SparkFun
SparkFun Triad Spectroscopy Sensor - AS7265x (Qwiic)
The SparkFun Triad Spectroscopy Sensor combines three AS7265x spectral sensors with onboard UV, visible, and IR LEDs to measure light across 18 individual fr...
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
Jargon buster
Plain-language definitions for the technical terms used above.
- AT command set
- An AT command set is a text-based control language sent over a serial terminal to configure a device. It matters because you can change settings such as baud rate and flow control without writing custom firmware.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- Polarised connector
- A connector shaped so it is intended to plug in only one way around. This helps prevent reversed wiring, which can stop a circuit from working or damage parts.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- Torque
- A twisting force that causes something to rotate, usually measured in newton-metres or kilogram-centimetres. It matters when choosing motors, servos, gears, and tools because higher torque is needed to lift heavier loads, turn larger wheels, or move mechanisms without stalling.
Find this product in
Sensors & Input
AS7265x Datasheet
Datasheet · 1.0 MB · Click any page to view full size
Qwiic Spectral Sensor AS7265x Schematic
Schematic · 65.7 KB · Click any page to view full size
AS7265x Design Considerations
Document · 2.1 MB · Click any page to view full size
White LED Datasheet
Datasheet · 3.9 MB · Click any page to view full size
IR LED Datasheet
Datasheet · 231.5 KB · Click any page to view full size
UV LED Datasheet
Datasheet · 333.1 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 987.6 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
