Etching small patterns in Glass
Why Hacker News recommends it
HN recommends it as a highly informative look at micro-etching glass and the smallest Tesla valves.
What it is
Huygens Optics experiments with etching tiny patterns in glass, covering hydrofluoric acid risks, buffered oxide etch, photoresist and chromium masks, and laser-induced etching. It ends with attempts at microscopic Tesla valves.
Recommended by 4 HN commenters across 3 different months, 2021 to 2024.
What Hacker News said
Recommends osamagirl69 · 2021-08 · on “Tesla valve”
There is an youtube video[1] by the excellent channel Huygens Optics which goes through trying to make a microscopic tesla valve. The valve does not work as a checkvalve (it is sufficiently small that surface tension and all that work differently than in a macroscopic system), but the author argues that it did satisfy the real goal of being a tesla valve -- which is to look sexy and high tech. [1] [this video]
Recommends showerst · 2021-08 · on “Tesla valve”
For a fun visual demonstration, check out nighthawkinlight's video where he runs a flamefront through one -- [LINK] Also seconding the Huygen's optics video osamagirl69 already posted below -- [this video]
Recommends thrown_22 · 2022-08 · on “Perfluorocubane is (as you would expect) weird”
I read that, then I saw this guys youtube channel: [this video] on the bright side I've found something I have not been desensitized to no matter how many time I've watched it.
Recommends samstave · 2024-03 · on “High-speed microscale 3D printing”
[LINK] Seems like it would work beautifully. What would be cool is to make a logic-gate-tesla-valve-micro-hydraulic computer? -- The video on micro etching glass with HF is highly informative on this post... he talks about etching tesla valves at the end... [LINK] <-- 30 microns long with channel width of 4 microns via etched glass... [LINK] [this video] -- So I wonder what resolution would be possible via the 3d version. What would be really interesting to see with this method would be to make a blend of a spiral-screw with the tesla valves to climb or control vertical rates of flow. --- Since this process can print in ceramics, I wonder if the can effectively make a "super-conductive-nano-wire