Color 16 Click Board™

Product Code: MIKROE-5421

How Does The olor 16 Click Board™ Work? The Color 16 Click Board™ is based on the AS7343, a 14-channel multi-purpose spectral sensor from ams AG, providing fast and accurate spectral measurements. It is optimized for reflective (thanks to an onboard LDC red LED controlled through AN pin of the mikroBUS™ socket), transmissive, and emissive light applications, including colour matching, fluid or reagent analysis, lateral flow test applications, and spectral identification in the visible range. The AS7343 has a built-in aperture that controls the light entering the sensor array to increase accuracy. The spectral response is defined by individual channels covering approximately 380nm to 1000nm with 11 channels centred in the visible spectrum, one near-infrared, and a clear channel. The AS7343 features a 5x5 photodiode array. On top and below the photodiode array are two photodiodes with dedicated functions such as flicker detection and near-infrared response. In contrast, the array has a photodiode in each corner without filter responsive in the visible spectral range.

The AS7343 can detect 14 channels: 12 wavelengths, plus a clear and flicker output channel, making this Click board™ great for LED colour calibration, miniature optical spectrometers, and more. This sensor does not need a specific Power-Up sequence but requires a voltage of 1.8V for its interface and logic part to work correctly. Therefore, a small regulating LDO, the TLV700, provides a 1.8V out of 3.3V mikroBUS™ power rail. The Color 16 Click Board™ communicates with MCU using the standard I2C 2-Wire interface with a maximum clock frequency of 400kHz, fully adjustable through software registers. Since the sensor for operation requires a power supply of 1.8V, this Click board™ also features the PCA9306 and SN74LVC1T45 voltage-level translators. The I2C interface bus lines are routed to the voltage-level translators allowing this Click board™ to work with 3.3V MCU properly. Also, it uses an interrupt pin, the INT pin of the mikroBUS™ socket, used when an interrupt occurs to alert the system when the color result crosses upper or lower threshold settings. The Color 16 Click Board™ can only operate 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 Colour Sensing, Optical Applications It can be used for reflective, transmissive, and emissive light applications On-board modules AS7343 - multi-purpose spectral sensor from ams AG Key Features 14 optical channels distributed over the visible spectrum, near-infrared, and clear channel, dedicated functions such as flicker detection, high sensitivity, fast measurements, low power consumption, interrupt, 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 of the Color 16 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes LDC Control AN 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 LD2 LDC - Light So