We all have surely observed that our phone display turns off during phone calls when we put it near our ears. So, do you ever wonder how does this happen???
It is not a hi-tech thing but a simple IR sensor to detect the obstacle near the phone we are also making the same project in this article, we are going to make an “Obstacle Detector” with an Infrared IR Sensor and ATmega328p Chip. This commonly used IR Sensor can also be used as Line Follower Robot we will discuss that later. Let’s start making it a simple Obstacle Detector.
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As the code in the setup section, we define the pin along with the type to which the sensor is connected and also initialize the pin and type for the led and buzzer.
In the loop section, we read the digital value on pin 2 of the microcontroller and according to the value, we apply conditions either 1 or 0 to turn the led and buzzer on or off. In the analog code in the loop section, we read the analog value i.e., 0-1023 values on pin A0 and according to the value of 200 or more, we turn the led and buzzer on or off.
Atmega328p Code
int val = 0 ;
void setup()
{
Serial.begin(9600); // sensor buart rate
pinMode(2,INPUT); // IR sensor output pin connected
pinMode(6,OUTPUT); // LED
pinMode(7,OUTPUT); // BUZZER
}
void loop()
{
val = digitalRead(2); // IR sensor output pin connected
Serial.println(val); // see the value in serial monitor in Arduino IDE
delay(500);
if(val == 1 )
{
digitalWrite(6,HIGH); // LED ON
digitalWrite(7,HIGH); // BUZZER ON
}
else
{
digitalWrite(6,LOW); // LED OFF
digitalWrite(7,LOW); // BUZZER OFF
}
}
