Device Specifications

• Spectral Measurement: 18 bands across 410-940 nm wavelength range
• Microprocessor: Thing Plus RP2040 by SparkFun
• Display: 128×32 OLED display showing real-time measurement graphs
• Power Source: 2200mAh cylindrical rechargeable battery
• Data Storage: Micro SD card for measurement storage
• Clock: PCF8523 real-time clock module with CR1220 battery (records time in UTC)

Key Components

• TRIAD spectral sensor with built-in illumination lamps
• USB-C connectivity for charging and data transfer
• Integrated button interface for measurement control
• Battery disconnect switch for power conservation

Operation Features

• No assembly requirements (no soldering or 3D printing needed)
• Simple one-button measurement activation
• Real-time graphical display of spectral data
• Battery charges while device is powered on (indicated by amber LED)
• Boot screen cycle displays: Universal ID/SD card info, Battery voltage/charge status, and Spectral graph with batch number

Software

• Runs on CircuitPython (beginner-friendly, open-source)
• Software is downloadable via provided link
• Drag-and-drop programming capability
• Data includes important metadata (time/date stamps, batch numbers)

Field Use Best Practices

• Hold device steady during measurements
• Collect data in stable lighting conditions (full sun between 10am-2pm ideal)
• Record contextual information with measurements (distance, angle, light conditions, location)
• “Sandwich” observations between reference collections for calibration

Price Point

• Total component cost: approximately $146 (parts list included in documentation)

This affordable, handheld scientific instrument is designed for accessibility, making it ideal for students, educators, and scientists to explore remote sensing and spectral data collection.