Thursday, April 21, 2011

Laser triggered waterbomb trap

Back at school I built a little trap in order to fool some other pupils.
At first I took apart an old CD-drive and removed the laser-moving unit:

the laser unit
The laser unit will be used as our trigger mechanism.
Just solder a connection to the motor and add a needle to the moving part.
The needle will move forward and pop our waterballoon.
video

I used a laser and a photocell to build a lightbarrier which would activat the trap.
The light barrier was placed across the pupils' common room.
Here's the trap's schematic:

This is the laser and the receiver (both are battery powered) :


receiver with relais


laser


















If the laser beam is interrupted the relais will activate the CD-drive-trigger and pop the waterbomb right over somebody's head.
Here the mounted trigger armed with one waterbomb:
video


And here the first victim (of course with slowmow) :
video

And here's an old video about the whole thing:

So this is one way to have fun with your old CD-Drive!

52 comments:

  1. thats a pretty interesting idea. seems hard to do though.

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  2. If I could pull this off, I'd do it in so many places. Somebody should mass produce it.
    Profusely

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  3. Hahahaha, very simple design - Nice idea :)

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  4. Wow that's really cool. Wish I could build it.

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  5. awesome, i would use this to secure my room when im gone.... expect id fill it with bees

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  6. wow buddy, great post! But where did you get all your visitors from? Help a brother out!

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  7. holy crap adding this to my favourites so i can make it when my exams end.

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  8. haha, taht's a good one!

    utubed.blogspot.com

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  9. haha, not very practical, BUT very fun.

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  10. brilliant, finally a use for all those old cd drives knocking about

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  11. Awesome idea, saving this for a rainy day

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  12. That's amazing! Unfortunately I don't have the time.

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  13. thats sweet im gonna have to try it out!

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  14. Freaking rofl! I love stuff like this!

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  15. That is... that is just ingenious. Definitely following, could you check me out at mark1mod0.blogspot.com ?

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  16. Great idea. Folloow @ http://rmad4132.blogspot.com/

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  17. wish i wasn't a retard and could do stuff like this. glad someone can.

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  18. AMAZING! I love your blog. One day, I'll be like you. haha

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  19. have to try this on my roomate when he's out of town

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  20. Good Idea!
    I should do something as well with my HD and CDD, well now I got something

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  21. Aw, i love all this awesome tech stuff. I am amazed at what people can do with old computers and lasers.

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  22. this blog is awesome. I'm going to have to try this.

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  23. that is awesome, I'm totally trying that!

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  24. How difficult would it be to replace the water balloon with say, a shotgun? Just curious.

    ~H. Coct

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  25. Nothing is better than a mechanism that make we laugh at other people.

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  26. Quite sophisticated for what it does, but brilliant nonetheless! Electronics were always meant for entertainment

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  27. Genius, simply genius. Kudos to you.

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  28. This is absolutely brilliant. I wonder if you could do this on a larger scale, and set it up for a cup of water? A Bucket??

    WHERE WILL THE MADNESS END????

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  29. haha lost.in.idaho your comment made me laugh, hard! x]

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  30. amazing, i'd make use of this in order to safe my personal space whenever i'm eliminated.... anticipate identity fill up this along with bees.

    mmo18
    lol代练
    lol elo boost

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