IR Proximity Sensor Interfacing with Arduino: A Comprehensive Guide

In this article, we will explore the interfacing of an IR proximity sensor with an Arduino board, a popular microcontroller platform. We will also discuss how to calibrate the program and determine the threshold at which the Arduino must switch on the light.

The IR proximity sensor is a type of non-contact sensor that uses infrared (IR) light to detect the presence of nearby objects. It consists of two components: an IR LED and a photo transistor. The IR LED emits IR light, which is then detected by the photo transistor. The output of the photo transistor is given to an operational amplifier IC like LM358 for proper amplification.

Interfacing the Proximity Sensor with Arduino

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To interface the proximity sensor with Arduino, we need to connect the V pin of the sensor to the 5V pin of the Arduino board and the GND pin of the sensor to the corresponding GND pin of the Arduino board. The OUT pin of the sensor is connected to an analog input of the Arduino board.

Calibration of the Proximity Sensor

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To calibrate the proximity sensor, we need to upload a calibration program to the Arduino board. This program will determine the threshold at which the Arduino must switch on the light. The front side of the proximity sensor acts as a positive counter and the one in the back side acts as a negative counter, counting how many people have entered and left.

In our example, we have mounted two proximity sensors just below the handle of a door so that when a person opens the door using the handle, the proximity sensor shows a change in its output level. The OUT pin is connected to an analog input of Arduino.

Sensitivity Adjustments

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The blue box with the screw is used for sensitivity adjustments. By adjusting this screw, we can adjust the sensitivity of the proximity sensor.

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In this article, we have discussed the interfacing of an IR proximity sensor with an Arduino board and how to calibrate it. We have also highlighted the importance of choosing the right type of proximity sensor based on the target material. A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact.

Ir proximity sensor proteus