HOW DOES IT WORK?

Ambient 23 Click is based on the VEML3235SL, a high-accuracy light-to-digital converter from Vishay Semiconductors that transforms light intensity into a digital output signal. The VEML3235SL includes a highly sensitive photodiode, low noise amplifier, and 16-bit A/D converter and supports an easy-to-use serial communication interface. The ambient light read-out is available as a digital value, and the built-in photodiode response is near the human eye's. The 16-bit dynamic range for ambient light detection is from 0.0021 to 17.867lx, with resolution down to 0.0021lx/counts. The sensor's remarkable sensitivity of 0.0021lx enables it to operate even when placed behind dark cover glass that significantly blocks light. Still, it can also function behind transparent cover glass, as it can handle high illumination levels up to approximately 18klx without saturation.

This Click board™ communicates with the host MCU using the standard I2C 2-Wire interface supporting Standard Mode operation with a clock frequency of 100kHz and Fast Mode up to 400kHz. All operations are controlled by the command register, allowing users to easily program the operation setting and latch the light data from VEML3235SL. In addition to its outstanding temperature compensation capabilities, the VEML3235SL also offers the added benefit of software shutdown mode control, allowing for random measurements, such as once per second, during which the sensor can be switched to shutdown mode to minimize power consumption.

This Click board™ can only be operated with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used as a reference for further development.

SPECIFICATIONS