Saying non credible af here, but in theory one could add a upwards facing shotgun shells on top of the helmet, triggered by a Camera/proximity sensor if it detects a drone/falling grande. Maybe add a gyroscope to check if the helmet is actually facing upwards before triggering. All in all unit cost could be below 250$
- 6x 12 gauge shells with bird shot
- Raspberry pi type controller
- USB cam
- Laser distance sensor
- gyroscope
- servo trigger
I feel like the physics behind attaching shotgun shells to your helmet with the intention of shooting down drones would break your neck.
Just attach downwards facing blanks that trigger at the same time.
Checkmate physics
credible solution right there