Projects / Color-Sort Chute
Color-Sort Chute
Build a keepable color sorter from laser-cut 3mm birch plywood: an inclined chute, TCS34725 RGB sensor, and SG90 divert flaps that route objects into bins.
$12 Sensing
Digital guide + cut files + BOM + code · Parts sourced separately · Ages 8–14 with adult help
ActuationTCS34725 + 2× SG90
Structure3mm birch chute
ControllerArduino Uno/Nano
Build time4–6 hours
Skill levelIntermediate
Ages8+
Pack contents
- Build guide: chute, sensor mount, flap linkage, bin layout
- SVG cut files for chute sides, flaps, sensor bridge, bins
- First principles: white balance, hue from RGB, presence detection, flap timing
- Arduino sketch: TCS34725 + dual SG90 divert logic
- Verified BOM (~$52–120 hardware)
Typical hardware cost
Default structure is laser-cut birch plywood with real fasteners and hobby electronics—honest BOM, not mystery modules.
- ~$52–120 in typical parts
- Digital pack price ≠ hardware
The $12 pack is the digital guide + cut files + BOM + lessons + code, plus printable Builder's Corner build journal pages. Hardware sourced separately — see Where to get kit materials.
Questions? Email us at lance.haney@gmail.com.
Pricing
- Home / Personal license $12
- Classroom license $45 — 1 teacher, up to 30 studentsOne $45 Classroom license covers one group of up to 30 students. Each additional group needs another license.
- Build materials available at cost + 10% — email for a quote
Learning outcomes
- Mount a TCS34725 so lighting stays consistent over the chute
- White-balance the sensor, then calibrate hue windows for at least three target colors
- Time divert flaps so objects clear before the next decision
- Explain false positives from glare and ambient light