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). The SparkFun Triad Spectroscopy Sensor is a powerful optical inspection sensor also known as aspectrophotometer. The SparkFun Triad Spectroscopy Sensor communicates over I2C by default or over 115200bps serial.
STEMMA QT / Qwiic 4-pin 1mm Pitch White Female Connector Cable 150mm Long – Both Sidecan be purchased seperately.
Resources
Schematic
Eagle Files
Hookup Guide
Datasheets
AS7265x(Pin assignments are misleading; use Design Considerations below.)
Design Considerations
White LED
IR LED
UV LED
SparkFun AS7265x Arduino Library- Search forSparkFun Spectralin the the Arduino library manager
GitHub

FAQs:

Q: What does the SparkFun Triad Spectroscopy Sensor measure?
A: The sensor measures light intensity across 18 distinct spectral channels ranging from 410nm (ultraviolet) to 940nm (infrared), providing detailed spectral analysis.
Q: What are the applications of this spectroscopy sensor?
A: The sensor finds applications in various fields including color analysis, material identification, plant health monitoring, water quality analysis, and environmental monitoring.
Q: How does the sensor work?
A: The sensor combines three AS7265x spectral sensors, each with its own set of bandpass filters, to capture light intensity at specific wavelengths. It uses an integrated LED to illuminate the target and measures the reflected light.
Q: Is this sensor compatible with Qwiic ecosystem?
A: Yes, the sensor features a Qwiic connector, allowing for easy plug-and-play connectivity with other Qwiic-enabled devices without soldering or complex wiring.
Q: What software and libraries are available for this sensor?
A: SparkFun provides Arduino and Python libraries to simplify communication and data acquisition from the sensor. Additionally, the AS7265x datasheet offers detailed information on sensor registers and communication protocols.