Infrared Transmitter Module KY-005

Description

The IR Emitter Module emits infrared (IR) as is commonly used for creating an IR remote control or IR intrusion sensor.

Infrared is the light spectrum up to around 940 nm that is commonly used for IR remotes and is outside the visible spectrum for the human eye.

The module is easy to use.  Hook up ground, then apply a logic HIGH to the ‘S’ input pin, to activate the LED.  The input pin does need a series current limiting resistor to avoid possible damage to the device or any MCU being used to drive it.  A resistance of approximately 220 ohm for 5V or 120 ohm for 3.3V operation should work OK.

Unfortunately, since the IR light is not visible to the human eye, it will appear that the module is doing nothing so you will need something that is sensitive to IR light to detect that the module is actually operating.  The camera on a cell phone is more sensitive to IR light, so if you view the module through your phone camera, you should be able to see it operating and it will have a pinkish/purple glow.  You can of course also use our IR Receiver module for detecting the IR as well.

The IR is typically pulsed at a modulated rate of 38kHz to create coded messages when it is being used as an IR remote control for something like a TV.  Different manufacturers have different transmission protocols for these coded messages.  There is a library that can be used with Arduino called IRRemote if you are looking to create a standard remote control.

The IR emitter can also be used as part of an emitter/detector pair where an object is detected if it breaks the beam between the two.  In this case, the IR emitter is driven all the time rather than being pulsed.

Connection Diagram

Technical Specifications: