Ambient 16 Click Board™

Product Code: MIKROE-4933

How Does The Ambient 16 Click Board™ Work? The Ambient 16 Click Board™ as its foundation uses the BH1726NUC, a 16-bit digital-output ambient light sensor from Rohm Semiconductor. The BH1726NUC can detect a wide range of illuminance up to 30Klx and provides an excellent responsivity close to the response of human eyes. It also has stable performance over a wide temperature range of -40°C to 85°C, and a voltage range suitable to measure the amount of the present ambient light. The BH1726NUC is designed to control the brightness in various applications based on ambient light availability, brightness for optimum visibility, and energy efficiency. This IC can change its ambient-light sensitivity used to compensate for the effect of attenuation by the optical window. Adjustment is made by changing the measurement time. For example, when the transmission rate of the optical window is 1/n (measurement result becomes 1/n times if the optical window is set), the effect of the optical window is compensated by changing sensor sensitivity from default to n times.

The Ambient 16 Click Board™ communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting Standard Mode operation with a clock frequency of 100kHz and Fast Mode up to 400kHz. Besides, the BH1726NUC allows choosing the least significant bit (LSB) of its I2C slave address using the SMD jumper labeled ADDR SEL. It also possesses an additional interrupt signal, routed on the INT pin of the mikroBUS™ socket labeled as INT, indicating when a specific interrupt event occurs. The Ambient 16 Click Board™ can be operated only 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 Type Optical Applications Can be used for obtaining ambient light data for adjusting brightness in applications that require power saving and better visibility On-board modules BH1726NUC - 16-bit digital-output ambient light sensor from Rohm Semiconductor Key Features Low power consumption, corresponds to a dark window because of high sensitivity, close responsivity to the human eye, I2C interface with selectable slave address, wide illumination range, stable performance over temperature and voltage, and more Interface I2C Compatibility mikroBUS Click board size S (28.6 x 25.4 mm) Input Voltage 3.3V PINOUT DIAGRAM This table shows how the pinout for the Ambient 16 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes NC 1 AN PWM 16 NC NC 2 RST INT 15 INT Interrupt NC 3 CS RX 14 NC NC 4 SCK TX 13 NC NC 5 MISO SCL 12 SCL I2C Clock NC 6 MOSI SDA 11 SDA I2C Data Power Supply 3.3V 7 3.3V 5V 10 NC Ground GND 8 GND GND 9 GND Ground ONBOARD SETTINGS AND INDICATORS Label Name Default Description LD1 PWR - Power LED Indicator JP1 ADDR SEL Left I2C Address Selection 0/1: Left position 0, Right position 1 AMBIENT 16 CLICK ELECTRICAL SPECIFICATIONS Description Min Typ Max Unit Supply Voltage - 3.3 - V Illuminance Measurement Range 0 - 30.000 Ix Sen