3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: or [email protected]
There are CAD communities available at: [email protected] or [email protected]
Rules
-
No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
-
Be respectful, especially when disagreeing. Everyone should feel welcome here.
-
No porn (NSFW prints are acceptable but must be marked NSFW)
-
No Ads / Spamming / Guerrilla Marketing
-
Do not create links to reddit
-
If you see an issue please flag it
-
No guns
-
No injury gore posts
If you need an easy way to host pictures, https://catbox.moe may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
Moderation policy: Light, mostly invisible
Air raid sirens have an important job to do, and have been a critical piece of public safety infrastructure in times of geopolitical turmoil. They sound quite unlike anything else, by virtue of their mechanical method of generating an extremely loud sound output. They’re actually remarkably simple to build yourself, as [MarkMakies] demonstrates.
you wanna trigger someone's PTSD? play with these in civilian places
Attach it to a drone.
Print a lot of them and attach them to a flock of geese.
Honk honk, mothertrucker!
I live in the Midwest. We have these all over as a weather alerting system. They test them monthly at a fixed time, but I could see this triggering someone - especially if they didn't know it was coming.
Ahhww, finally a candidate sound generator for my earPod buster bike horn. Nice!
Don't you need a diesel engine to run these things?
To spin the rotor, Mark used a powerful brushless motor controlled by a common hobby speed controller
I don't know. The article might contain information like that.
Yeah but why would you want to use a tiny brushless motor when you can use a hemi V8 diesel?
So what you're saying is that this would make the perfect car horn