Instructables

"Trip Wire Alarm" for annoying sister types

Step 1: Gather yer parts

To make a long story short my dog chewed up this plastic helicopter that went to this clever toy my dad brought home from some company at work. At any rate this toy featured an adjustable base wth a one of those DC electric motors inside. The motor in turn turned the helicopers rotor and when the switch was released, made the copter fly into the air. A any rate that's what I used to make the obnoxious alarm sound (ie: the copper coils and magnets grinding together in the motor). If you have this toy and coinicidentally you have the same predicament as I did, assemble your alarm as shown. If not, a sturdy piece of card board with a DC motor taped on top should suffice. Along with that you'll need two double A batteries, some wire if you are not making yours out of the the heli copter toy, kite string, duct tape, a glue gun, and a 50 cent D-CON mouse trap.
Use a peg with two pieces of foil w/wires attached and the foil glued to the peg with the insulator in between them :)
this could be used in other scenarios if the current was used to detonate a charge.
or like a gun couldn't hurt if you live in the hood
i like where this is going
You've been watching Eagle Eye too many times, huh?
Perhaps...
i only saw it once
strcrusher4 years ago
Once i tried to turn on a car alarm that my dad took out of his car with a 9v battery and 2 AA and it was LOUD and it can make u get out of the the street u can still her it i mean seriously so maybe i could use that
i made one using a speaker and a simple circuit... if tripped, it makes a noise that makes you feel as if your brain is in a blender... it hurts. a lot. and it MAKES them leave if they don't want to go crazy from it.
Whaleman6 years ago
sweet! will it work for annoying cousin types as well?
Syncubus6 years ago
100 bonus points for using a mousetrap for a switch! Sheer genius!
NTOcomander #0 (author) 7 years ago
I have one! How ever this make shift one has more practical aplications and perfect for the spy movies where you have to cut the red wire before you can infitrate the enemy base. Like the webcam but the prank is a one time thing and you'd have to have a little old man constantly reseting it for you.
Ehhhh..... To make it (loud) not (quiet) i reccomend buying one of thos persional alarm things at the dollar store! (they make a high pich !eiiiieiiiieiiiieiiii! :-D
CameronSS7 years ago
I'd hook up a webcam so I could watch people jump ten feet in the air at midnight with the booty of a fridge raid...
Run N Gun7 years ago
A mod for this would be using a window alarm. This alarm uses to parts, and when they are seperated they produce a very high pitched noise also. Using this you could glue a piece of fishing string to the part that can seperate and hide the alarm behind books and tie the string to something. Just a Thought~
knexer17 years ago
Why not have the mouse trap set and the string tied to it then, because it would be more sensative.
crapflinger7 years ago
very simple..hehe...for those who don't have the mysterious hellicopter toy of doom....you could use a simple piezo electric buzzer from radio shack...or anything like that to make the buzz...
Dark_Helmet7 years ago
That is indeed very, VERY annoying. Cool idea...I'll probably make something similar but with circuits ripped from an old LogiBlocks set. Man I loved those things.
jarv347 years ago
neat idea using the mousetrap, i've made similar sister-traps with a clothespin like clip as a switch but this is much more dramatic.
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