ReBot-DevArm: open-source Robotic Arm | Hacker News

A Hacker News thread compared two open-source robot arm kits: the cheaper SO-ARM101 and the pricier ReBot Arm B601.

SO-ARM101 is sold assembled and positioned as a low-cost way to learn robotics, while B601 is sold unassembled but claims better payload, reach, and repeatability.

Commenters also debated how the arms’ degrees of freedom are counted, highlighting spec comparisons that are not always apples to apples.

The discussion underscores growing interest in affordable physical AI hardware beyond simulation.