How to interface an IR sensor with an Arduino?

Are you interested in learning about how to interface an IR sensor with an Arduino? In this post, we’ll go over the basics of what an IR sensor is, how it works, and how to connect it to an Arduino to create your own projects.

First, let’s talk about what an IR sensor is. IR stands for infrared, which is a type of electromagnetic radiation that is invisible to the human eye. An IR sensor is a device that detects this radiation and converts it into an electrical signal that can be processed by a microcontroller, like an Arduino.

There are different types of IR sensors available, but the most common one is the IR receiver module. This module has a photodiode that detects IR radiation and a preamplifier that amplifies the electrical signal produced by the photodiode. The output of the module is a digital signal that can be interpreted by the Arduino.

Now, let’s see how we can connect the IR receiver module to an Arduino. The module has three pins: VCC, GND, and OUT. VCC should be connected to the 5V pin on the Arduino, GND should be connected to the GND pin, and OUT should be connected to a digital input pin, like pin 2.

To read the signal from the module, we can use the Arduino’s built-in pulseIn() function. This function measures the duration of a pulse in microseconds and returns the value as an integer. We can use this value to determine the type of IR signal that was received.

For example, if we want to detect signals from a TV remote control, we can use the pulseIn() function to measure the duration of the pulse and compare it to the known values for each button on the remote. We can then use the Arduino to perform an action based on which button was pressed.

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