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Adafruit MAX44009 Wide-range Lux Light Sensor - 188,000 Lux Max - STEMMA QT / Qwiic
This is an easy to use lux sensor, and features an ultra-wide 22-bit dynamic range from 0.045
lux to 188,000 lux. That means you can use the Adafruit MAX44009 Wide-range Lux Sensor in darkness or in bright outdoors sun, without having to tweak the integration time or gain: the sensor will auto-range for you so you get smooth readings no matter the light level.
Most light sensors just give you a number for brighter/darker ambient lighting. The MAX44009 makes your life easier by calculating the lux, which is an SI unit for light. You'll get more consistent readings between multiple sensors because you aren't dealing with some unit-less values.
The sensor has 22-bit dynamic range for ambient light detection from 0.045 lux to about 188 klux with resolution down to 0.045 per least-significant-bit. It does come with software-adjustable integration times, or you can have it auto-range for you.
User Manual / Datasheet / Example Codes Etc.
Features
- Wide dynamic range ambient light sensor with measurement capability up to 188,000 lux.
- Uses the MAX44009 digital ambient light sensor IC.
- Digital I²C interface for easy connection to microcontrollers and development boards.
- Compatible with STEMMA QT / Qwiic ecosystem for quick, solder-free connections.
- Low-power operation, suitable for battery-powered projects.
- Automatic gain and integration-time adjustment for a wide range of lighting conditions.
- Suitable for measuring ambient light from low indoor illumination to bright outdoor environments.
- Compact breakout-board design for easy integration into prototypes and embedded projects.
- Useful for automatic brightness control, smart lighting, display adjustment, IoT devices, robotics, and environmental monitoring.
Specifications
- Sensor IC: MAX44009
- Sensor Type: Digital Ambient Light / Lux Sensor
- Maximum Measurable Illumination: Up to 188,000 lux
- Interface: I²C
- I²C Address: 0x4A / 0x4B
- Connector: STEMMA QT / Qwiic
- Measurement: Ambient light intensity
- Gain: Automatic
- Integration Time: Automatic
- Output: Digital lux reading
- Board Type: Breakout Board
- Applications: Light monitoring, IoT, robotics, automation, display control
Package Includes
- 1x Adafruit MAX44009 Wide-range Lux Light Sensor - 188,000 Lux Max - STEMMA QT / Qwiic
