The SparkFun Triad Spectroscopy Sensor combines three AS7265x spectral sensors with onboard UV, visible, and IR LEDs to measure light across 18 individual frequencies — from 410 nm (UV) to 940 nm (IR). It brings light spectroscopy to the desktop, allowing you to measure and characterise how different materials absorb and reflect light.

The sensor communicates over I2C (Qwiic) by default or via serial at 115,200 bps with an AT command set. An Arduino library is available for easy integration, and the Qwiic connector provides solderless plug-and-play wiring. Standard 0.1" header pins are also broken out for breadboard use.

Key Features

• 18-Channel Spectral Measurement – 410 nm (UV) to 940 nm (IR)
• Three Sensor ICs – AS72651, AS72652, and AS72653 combined on one board
• Onboard Illumination – UV, visible, and IR LEDs for active spectroscopy
• High Precision – Down to 28.6 nW/cm² with ±12% accuracy
• Qwiic I2C Interface – Solderless, polarised connector for easy hookup
• Serial Interface – 115,200 bps with AT command set
• Arduino Library – Full-featured library for readings and LED control

Specifications

• Sensor ICs: AS72651 + AS72652 + AS72653
• Spectral Range: 410–940 nm (18 channels)
• Precision: 28.6 nW/cm²
• Accuracy: ±12%
• Interfaces: I2C (Qwiic) / Serial (115,200 bps)
• Header Pins: 0.1" spaced for breadboard use

Ideal For

• Light spectroscopy and material analysis
• Colour matching and quality control
• Environmental and agricultural sensing
• Educational spectroscopy experiments

Package Contents

• 1× SparkFun Triad Spectroscopy Sensor (AS7265x, Qwiic)

Resources

• Hookup Guide (SparkFun Learn)