Description The Grove Digital Light Sensor is a compact light sensing module based on the TSL2561 I2C light-to-digital converter. It converts light intensity into a digital signal and supports selectable infrared, full-spectrum, and human visible sensing modes, making it useful for projects that need more precise ambient light data than a simple analog photoresistor can provide. The module works with Grove plug-and-play wiring and offers 16-bit digital output, 400 kHz I2C Fast Mode communication, a wide 0.1 to 40,000 lux dynamic range, and a programmable interrupt function with user-defined upper and lower thresholds. Features Selectable infrared, full-spectrum, and human visible detection modes 16-bit digital output through an I2C interface Supports 400 kHz I2C Fast Mode communication 0.1 to 40,000 lux dynamic measurement range Programmable interrupt function with upper and lower threshold settings Grove connector for quick prototyping with compatible development boards Applications Ambient light sensing Display or panel backlight control Keyboard illumination control Lighting-aware Arduino and microcontroller projects Specifications Dimensions 24 mm x 20 mm x 9.8 mm Gross Weight 8 g Battery Exclude Supply Voltage 3.3 V to 5.1 V, 5 V typical Light Sensor TSL2561 light-to-digital converter Dynamic Range 0.1 to 40,000 lux Digital Output 16-bit Interface I2C, 400 kHz Fast Mode supported I2C Address 0x29 Module Operating Temperature -30°C to 70°C Hardware Overview U1: TSL2561 light-to-digital converter U3: XC6206MR332 voltage regulator Q1/Q2: BSN20 N-channel D-MOS transistors SCL/SDA: I2C signal interface Other Content For projects using multiple I2C devices, use a Software I2C setup if an address conflict occurs. Platform support is based on software or theoretical compatibility; Seeed provides Arduino examples, while other MCU platforms may require custom code. Part List Item Quantity Grove - Digital Light Sensor 1 ECCN/HTS HSCODE 9027900000 USHSCODE 9027908800 UPC 841454108528 EUHSCODE 8517180000 COO CHINA Resources Grove Digital Light Sensor Wiki Grove Digital Light Sensor Eagle design files Grove Digital Light Sensor schematic PDF Grove Digital Light Sensor PCB PDF Grove Digital Light Sensor Arduino library TSL2561T datasheet FAQ What sensing modes does this module support? It supports infrared, full-spectrum, and human visible light sensing modes. What interface does it use? It communicates over I2C and supports 400 kHz Fast Mode operation. Can it be used with multiple I2C devices? Yes, but if another device uses the same address, use a Software I2C setup or adjust the bus design. What is included in the package? The package includes one Grove - Digital Light Sensor module.
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