It has six gears: five stepped gears and one drive gear on the input shaft. First tests are accomplished with a 3D-printed handle, similar to a hand crank used to start really old cars.

you might be interested in this awesome 3D printed hand crank generator that is capable of producing 30W of power. This project not only offers a practical application but also provides a great ...

While desktop 3D printing is an ... the torque from the hand crank into the high speed necessary to get usable electricity out of the generator. The separate gear shafts were necessary to keep ...

Instead of having to use a hand ... 3D-printer plastic body, but as a concession, we get an uninterrupted view of the starter gear as it reaches out and spins the flywheel. Warped's 3D-printed ...