How to Make a Mousetrap Trip Wire Alarm | DIY - YouTube
Shotshell primer perimeter alarm system with Kevlar tripwire and my added touch, a modified junction box for weather housing and holes to feed vines or camouflage netting through. : r/Survival
6 DIY Trip Wire Alarms for Off-Grid Security | Urban Survival Site
Laser Tripwire Alarm Electronics Project | PCB | Maker Pro