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AJMRTC GY-49 MAX44009 ambient light sensor module is a high-precision digital light intensity detector with I2C IIC communication interface. The MAX44009 chip delivers accurate ambient light readings while consuming very little power. It works within 1.7V to 3.6V supply voltage, which makes it perfectly suited for battery-operated embedded systems. Equipped with a 4-pin header, wiring and soldering are straightforward. The sensor supports a broad light measuring range and outputs digital data directly, eliminating extra analog conversion work. This module is commonly used for screen auto-brightness control, smart lighting systems, environmental light monitoring and maker DIY projects.