Infrared Transmitter Module
A KY-005 infrared transmitter module emits invisible infrared light, usually for remote-control style signals.
Part images
What it is
A KY-005 infrared transmitter module emits invisible infrared light, usually for remote-control style signals.
How students use it
Students use it to send IR commands, build paired IR transmitter/receiver experiments, and learn pulse timing.
Pins and power
S signal input, VCC, and GND.
KY-005 modules usually use VCC, GND, and a digital signal input. Confirm the module voltage before wiring.
The signal pin is pulsed by code. IR protocols usually require fast bursts around a carrier frequency such as 38 kHz.
Voltage and safety
Keep the signal input Pico-safe. Do not drive the LED directly from GPIO without the module's current limiting.
Do not stare into IR emitters at close range. Keep power low and aimed away from faces.
Module internals
Main component: Infrared LED emitter.
IR LED, resistor/support components, three-pin header, and module PCB.
Datasheet notes
The LED is invisible to human eyes, so debug with a camera or a receiver instead of staring at the emitter.
Common libraries
Use machine.Pin or a MicroPython IR library when generating remote-control protocol pulses.
Common mistakes
Expecting visible light, missing the carrier timing, reversing VCC/GND, and testing without line of sight.