VEML6075 UVA and UVB Light Sensor Module with I2C Interface and 16-Bit Resolution

The VEML6075 is a digital UV sensor module that measures both UVA and UVB light intensity through independent channels and converts the readings into 16-bit digital values over an I2C interface. Unlike sensors that infer UV exposure from visible-light measurements, this module integrates genuine UVA and UVB photodiodes, amplifiers, and an analog-to-digital converter on a single CMOS chip, providing direct and reliable UV data. The two channels cover the UVA band at approximately 365nm and the UVB band at approximately 330nm, with calibration registers that allow the host microcontroller to calculate the UV Index without external compensation tables. Operating from a 1.7V to 3.6V supply, this I2C UV sensor is compatible with 3.3V logic systems commonly used in portable electronics. The module includes temperature compensation across its -40°C to +85°C operating range, which helps maintain accuracy when ambient temperature changes. A compact CJMCU breakout board exposes the sensor’s I2C pins and power connections, making it straightforward to integrate with Arduino, ESP32, STM32, and other microcontroller platforms. Typical applications include handheld UV monitors, wearable sun-exposure trackers, notebook and consumer device ambient sensing, and industrial or medical UV measurement equipment. The VEML6075 UV sensor also supports configurable integration times and a shutdown mode for power-sensitive designs. Whether used in a personal UV dosimeter or a fixed outdoor UV monitoring station, this 16-bit UV module offers a practical combination of true dual-band sensing, digital output, and low-power operation.