This is a 3D printable robotic hand prototype. Each finger is actuated with tensioned wire system using Pololu Micro DC motors. Each finger has 3 parts like a real finger and is has microchannels embedded in it for the tensioned wire. The wires is tightened to the tip of the finger goes to the motor axle and then back on the tip of teh finger. When the motor rotates in one direction it maked the finger flex and when it rotates in the other direction, the finger extends. You can check an early finger actuation here: https://www.youtube.com/shorts/zfY4gvhUGJQ