I want to make somethink like the below. if you not seen them its streams of water that by turning on and of valves to start and stop them pattens can be made.
But i want to make a desk top one, with 3 d printing I can make a nice smooth flowing streams of water about 10mm or closer togather but my thoughts are now on how to stop and start the flow. I think the best way is to have a series of solonids that divert each of the streams.
So the water is pumped up to a reservoir from what it drains out of a row of holes. then benith the hold, below and behind the holes will be a shelf which drains back in to the base to be pumped back up.
A solonid will then push out a “paddle” that will divert the water in to the shelf or let it fall down.
can anh one point to a “cheap” ish solonid with a body <10mm diamator so I can pack them togather. When i say cheap I will need about 20+ of them so ~£5 each would work.
I found some silghtly bigger and some small one that are much more expensive.
Of the alternitive is to make some of my own but never done that before…
Any other ideas, of sugestions for a cheap way to stop start the flow. the streams are narrow and the on/off must be crisp and clean. hence why thinking solonid as it can move in and out of the water flow quickly and smoothly.