Trip Wire Alarm

A compact, rugged trip wire alarm I designed in Fusion 360 for perimeter awareness around camps, hunting blinds, sheds, gardens, or property lines. When the line is pulled, the spring-loaded release trips and sets off a 209 primer for a loud, sharp report that lets you know something crossed the line. It's simple, reliable, and quick to set up and reset.  Two Versions were made. 

What you'll need**

- One 209 primer per use

- A small compression spring (any spring that fits the bore with decent tension works; I used one from my parts bin)

- A standard small cotter pin for the trigger release.

- Fishing line, paracord, or wire for the trip line.

- A drill bit to clean out the pin holes if it prints tight. 

_ Appropriate size Metal tip to press inside firing pin itself.

Disclaimer

This alarm uses live 209 primers, which can cause burns, eye injuries, hearing damage, and fires. By downloading, printing, assembling, or using this design, you accept full responsibility for how it is made and used. I, the designer, am not responsible or liable for any injury, death, property damage, fire, legal issues, or other loss caused by the misuse, mishandling, improper assembly, modification, or failure of this alarm or any printed part. Print quality, materials, and hardware vary, and I make no guarantee of performance or safety. Always wear eye and ear protection. Load the primer last and keep the primer end pointed away from yourself and others. Don't use it near dry grass, leaves, or anything flammable. Store primers properly and follow all local, state, and federal laws on primers and alarm devices. Never set it up where it could injure people or animals or create a hazard. Keep it away from children. This is a noise-making alarm only and is not meant to be used as or converted into a weapon. If you don't agree to these terms, don't download or use this model.