The first step in making a fluidic logic gate is to create a chamber that is an oblong sphere or similar. This can be a sphere stretched vertically (for reference purposes, it can be in any orientation in the final implementation) by a factor of two. So your sphere might be 15cm in diameter and 30cm tall. This sphere is a hollow in a block of material.

The second step is to add a number of inputs, usually two but can be three or for or theoretically any number though there must be some practical limit. Put these inputs at a 45 degree angle from the vertical and radially arranged like spokes on a wheel. Arrange them such that they meet at the top of the sphere with a slight distance apart or none if you like. The point is that their streams must be able to meet at the top of the chamber where they will divert each other into the various logic term collectors below.

The third step in designing a fluidic logic gate is to add logic terms. The streams all deflect each other in such a way that they bounce around following the curve of the sphere and want to exit at the bottom region of the sphere. There you put collectors which are half-spheres with output tubes, structures that exist within the chamber. You can collect individual terms and or them together or make specially shaped collectors that flow into a single output tube. Either way or any way, the goal is the catch the desired flow terms and allow the others to flow out the bottom or other term locations. All terms must have an exit path to prevent blockage.

That's it, print it and test it - you've got yourself a fluidic logic gate! wasn't that intuitive? Now go build something wonderful!

Les