[OLD] 100dB Dremel Tool Air Raid Siren (6-8 Port)

Check out V2.5 of this siren which is dual tone and is even louder!

Whenever I make an air raid siren, it always stays next to the bench power supply as lugging that thing around doesn't sound like fun. Until, I was looking around and realized a Dremel is the perfect tool for an air raid siren. High RPM, and portability!

It is a 6-8 port siren, designed to be very lightweight and take little filament, thus the thin walls. As shown in the pictures, it reaches 100dB at ~1ft, and keeps a sustained above 85dB for a decent distance. It is for sure compatible with the 7760, but I didn't see another Dremel model with the same shaped chuck, thus I don't know its compatibility with other models.

To assemble, unscrew the nose cap from the Dremel, and then screw on the stator. Then, push the chopper onto the chuck. Make sure the bottom half of the chopper (the side with 6 holes) is at the bottom of the stator! The chopper-chuck fit was very loose for me, but when spinning it up, the gyroscopic forces seem to keep it from falling off or scraping and make it run super smooth with almost no vibrations. So I'll take that as a “feature?”

(Yes I ran out of filament mid print on the chopper so that is why it is 2 colors, and yes the print quality is awful. New printer soon??)