These kits are specifically intended to be built and disassembled repeatedly, and classrooms are a great place for small ... 3D printed version, or even a giant hydraulic powered arm.

Inside is a PWM controller which sends power to a small DC motor. A 3D-printed arm is attached to the motor, which hosts a pair of magnets. As the arm spins inside the enclosure, the magnetic ...

A hobbyist has shared his recent project on building a micro robot arm with balanced counterweights, designed for compact yet ...