A very cheap, easy to assemble, easy to use Infrared sensor with a long detection distance and has less interference by visible light. The implementations of modulated IR signal immune the sensor to the interferences caused by the normal light of a light bulb or the sun light. This sensor has a screwdriver adjustment to set the appropriate detected distance to make it useful in many applications, and then gives a digital output when it senses something within that range. This sensor does not measure a distance value. It can be used for collision avoidance robot and machine automation. The sensor provides a noncontact detection.
Pin configuration
Brown Wire – 5V to Arduino
Blue Wire – GND to Arduino
Black Wire – Pin 5 to Ardunio
/*E18-D80NK Infrared Distance Ranging Sensor*/
void setup() {
Serial.begin(9600); //Start serial communication boud rate at 9600
pinMode(5,INPUT); //Pin 5 as signal input
}
void loop() {
delay(500);
if(digitalRead(5)==LOW) {
Serial.println("Collision Detected.");
}
else
{
Serial.println("No Collision Detected.");
}
}
The below code acts like a race time sensor for laps. The LCD shield is used and the PIN for time sensor is moved to PIN 0 (instead of PIN 5 above).
First time the collision is detected, the lap timer starts. The next time there is a collision detection, the current timer is moved as ‘Prev’ and a new timer is started
#include <LiquidCrystal.h>
#include <Time.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
time_t elapsedTime=0, prevTime=0;
void setup() {
Serial.begin(9600); //Start serial communication boud rate at 9600
pinMode(0,INPUT); //Pin 5 as signal input
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
//lcd.setCursor(0,0);
//lcd.print("Prev Lap: ");
lcd.setCursor(0,1);
lcd.print("Curr Lap: ");
elapsedTime = -1;
setTime(elapsedTime);
}
void loop() {
delay(200);
if (elapsedTime != -1)
elapsedTime = now();
if(digitalRead(0)==LOW) {
if (elapsedTime != -1) {
prevTime=elapsedTime;
}
elapsedTime=0;
setTime(elapsedTime);
Serial.println("Collision Detected.");
} else {
Serial.println("No Collision Detected.");
}
if (elapsedTime != -1) {
lcd.setCursor(9,1);
lcd.print(second(elapsedTime));lcd.print(" ");
lcd.setCursor(9,0);
lcd.print(second(prevTime));lcd.print(" ");
}
}
Output
Sensor gives 0 when it detects any object in front of the sensor otherwise 1. It does show the distance of the object