi = pulseIn(echoPin, HIGH); jarak = durasi*0.034/2; if(jarak <= 10){ Serial.println("Jarak dekat"); digitalwrite(LED1, HIGH); digitalwrite (buzzer, HIGH); delay (2000);

void setup() {
  // put your setup code here, to run once: