GET THE HARDWARE

Build it or buy it.

Source every part yourself from Amazon, or grab a ready-to-build kit with all the parts and the 3D-printed casing included.

BEST VALUE
COMPLETE KIT

Physics Cart Kit

Every electronic part plus the full 3D-printed casing — cart shell, wheels, photogate body, and mounts. Just solder, flash, and run labs.

✓All 8 electronic components below
✓LiPo battery included — USB-C charging
✓Complete 3D-printed casing set
✓Pre-flashed firmware on the ESP32
✓Works with all 8 lab documents
$35 · shipping not included
Buy the kit
PRINTS ONLY

3D-Printed Casing

No printer? Get just the printed parts and buy the electronics yourself from the list below.

✓Cart shell, lid & wheel set
✓Photogate body & spring launcher
✓Sensor mounts & load-cell bumper
✓PETG, 100% infill where it matters
$9.99 · shipping not included
Buy the casing
CUSTOM PCB

SmartCart V2 PCB

SmartCart V2 PCB

Skip the fab-house order — get the assembled V2 board straight from us. The ESP32 and SMD resistors come pre-soldered; the header pins are included but not soldered on.

✓2-layer board, 45 × 50 mm
✓ESP32 + SMD resistors, caps & diode pre-soldered
✓Header pins included — not soldered on
$14.99 · shipping not included
Buy the PCB

Source the parts yourself

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Total price per cart (3D prints not included · multi-packs spread across several carts) ~$17.62

Amazon links open a search for the exact part — pick any well-reviewed listing. The PCB + ESP32 + resistors row is ordered from JLCPCB — grab the Gerber files on the PCB page; breadboard builds skip it entirely.