This document provides application notes for Everlight infrared receiver modules, covering supported protocols, carrier frequencies, timing requirements…
This application note introduces the Infrared Receiver Module (IRM) used in remote control systems. It explains that to avoid visible light discomfort and interference from artificial sources, these modules typically operate at an invisible 940nm wavelength with a common carrier frequency of 38kHz.
The document details supported communication protocols including NEC, Sony, Panasonic, Toshiba, RC5, RC6, XMP, r-step, Mitsubishi, Sharp, and JVC. It specifies timing requirements for custom protocols, such as minimum burst length (10 cycles) and data pause time (22ms), and discusses factors affecting reception distance like pulse width variation and interference from Wi-Fi or sunlight. This manual is written in Chinese.
The text states that 38kHz is the most common carrier frequency.
Yes, it can receive protocols at 36kHz or 40kHz, though the reception distance will be shorter.
The module requires a minimum data pause time of 22ms.