Keyestudio Ks0428, Manual

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The 38K infrared carrier signal
emitted by remote controller is
encoded by the encoding chip
in the remote controller. It is
composed of a section of pilot
code, user code, user inverse
code, data code, and data inverse code. The time interval of the
pulse is used to distinguish whether it is a 0 or 1 signal and the
encoding is made up of these 0, 1 signals.
The user code of the same remote control is unchanged. The data
code can distinguish the key.
When the remote control button is pressed, the remote control
sends out an infrared carrier signal. When the IR receiver receives
the signal, the program will decode the carrier signal and
determines which key is pressed. The MCU decodes the received 01
signal, thereby judging what key is pressed by the remote control.
Infrared receiver we use is an infrared receiver module. Mainly
composed of an infrared receiver head, it is a device that integrates
reception, amplification, and demodulation. Its internal IC has
completed demodulation, and can achieve from infrared reception
to output and be compatible with TTL signals. Additionally, it is
suitable for infrared remote control and infrared data transmission.
The infrared receiving module made by the receiver has only three