5mm IR LED Infrared Transmitter and Receiver Pair (TX-RX)

The 5mm IR LED Infrared Transmitter and Receiver Pair (TX-RX) is a compact and efficient infrared communication component designed for object detection, data transmission, and remote control applications. It includes a 5mm IR transmitting LED (TX) that emits invisible infrared light and a 5mm IR photodiode receiver (RX) that detects the reflected or modulated signals.

This TX-RX infrared pair is commonly used in line-following robots, infrared communication circuits, sensor-based automation, and security systems. The transmitter emits a focused IR beam while the receiver converts detected IR light into an electrical signal that can be processed by a microcontroller like Arduino or NodeMCU.

Its fast response time, low power consumption, and precise wavelength matching make it perfect for applications requiring reliable, real-time IR communication.

⚙️ Key Features & Highlights:

• 🔹 Matched TX & RX Pair – 5mm infrared LED and photodiode for accurate transmission and reception.

• ⚡ Fast Response Time – Ideal for high-speed infrared communication.

• 🔦 Invisible IR Light – Operates at 940nm wavelength without visible emission.

• 🧠 High Sensitivity Receiver – Detects even weak infrared reflections.

• 💡 Compact 5mm Package – Easy to integrate into any circuit or robotic design.

• 🔧 Low Power Operation – Energy-efficient for continuous use.

• 📡 Wide Range Detection – Suitable for both direct and reflective sensing.

• 🧰 Microcontroller Compatible – Works with Arduino, Raspberry Pi, ESP32, and NodeMCU.

⚙️ Technical Specifications:

⚙️ Working Principle:

The Infrared Transmitter (TX) emits light at 940nm wavelength, invisible to the human eye. The Infrared Receiver (RX) detects this IR light either through direct line-of-sight or reflected signals from an object. The RX converts the received light into an electrical signal, which is interpreted by Arduino or IoT controllers to perform specific actions such as obstacle detection, motion sensing, or remote control decoding.

For optimal performance, use the pair with appropriate resistors and, if needed, modulation circuits (e.g., 38kHz IR receivers for remote control systems).

⚙️ Applications & Use Cases:

• 🤖 Robotics & Automation – Line-following and obstacle-avoiding robots.

• 📡 Wireless Communication – Infrared data transmission between devices.

• 🧠 IoT Smart Devices – Remote-controlled automation and sensors.

• 🏠 Home Appliances – TV remotes, air conditioners, and smart lighting control.

• 🔒 Security Systems – Motion detection and IR barrier setups.

• ⚙️ DIY Electronics Projects – Ideal for beginners learning IR communication.

• 💻 Arduino Learning Kits – Integration with Arduino accessories and Electronics Components.

⚙️ Precautions:

• ⚠️ Avoid direct sunlight or strong light interference.

• ⚠️ Use a current-limiting resistor for the IR LED to prevent damage.

• ⚠️ Align the TX and RX properly for accurate detection.

• ⚠️ Do not exceed voltage or current ratings.

• ⚠️ Clean lenses regularly to maintain detection efficiency.

▶️ YouTube Tutorial Video:

Watch: How to Use IR Transmitter & Receiver Pair with Arduino

🔹 Internal Links:

• 🔗 Arduino Boards

• 🔗 NodeMCU IoT Modules

• 🔗 Electronics Components

• 🔗 Sensors & Modules

🔹 Product Summary:

The 5mm IR LED Infrared TX RX Transmitter Receiver Pair is a versatile and efficient component designed for infrared communication, object detection, and automation projects. With its fast response, compact design, and excellent compatibility with Arduino and IoT platforms, it is ideal for robotics, wireless control, and DIY electronic systems.

Whether you’re building a smart sensor, line-tracking robot, or IR-controlled device, this TX-RX pair delivers reliable and accurate performance.