Air Raid Siren

thingiverse

Quick and dirty air raid siren that makes sound audible from a distance. The original idea took about 20 minutes to conceptualize, and the first design was finalized in roughly the same timeframe. Printing each part required around four hours. A new updated version features dual tone outer casing, resulting in a distinct sound compared to the original. This siren is built upon a repurposed quadcopter motor, specifically the 2212 model from the crashed Cheerson CX-20, and runs smoothly on both 3S and 4S batteries. However, prolonged usage may cause the motor to overheat, though this hasn't been an issue for me thus far. Located at the bottom of the siren are two 20mm round circles, designed for easy attachment in various locations. A custom GoPro mount was also created to securely attach the siren beneath a quadcopter's camera mount, enabling remote-controlled flying with an integrated siren - a feature that's both useful and humorous. When printing the outer casing, supports were used but proved unnecessary; a 40% infill rate provided extra durability, though lower rates will suffice for most applications. This model was printed at a resolution of 0.3mm, and even lower resolutions would be sufficient due to the Prusa original 0.4 nozzle's limitations in printing larger layer heights. If you have any suggestions on how to improve or redesign this siren, or adapt it for your specific needs, please don't hesitate to reach out.