{"slug": "show-hn-cubic-doggo-07b-wouf-a-low-cost-open-source-quadruped-with-st3215", "title": "Show HN: Cubic Doggo 07B Wouf: A low-cost open-source quadruped with ST3215", "summary": "A developer released Cubic Doggo 07B Wouf, an open-source 12-DOF untethered quadruped robot built from off-the-shelf components and 3D-printed parts and controlled via ROS2 Jazzy on a Raspberry Pi. The robot uses 12 ST-3215-C018 smart servos, walks forward with a 1 kg payload, runs on batteries, and requires only 2 soldering points because it has no custom PCB; FreeCAD models are available for editing and M3 screws and locknuts secure the PLA+ structures. The project is positioned as a low-cost development platform for stacking new components, with smart servos cited as required for closed-loop reinforcement learning capability.", "body_md": "Cubic Doggo 07B Wouf is a ROS2-controlled 12-DOF untethered quadruped, built with ST3215 smart servos fully with off-the-shelf components and 3D-printed parts\n\nFeaturing: * 12 ST-3215-C018 servos, usually on a bundled sale because of SO-ARM101 * Walking forward with a payload of 1 kg * Smart servos as required for closed-loop reinforcement learning capability * FreeCAD models fully available for editing * M3 screws and locknuts are used extensively (instead of glue or heat set inserts) to strengthen and secure the PLA+ printed structures. Design iterates on strengthening whichever part breaks first. Check JLCPCB for stronger components * No custom PCB (because I am terrible at it), only 2 required soldering points * Runs on a Raspberry Pi with ROS2 Jazzy installed. Joystick control ready * Walks on batteries * Aesthetics of an exposed electronic box, but great as a development platform for stacking new components on top\n\nComments URL: [https://news.ycombinator.com/item?id=50298302](https://news.ycombinator.com/item?id=50298302)\n\nPoints: 2\n\n# Comments: 0", "url": "https://wpnews.pro/news/show-hn-cubic-doggo-07b-wouf-a-low-cost-open-source-quadruped-with-st3215", "canonical_source": "https://github.com/SphericalCowww/CubicDoggo_07B", "published_at": "2026-10-30 00:28:52+00:00", "updated_at": "2026-10-30 01:17:06.689771+00:00", "lang": "en", "topics": ["robotics", "ai-research", "developer-tools"], "entities": ["Cubic Doggo 07B Wouf", "ST-3215-C018", "ROS2 Jazzy", "Raspberry Pi", "FreeCAD", "JLCPCB", "SO-ARM101"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/show-hn-cubic-doggo-07b-wouf-a-low-cost-open-source-quadruped-with-st3215", "markdown": "https://wpnews.pro/news/show-hn-cubic-doggo-07b-wouf-a-low-cost-open-source-quadruped-with-st3215.md", "text": "https://wpnews.pro/news/show-hn-cubic-doggo-07b-wouf-a-low-cost-open-source-quadruped-with-st3215.txt", "jsonld": "https://wpnews.pro/news/show-hn-cubic-doggo-07b-wouf-a-low-cost-open-source-quadruped-with-st3215.jsonld"}}