View source for Arduino Infrared proximity switch module

==overview==
[[File:Infared proximity switch.jpg]]

Arduino infared proximity switch module is a reflection-type photoelectric sensor which integrates transmitting and receiving infared beams function. Infrared proximity switches work by sending out beams of invisible infrared light. A photodetector on the proximity switch detects any reflections of this light. These reflections allow infrared proximity switches to determine whether there is an object nearby.

==technical parameters==
*Voltage :DC 5V
*Current  :100mA
*Type :DC 3 Wire NPN-NO (Normal Open)
*Sensory Distance: 3-80 cm adjustable
*Sensory distance regulator and output indicator light on product back
*Control signal level:
*High：2.3V≤Vin≤5V 
*Low：-0.3V≤Vin≤1.5V

==Usage==
When sensor detect object, it output 0V. 
[[File:Infared proximity switch1.jpg]]

Example code
 int ledPin = 13; // choose pin for the LED
 int inputPin = 2; // choose input pin (for Infrared sensor)
 int val = 0; // variable for reading the pin status
 void setup() 
 {
 pinMode(ledPin, OUTPUT); // declare LED as output
 pinMode(inputPin, INPUT); // declare Infrared sensor as input
 }
 void loop(){
 val = digitalRead(inputPin); // read input value
 if (val == HIGH) { // check if the input is HIGH
 digitalWrite(ledPin, LOW); // turn LED OFF
 } else {
 digitalWrite(ledPin, HIGH); // turn LED ON
 }
 }


==How to buy it==
Click here to buy[http://www.geeetech.com/arduino-infrared-proximity-switch-module-p-205.html Infrared proximity switch module]