This is an air raid siren I made for a friend as a Christmas gift. in this project you will find: the .STL files to print it yourself, BOM and a design/build log.
I know there are plenty air raid sirens available from Thingiverse and other people, but this is made to fit my 3D printer and the parts I had on hands. Besides that, I wanted to challenge myself to design this in Fusion360.