1/*
2'DISTANCE SENSOR:
3Vcc goes to 5V on arduino
4Gnd goes to ground pin on arduino.
5Trigger goes to pin 8 on the arduino.
6Echo goes to pin 9 on the arduino.
78BUZZER:
9Positive leg goes to pin 12 on the arduino.
10Negative leg goes to GND on arduino.
11*/12int trigPin =8;13int echoPin =9;141516voidsetup(){17pinMode(trigPin,OUTPUT);18pinMode(echoPin,INPUT);19delay(100);20}2122voidloop(){2324digitalWrite(trigPin,LOW);25delayMicroseconds(5);26digitalWrite(trigPin,HIGH);27delayMicroseconds(10);28digitalWrite(trigPin,LOW);2930 int duration =pulseIn(echoPin,HIGH);31delay(50);3233if(duration <=600){34tone(12,2000,3000);35}3637else{38noTone(12);3940}41}