All builds
Participant project

FreshSort

FreshSort is a produce-grading station built on the Arduino UNO Q. A Logitech C270 looks at one fruit at a time on a white tray; the UNO Q's Linux side white-balances the frame against the paper background, then grades it on three axes — ripeness (hue-band classification mapped to the industry 5-stage color scale), total blemish area (%), and largest single blemish (%). The verdict fires over the built-in Bridge to the microcontroller side: LED matrix shows ✓ or ✗, speaker beeps accept/reject. Every fruit gets a photo-stamped CSV log row. It grades bananas AND green chilies — it auto-detects which produce it's looking at and switches grading rulebooks. Everything — vision, grading, logging — runs locally on the board. No cloud, no GPU server, no model training: it's a calibrated instrument, tuned live today against frames from this very desk.

FreshSort — photo 1

Inside the build

Team GradeX

What they built: FreshSort is a produce-grading station built on the Arduino UNO Q. A Logitech C270 looks at one fruit at a time on a white tray; the UNO Q's Linux side white-balances the frame against the paper background, then grades it on three axes — ripeness (hue-band classification mapped to the industry 5-stage color scale), total blemish area (%), and largest single blemish (%). The verdict fires over the built-in Bridge to the microcontroller side: LED matrix shows ✓ or ✗, speaker beeps accept/reject. Every fruit gets a photo-stamped CSV log row. It grades bananas AND green chilies — it auto-detects which produce it's looking at and switches grading rulebooks. Everything — vision, grading, logging — runs locally on the board. No cloud, no GPU server, no model training: it's a calibrated instrument, tuned live today against frames from this very desk.

What it solves: This is built for Fresh Produce vendors, farmers and exporters. Yash runs a fresh-produce venture that supplied Gir Kesar mangoes to Blinkit/Hyperpure this season. Quick-commerce buyers reject entire lots above a 5% defect threshold and return them at the vendor's cost, and grading today is a human at a pack-house table: no record, no consistency, disputes at goods-receipt, and farmers eating the loss. The green chilies graded today were ordered from Zepto mid-buildathon. FreshSort gives pack-houses, FPOs, and q-commerce vendors three things: consistent buyer-spec grading, a physical accept/reject signal any line worker understands, and a photo-stamped log that is dispute-proof evidence at the buyer's gate and fair payment proof for the farmer. Built for the ₹4,000-board price point and offline operation that a rural pack-house actually needs.

LET’S BUILD TOGETHER

Host an event with us.

Tell us about your company or college and what you’d like to create together.

Which events would you like to host or collaborate on?

Select all that apply.

Our team will reply within 24–48 hours.