SparkFun Triad Spectroscopy Sensor - AS7265x (Qwiic)

The SparkFun Triad Spectroscopy Sensor is a powerful optical inspection sensor. 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 our handy Qwiic system, no soldering is required to connect it to the rest of your system. However, we still have 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. We’ve 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. We’ve also written a full Arduino library that makes reading and interacting with the Triad simple and easy!

The SparkFun Qwiic Connect System is an ecosystem of I2C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.

Get Started with the SparkFun Triad Spectral Sensor

  • 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

SparkFun Triad Spectroscopy Sensor - AS7265x (Qwiic) Product Help and Resources


Spectral Triad (AS7265x) Hookup Guide

November 8, 2018

Learn how to wield the power of 18 channels of UV to NIR spectroscopy with AS72651 (UV), AS72652 (VIS), and AS72653 (NIR) sensors!

Core Skill: Programming

If a board needs code or communicates somehow, you're going to need to know how to program or interface with it. The programming skill is all about communication and code.

3 Programming

Skill Level: Competent - The toolchain for programming is a bit more complex and will examples may not be explicitly provided for you. You will be required to have a fundamental knowledge of programming and be required to provide your own code. You may need to modify existing libraries or code to work with your specific hardware. Sensor and hardware interfaces will be SPI or I2C.
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Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

2 Electrical Prototyping

Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
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Customer Comments

  • This is an exciting tool!

    But please consider changing the phrase “highly complex mass spectrometers” to “highly complex photon spectrometers”. Mass spectrometers use magnetic fields and the velocity of accelerated ions to determine mass. As photons are without mass, photon spectrometers utilize the wavelength to diverge the light based on energy. Sorry to pick at nits.


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