Some people look at a 3D printer and think "this will make useful parts for my projects." Some people hear an air raid siren, and assume there must be an historical war re-enactment taking place ...

[MrExpert] is here with the build you need – an air raid siren you can print at home. It’s a simple build, which makes it fun and accessible for just about anyone with a 3D printer. Rotational ...