Description
The KL-CW11 433MHz RF receiver module implements a superheterodyne circuit design, providing enhanced selectivity and interference rejection compared to simpler regenerative receivers. This architecture contributes to its high sensitivity of -106dBm, enabling reliable reception over distances typical for remote control and telemetry applications.
Operating on a 3-5V DC supply with a modest 4mA current draw, the module is engineered for low-power IoT and embedded systems. Its digital output provides the raw, ASK/OOK-modulated signal, which must be decoded by an external microcontroller using dedicated libraries or a hardware decoder like the HT12D. The onboard variable node allows for fine-tuning the receive frequency, accommodating slight variances between transmitter and receiver crystals.
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