433 MHz RF Receiver Learning Code Decoder Module (4 CH / 4-channel) is a small wireless radio receiver board used in remote-control and automation projects to receive and decode signals from 433 MHz RF (radio frequency) transmitters such as remote controls.
Specifications
433 MHz RF Receiver: Picks up radio signals sent at ~433 MHz.
Learning-Code Decoder: It can “learn” the code from compatible 433 MHz transmitters (typically using EV1527 or PT1527 encoding), so the receiver will only respond to those specific transmitters you’ve paired with it.
4 Output Channels: The module has four digital output lines (often labeled D0–D3) that correspond to the four buttons on the paired remote — each channel can be used to control a different function or piece of hardware.
Operating Voltage: Usually runs from ~3.3 V to 5 V DC.
Low Power: It draws only a few milliamps at idle.
Modes: Many boards support different activation modes like momentary, toggle/self-locking, or interlocking depending on how you configure them during pairing.