Electromechanical Air Raid Siren

thingiverse

A simple siren which can be quiet loud and works pretty well. I`ve printed it with PLA. Works with any standard brushed motor. Logically, the frequency corresponds to the speed (s^-1) multiplied by 4. Have fun but please watch your fingers; *it is not a child's toy*! See a first test run: https://www.youtube.com/watch?v=6iD_pmzFevg (The sound of the recording is unedited and comes from an iPhone 12.) ..more will follow soon!