He is the subject editor for gears and cams of the Journal Mechanism and Machine Theory. Dr. Gonzalez-Perez received his M.S. in Mechanical Engineering in 1999 from the University of Murcia (UM), ...

A diode allows current to travel in only one direction. With that in mind, [Alex] built a mechanical diode that will only allow gear rotation in one direction to be transmitted through the system.

The engineering that [Miklos] put into his respooler design is pretty amazing. Bearings excepted, the whole thing is 3D printed. A transmission made of herringbone gears powers both the take-up ...