Eaurdinateur - Water Calculator

The eau-rdinateur (water-computer in French) is a binary addition calculator that works using water. It uses taped siphons to implement the AND and XOR logic of a half adder. This was heavily inspired by this video: https://www.youtube.com/watch?v=IxXaizglscw and this publication: https://cristal.univ-lille.fr/~jdelahay/pls/2002/090.pdf

To use it, place the eaurdinateur flat, pour water in the "A" and "B" reservoirs to form the inputs, lift the eaudinateur up, let the water flow, and the results should appear in the "C" reservoirs. The reservoirs with logos can be discarded, they are just spill over.

This version is fully print-in-place, no need for supports. The "front" face is meant to be printed as the bottom layer in order for it to be as transparent as possible. Transparent PLA works surprisingly well. You could try printing it in PETG as well but the top part requires kinda crazy bridging, so it might not work. For the best results, I recommend using the provided .3mf project file.

This project was developed for the 2025 "Fête de la Science" (Science Festival) in Grenoble, by the Maverick / Graoumph2 LJK / Inria team. Here is a link to the presentation that accompanied the demo: https://drive.google.com/drive/folders/1WJmSI7Uj1e5PcFX6X-RcNjs7bMSdvgOG?usp=drive_link

This model was designed in OnShape, so you can clone it and edit it online: https://cad.onshape.com/documents/fc43c0e1836b0ac0c94c09bb/w/068544d3604b614cc3e9da9a/e/376520358f3bb1a654ce2fb0