BEACON Self-Defense Necklace
After a friend was robbed at gunpoint on her walk home, I designed a wearable alarm for her. The act of co-designing a wearable alarm was an act of love as well as a design challenge. Ultimately, we created a necklace-like piece with a (very loud) piezo-style buzzer that is triggered when the wearer closes the open circuit (located on the center midline of the necklace) with a metal ring. We used copper, but any metallic/conductive trigger would work.
Visit the tutorial for making your very own BEACON on Instructables.
Read Edge of Urge's article on the BEACON.