SparkFun Spectroscopy Sensor - Qwiic

The SparkFun Triad Spectroscopy Sensor is a powerful optical inspection sensor also known as a spectrophotometer. Three AS7265x spectral sensors are combined alongside a visible, UV, and IR LEDs to illuminate and test various surfaces for light spectroscopy. The Triad is made up of three sensors; the AS72651, the AS72652, and the AS72653 and can detect the light from 410nm (UV) to 940nm (IR). In addition, 18 individual light frequencies can be measured with precision down to 28.6 nW/cm2 and accuracy of +/-12%. Utilizing Sparkfuns' handy Qwiic system, no soldering is required to connect it to the rest of your system. However, SparkFun have still broken out 0.1"-spaced pins in case you prefer to use a breadboard.

The SparkFun Triad Spectroscopy Sensor communicates over I2C by default or over 115200bps serial. SparkFun have written a fully formed Arduino library to access all the various features include taking readings and illuminating LEDs all over the Qwiic I2C interface. In addition, the Triad can be setup to communicate over serial. The serial interface uses an AT command set.

What can you do with light spectroscopy? It’s an amazing field of study, and the SparkFun Triad brings what used to be prohibitively expensive equipment to the desktop. The AS7265x should not be confused with highly complex photon spectrometers, but the sensor array does give the user the ability to measure and characterize how different materials absorb and reflect 18 different frequencies of light.

Product Video

Quick Spec

• Selectable interface: I2C or Serial (115200bps)
• 18 frequencies of light sensing from 410nm to 940nm
• 28.6 nW/cm2 per count
• Accuracy of +/-12%
• Integrated 405nm UV, 5700k White, and 875nm IR LEDs
• Software control over each illumination LED as well as current control
• Optional external bulb or illumination control
• Programmed with latest firmware from AMS

18 Channel Spectral Response

Resources

• Product Page
• Schematic
• Getting Started
• AS7265x Datasheet
• White LED (DS208) Datasheet
• IR LED (SIR19-21C/TR8) Datasheet
• UV LED (VLMU3100) Datasheet
• SparkFun AS7265x Arduino Library (Search for SparkFun Spectral in the the Arduino library manager)
• GitHub

Shipping List

• 1 x SparkFun Spectroscopy Sensor - Qwiic