Algodoo

First things first, use the G.E.S.M. on the bottom of the screen to edit all engine's speed.
Then use the gears at the end to power your device. The maximum number of Geneva gears in an engine is 4.
Hint: Use collision layers to overlap gears and other objects, without messing up the device. 10 Collision
layers per scene.tu
You can have a Geneva Engine to Geneva Engine to Geneva Engine, etc to have an infinite Geneva Engine. (Featured in this build)