ULTRASONIC SENSOR PROXIMITY
In this tutorial we will show you how Ultra Sensor Works with Arduino UNO / Nano.
COMPONENTS USED :
| SR NO | COMPONENT NAME | QUANTITY |
| 1 | Arduino Board(Uno or Nano) | 1 |
| 2 | BreadBoard | 1 |
| 3 | Resistor(220 ohm) | 9 |
| 4 | Ultrasonic Sensor | 1 |
| 5 | Jumper Cbles(male to Female) | 1 set |
| 6 | LEDs (5mm) | 9 |
| 7 | 16X2 LCD | 1 |
Schematic Diagram :
Source Code:
#define trigPin 8
#define echoPin 7
#define led 13
#define led2 12
#define led3 11
#define led4 10
#define led5 9
#define led6 6
#define led7 5
#define led8 4
#define led9 2
#define buzzer 3
int sound = 230;
void setup() {
Serial.begin (9600);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
pinMode(led, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);
pinMode(led4, OUTPUT);
pinMode(led5, OUTPUT);
pinMode(led6, OUTPUT);
pinMode(led7, OUTPUT);
pinMode(led8, OUTPUT);
pinMode(led9, OUTPUT);
pinMode(buzzer, OUTPUT);
}
void lop() {
long duration, distance;
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(5);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;
if (distance <= 45) {
digitalWrite(led, HIGH);
sound = 230;
}
else {
digitalWrite(led,LOW);
}
if (distance < 40) {
digitalWrite(led2, HIGH);
sound = 240;
}
else {
digitalWrite(led2, LOW);
}
if (distance < 35) {
digitalWrite(led3, HIGH);
sound = 250;
}
else {
digitalWrite(led3, LOW);
}
if (distance < 30) {
digitalWrite(led4, HIGH);
sound = 260;
}
else {
digitalWrite(led4,LOW);
}
if (distance < 25) {
digitalWrite(led5, HIGH);
sound = 270;
}
else {
digitalWrite(led5,LOW);
}
if (distance < 20) {
digitalWrite(led6, HIGH);
sound = 280;
}
else {
digitalWrite(led6,LOW);
}
if (distance < 15) {
digitalWrite(led7, HIGH);
sound = 290;
}
else {
digitalWrite(led7,LOW);
}
if (distance < 10) {
digitalWrite(led8, HIGH);
sound = 300;
}
else {
digitalWrite(led8,LOW);
}
if (distance < 5) {
digitalWrite(led9, HIGH);
sound = 310;
}
else {
digitalWrite(led9,LOW);
}
if (distance > 45 || distance <= 0){
Serial.println(“Out of range”);
noTone(buzzer);
}
else {
Serial.print(distance);
Serial.println(” cm”);
tone(buzzer, sound);
}
delay(500);
}
Video:
