Most of the published video tutorials that you could learn from.
Multi-axles, many-directional LEGO Mindstorms mechanism for transferring power (almost a gear box). Part 1
Given the large number of gear wheels and axles in each EV3 and NXT sets there are many possibilities for building gear mechanisms. We are developing something like a gear box that has different axles that could all turn in different directions.
- 03 Jan 2016