IR Proxity Sensor Using Arduino

Introduction

IR Proximity Sensor:

• The IR Proximity sensor is to perceiver occurrence of any object without begin in contact with-it.
  
• It senses the accurate distance of a particular object.
  
• It will emit electromagnetic radiation.
  
  
  Figure1: IR sensor

IR LED Emitter:

• It will also emit the light.
• When the object occur it will produce light
  
  
  Figure 2: IR Emitter

Parts Of List:

• Arduino uno
• IR Led Receiver
• IR Emitter
• Bread Board
• Hookup Wires
• Buzzer

Connection

Step 1: Fix the IR Receiver in the bread board.
Step 2: Fix the IR Emitter 4 in the bread board.

Connection Of Bread Board To Arduino:

Step 1: Take the IR Receiver Gnd pin to the Analog pin A0, then Vcc to the Digital pin 02.
Step 2: Take the IR Emitter connect the Gnd pins commonly then Vcc pins commonly.
Step 3: Connect to the Arduino uno board.
Step 4: Fix the buzzer in Arduino board.

Program:

int IRpin = A0; // IR photodiode on analog pin A0
int IRemitter = 2; // IR emitter LED on digital pin 2
int ambientIR; // variable to store the IR coming from the ambient
int obstacleIR; // variable to store the IR coming from the object
int value[10]; // variable to store the IR values
int distance; // variable that will tell if there is an obstacle or not
void setup()
{
    Serial.begin(9600); // initializing Serial monitor
    pinMode(IRemitter, OUTPUT); // IR emitter LED on digital pin 2
    digitalWrite(IRemitter, LOW); // setup IR LED as off
    pinMode(11, OUTPUT); // buzzer in digital pin 11
}
void loop()
{
    distance = readIR(5); // calling the function that will read the distance and passing the "accuracy" to it
    Serial.println(distance); // writing the read value on Serial monitor
    // buzzer(); // uncomment to activate the buzzer function
}
int readIR(int times)
{
    for (int x = 0; x < times; x++)
    {
        digitalWrite(IRemitter, LOW); //turning the IR LEDs off to read the IR coming from the ambient
        delay(1); // minimum delay necessary to read values
        ambientIR = analogRead(IRpin); // storing IR coming from the ambient
        digitalWrite(IRemitter, HIGH); //turning the IR LEDs on to read the IR coming from the obstacle
        delay(1); // minimum delay necessary to read values
        obstacleIR = analogRead(IRpin); // storing IR coming from the obstacle
        value[x] = ambientIR - obstacleIR; // calculating changes in IR values and storing it for future average
    }
    for (int x = 0; x < times; x++) { // calculating the average based on the "accuracy"
        distance += value[x];
    }
    return (distance / times); // return the final value
}
void buzzer()
{
    if (distance > 1)
    {
        if (distance > 100)
        {
            digitalWrite(11, HIGH);
        } else
        {
            digitalWrite(11, HIGH);
            delay(150 - distance); // adjust this value for your convenience
            digitalWrite(11, LOW);
            delay(150 - distance); // adjust this value for your convenience
        }
    } else
    {
        digitalWrite(11, LOW);
    }
}

Explanation:

• In this article it can be used to detect the object at a particular distance.
• It can display the distance of an object in the Serial Monitor accurately.
• If they have the signal of the object it will produce the sound when it reaches the signal.
  
  
              Figure 3: Output

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• Introduction to Arduino 
• Getting Familiar With Arduino IDE
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