The KY-022 has three pins and responds to a carrier frequency of 38kHz at 940nm. This signal is sent to the digital output. An LED module on the board will flash if an IR signal is detected.
This sensor module is perfect for decoding remote controls for home audio/visual equipment (home theater) and other types of remote controls that use IR.
Specifications:
Chip type: VS1838B Operating Voltage: 3.3V to 5V Current Consumption: 1.5mA peak Reception distance: 17m Carrier Frequency: 37.9kHz Infrared Wavelength: 940 nm Pulse Duration: 400s to 800s Dimensions: .87in X .35in (22mm x 9mm)