Algodoo

I rated this highly because it would be difficult for me to make a simpler or more code efficient design. I like the remote display that can be placed anywhere. I like the fact that, by using lasers, the code only gets run during the brief period when changing gears. I like the fact that you didn't need any scene.my, _member, or even local variables.

Thanks, s_noonan

I think the only way it could be more simple is by making it the type of transmission where its "A to shift up, Z to shift down" kind of thing.
But I honestly have no idea how to do that

This gearbox can be made scaleable by making the circles proportional to the size of the lasers.

I'm not sure how to do that

Make all gearbox lasers size = 0.2.
Replace "e.geom.radius = x.xxxx;" with "e.geom.radius = x.xxxx * size / 0.02;" for all gearbox lasers.
Press "Shift" while scaling gearbox.

Awesome! thanks for the info, s_noonan

Im gonna try this soon