Gravity: Digital Adjustable Infrared Proximity
Sensor for Arduino (0~200 cm)
This is an Arduino digital infrared distance sensor. It has an adjustable detection range, 0cm -
200cm. It is small, easy to use, assemble, and inexpensive.
Useful for robotics, interactive media, industrial assembly line, etc. Infrared wave length is part of the
Sun's natural light spectrum. While is a nice fit for indoor projects, outdoors with plenty of sun light
and reflective surfaces on it's sight is not adviced. It's incredibly repurposable and can be used for a
lot of different projects. The adjustable screw on it's back makes it very convenient for different
purposes. Digital read on your Arduino pin and you are ready to go. Good sensor choice for quick
prototyping.
Use it on a robot for wall detection and wall follower, or as some of the projects listed below as a
trigger system. It's round shape with the screwable holders make it a good choice for a home made
assembled robot, with a hole of it's diameter and the holders you can place it aiming at different
positions on a robot. Or even place it near your PC to turn on and off your monitor.
To ease the difficult of using this sensor, a Gravity Interface is adapted to allow plug&play. The IO
expansion shield is the best match for this sound senor connecting to your Arduino.
principle
Light is an electromagnetic radiation that behaves like radio waves and X-rays at speeds of about
300,000 km / s so that it can be received by the moment it is launched. Infrared photoelectric switch
is the use of human invisible (wavelength 780nm-1mm) near infrared and infrared to detect,
determine the object. A feeble beam that is instantaneously transmitted by the optoelectronic device
can be transmitted and received safely and reliably.
Infrared photoelectric switch is important to be able to handle the intensity of light changes: it use
optical components in the media to make changes in the beam; the use of light to reflect objects;
make the beam emission after a long distance back instantly. Infrared photoelectric switch is
composed of transmitter, receiver and detection circuit of three parts. The emitter is aimed at the
target emission beam and the emitted beam is typically derived from a light emitting diode (LED) and
a laser diode. The light beam is emitted continuously or the pulse width is changed. The intensity of
the pulsed beam of radiation is selected multiple times during launch, running indirectly toward the
target. The receiver has a photodiode or a phototriode. In front of the receiver, it is equipped with
optical components such as lenses and apertures. Connecting downstream is the detection circuit,
which filters out the valid signal and applies the signal.
Specification
Output Form: PNP normally open
Signal Type: Digital signal
Operating Voltage: 3~5V
Interface: XH2.54-3Pin
Detection range: 0~200 cm
Switch Level: 0,No obstacles in the area; 1, There are obstacles in the area.
Operating Temperature: -15~60
Temperature Effect: Within -15 to + 60 , the detection distance is below 10% at + 25
Storage Temperature: -25~75
Humidity: 35% ~ 95% RH
Size: 75 *
Φ18
mm
Board Overview
Gravity: Digital Adjustable Infrared Proximity Sensor for Arduino (0~200 cm)
Num
Blue
Yellow
Black
Label
D
VCC
GND
Description
Digital signal
3~5V
GND
Tutorial
Connection Diagram
Sample Code
const int InfraredSensorPin = 4;//Connect the signal pin to the digital pin 4
const int LedDisp = 13;
void setup()
{
Serial.begin(57600);
Serial.println("Start!");
pinMode(InfraredSensorPin,INPUT);
pinMode(LedDisp,OUTPUT);
digitalWrite(LedDisp,LOW);
}
void loop()
{
if(digitalRead(InfraredSensorPin) == LOW)
else
digitalWrite(LedDisp,LOW);
digitalWrite(LedDisp,HIGH);
Serial.print("Infrared Switch Status:");
Serial.println(digitalRead(InfraredSensorPin),BIN);
delay(50);
}
Result
Cover the sensor head with your hand, the LED(Pin13) on board will light up, hold it toward an open
area, the LED will be off. Open Arduino IDE serial monitor, you can also get the Infrared sensor
status.
https://www.dfrobot.com/product‐1653.html 12‐8‐17
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