KY-005 Infrared IR Transmitter Module – 940nm for Arduino

KY-005 Infrared IR Transmitter Module – 940nm IR Emitter for Arduino

Buy the KY-005 Infrared IR Transmitter Module online in Pakistan from Robostan.pk. This compact infrared emitting module is designed for Arduino, ESP32, Raspberry Pi, remote control projects, robotics, and DIY electronic applications.

The KY-005 IR Transmitter features an infrared LED that emits invisible light at approximately 940nm. When driven with the appropriate digital signals, it can transmit infrared commands to compatible receivers used in televisions, air conditioners, audio equipment, and other remote-controlled devices.

With a compact PCB design and simple connection interface, the KY-005 is a practical option for experimenting with infrared communication, smart home automation, and microcontroller-based remote control systems.

Key Features

• KY-005 infrared transmitter module
• 940nm infrared LED emitter
• Supports commonly used 38kHz IR remote-control modulation
• Suitable for Arduino and compatible microcontrollers
• Can be used with ESP32 and Raspberry Pi with appropriate interfacing
• Compact PCB with three connection pins
• Compatible with suitable IRremote software libraries
• Useful for transmitting remote-control commands
• Supports short-range line-of-sight infrared communication
• Can be paired with a KY-022 IR receiver
• Suitable for DIY home automation projects
• Simple construction for educational electronics projects

Technical Specifications

• Product Name: KY-005 Infrared IR Transmitter Module
• Model: KY-005
• Alternative Designation: HW-489 on some versions
• Module Type: Infrared Transmitter / IR Emitter
• Emitter: Infrared Light-Emitting Diode
• Emission Wavelength: Approximately 940nm
• Typical LED Forward Voltage: Approximately 1.1V
• Typical LED Forward Current: 20mA
• Typical Controller Logic: 3.3V or 5V with appropriate current limiting
• Common IR Carrier Frequency: 38kHz, generated by the controller
• Communication: One-Way Infrared Transmission
• Connections: Three-Pin Interface
• Approximate PCB Size: 18.5 × 15mm, depending on version
• Output: Modulated Infrared Light
• Compatible Platforms: Arduino, ESP32, Raspberry Pi and Other Suitable Controllers

Applications

• Arduino infrared remote control projects
• DIY television remote transmitters
• Air conditioner control projects
• Smart home automation systems
• Infrared communication between microcontrollers
• Robotics and embedded electronics
• IR remote-control experiments
• Short-range optical communication
• IR transmitter and receiver demonstrations
• Educational Arduino starter projects
• Electronic switching through compatible IR receivers
• Wireless command transmission using infrared light

How Does the KY-005 Infrared Transmitter Work?

The KY-005 contains an infrared light-emitting diode that produces invisible infrared light when driven by an appropriate electrical signal.

A microcontroller can switch the IR LED rapidly to transmit modulated commands. Many consumer remote-control protocols use a carrier frequency around 38kHz.

By using compatible software libraries and correctly encoded signals, the KY-005 can transmit commands to suitable infrared receiver circuits.

Note: The KY-005 does not generate a 38kHz carrier automatically. The connected controller or driver circuit must provide the appropriate signal.

KY-005 and KY-022 Infrared Communication

The KY-005 can be paired with the KY-022 Infrared Receiver Module to create a simple infrared communication system.

• KY-005: Transmits infrared signals.
• KY-022: Receives compatible infrared signals.
• Microcontroller: Generates, interprets, and processes command data.

Using these modules together, students and developers can create basic infrared communication and remote-control projects.

Arduino Compatibility

The KY-005 is commonly used with Arduino UNO, Arduino Nano, Arduino Mega, and other compatible development boards.

Arduino's IRremote library supports transmission of several popular infrared remote-control protocols, including NEC and RC5.

The module can be connected to an appropriate microcontroller output through the required current-limiting arrangement.

The exact wiring depends on the KY-005 PCB version. Some boards include a provision for an onboard resistor, while others require an external series resistor.

Typical Current-Limiting Resistors

For KY-005 modules using the basic infrared LED configuration, common reference values are:

• 3.3V Logic: Approximately 120-ohm series resistor
• 5V Logic: Approximately 220-ohm series resistor

These values are reference recommendations for the documented LED configuration. Verify the actual module circuit and the microcontroller GPIO current limits before connecting.

Infrared Remote Control Applications

The KY-005 can be used to transmit appropriate commands to compatible devices that accept infrared remote-control signals.

Examples include selected televisions, audio receivers, air conditioners, and other appliances.

Compatibility depends on the receiving device's infrared protocol, carrier frequency, and command codes. Not every infrared-controlled appliance will respond to the same signals.

KY-005 vs KY-022

Although both modules are used for infrared communication, they have different functions:

• KY-005 IR Transmitter: Emits infrared light signals.
• KY-022 IR Receiver: Detects and demodulates compatible infrared remote-control signals.

The KY-005 is not an infrared obstacle sensor and cannot detect objects by itself.

Advantages of the KY-005

Compact Design: Easy to incorporate into small electronics projects.

Microcontroller Compatibility: Suitable for many Arduino and embedded development applications.

Infrared Communication: Enables short-range command transmission without radio-frequency hardware.

Educational Value: Useful for learning infrared modulation, communication protocols, and digital control.

Versatile Applications: Suitable for robotics, remote control projects, and smart home experiments.

Important Usage Notes

• The KY-005 is an infrared transmitter, not a receiver or distance sensor.
• Infrared radiation from the LED is invisible to the human eye.
• Use suitable current limiting to prevent LED damage.
• Check the actual module's pinout before connecting power.
• Do not assume the middle pin is VCC; some KY-005 versions have a different resistor and ground arrangement.
• Observe the current limits of your controller's GPIO pins.
• Use an appropriate transistor driver if the required LED current exceeds GPIO capability.
• Transmission range depends on LED drive current, alignment, ambient lighting, and receiver sensitivity.
• Infrared communication generally requires a clear optical path.
• A separate IR receiver module is required to receive commands.
• Do not stare directly into the infrared LED at close range.

Buy KY-005 IR Transmitter Module in Pakistan

Looking for a KY-005 Infrared IR Transmitter Sensor Module in Pakistan? Shop online at Robostan.pk for infrared transmitter modules, IR receivers, Arduino sensors, microcontrollers, robotics components, and electronic accessories.

The KY-005 is suitable for students, makers, electronics technicians, and developers working on remote-control and infrared communication projects.

Order your KY-005 IR Transmitter Module from Robostan.pk with nationwide delivery across Pakistan, including Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Peshawar, and other cities.

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