5mm IR Transmitter Receiver Pair

5mm IR Transmitter Receiver Pair

Infrared Communication Object Detection Wireless Signal Transfer

The 5mm IR Transmitter and Receiver Pair is a basic infrared sensing component set used in many electronics, robotics, and automation projects. The pair consists of an infrared LED (transmitter) that emits invisible IR light and a photodiode or phototransistor (receiver) that detects the reflected or transmitted infrared light.

These components operate in the infrared wavelength range (~940 nm) and are commonly used in remote control systems, obstacle detection sensors, and line-following robots.

Infographic Overview

Basic Specifications

Components in the Pair

Working Principle

The pair works using infrared light transmission and detection.

Step-by-Step Operation

1 The IR LED transmitter emits infrared light.reflects back.4 The IR receiver detects the reflected IR signal.5 The signal can be processed by a microcontroller or sensor circuit.

Basic Working Diagram

IR Sensor PairIR Transmitter IR Receiver(IR LED) (Photodiode) Infrared Light

Common Applications

TV remote control systems Obstacle detection robots Line follower robots Automatic door sensors Object counting systems Security detection sRaspberry Pi

Usually combined with resistors, comparators, or amplifier circuits to create sensor modules.

Advantages

Simple and low-cost sensor solution Small size and lightweight Low power consumption Fast response time Easy integration in circuits

Limitations

Performance affected by strong sunlight Limited detection distance Requires additional circuitry for stable output

Example DIY Project

Obstacle Detection Robot

Components

• 5mm IR Transmitter Receiver Pair

• Arduino Uno

• Motor driver

• Robot chassis

Working

IR LED emits infrared light If obstacle is detected