BrainCo put a 21-DOF dexterous hand on the table on April 10 and handed the SDK to everyone. That is the part robotics teams had been waiting for.
A hand built for robots, not people
Revo 3 is a humanoid-robot hand, not a prosthesis. Four fingers with four active joints each, a thumb with five, every joint direct-drive and backdrivable. 500Hz control loop, 20N fingertip pinch, 33 preset grasp types, and a Kapandji score BrainCo claims exceeds a human hand. Touch is where it gets strange — full-palm sensing at 0.01N resolution plus fingertip visuotactile arrays that pick up 130μm of deformation. Fine enough to feel a thread pulled across a fingertip.
The open SDK is the actual news
The SDK ships with C++ and Python samples and ROS2 bindings. Four control modes — position, impedance, MIT force-position, zero-torque — are all exposed over CAN FD, EtherCAT, or RS485 at the same 500Hz. An agent can fire one of the 33 canned grasps by ID or stream joint targets directly, and read tactile telemetry back over the same bus. Humanoid makers integrate it as an end-effector module; researchers can drop it into a manipulation pipeline without reverse-engineering a closed protocol.
BrainCo’s original business was brain-controlled prosthetics — Time 100 in 2019. That is why the touch stack shipped this serious.
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