Buzz
Concerned about an intruder in your secret lair? This DIY sonic tripwire alarm is simple to construct, delivers a sufficient level of noise, and works wonders for games of hide-and-seek or setting up a perimeter to secure any area you want to protect.
This post is part of our Evil Week series at Mytour, where we dive into the darker side of accomplishing tasks. Sometimes evil is justified, but often, understanding evil is the key to overcoming it. For more, visit our evil week tag page.
The video above shows you the entire process in action, giving you a clear demonstration. To sum up, you’ll need a battery-powered alarm clock (be sure to pick the right one for the job), fishing wire, a plastic or wooden clothespin, an Allen key, some foil, an old gift card, wire, and electrical tape.
For the full step-by-step guide (linked below), you're essentially building a circuit between the foil-covered ends of the clothespin and the clock, using the battery compartment. When the clothespin is closed, the circuit is complete, and the alarm sounds off. When the prongs don’t connect, the circuit remains open, keeping things safe. You’ll use a piece of gift card and fishing wire to separate the prongs. When someone trips the wire, the card gets pulled out, and the alarm goes off, signaling an intruder.
It’s straightforward, made with easy-to-find, off-the-shelf components, and functions flawlessly without unnecessary complexity. Watch the video above and then explore the detailed walkthrough on Instructables below.
