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Craft & Design

Tim made an auto-firing water cannon! He writes –

Once upon a time a subdivision swimming pool caused a minor problem, but to a problem solving geek a problem is a problem that needs an answer. So what were the problem and the solution? Well for all you legal types it is rabbits eating in my garden. So for the sake of this discussion we are talking about rabbits, however I must make a disclaimer that in motion detection and autofire if an unwitting person is tresspassing on my property and happens to walk into the field of fire… well we will refer to them as collateral damage…

Waterhobo – [via] Link.

8 thoughts on “Waterhobo

  1. says:


    I normally applaud needless use of technology, but this is really a waste of good parts.

    The computer vision is only used to sense movement and the servo is only used to blast the entire area.

    The exact same function could be implemented by a garden sprinkler and a proximity sensor.

  2. eckern says:

    what exactly does “one shot one kill” refer to here? this thing fires randomly when excited. maybe you should replace the marines logo background with the blackwater logo.

  3. dragonphyre says:

    With another servo, and just a little bit more tweaking–you could have it aim and hit the ‘rabbits’ dead on every time.

    Oh, and your garden looks like grass. Might want to weed a bit more often.

  4. Blitz-ner says:

    Very impressive stuff! I wouldn’t say it was a waste of parts either, the camera catches the hilarity of surprised rabbits. But I agree with dragonphyre, a few more servos and you could snipe those rabbits and make it seem more intimidating.

    I also think an alarm/siren would make a good addition. Just a quick beep is all. You could turn it off at night using a photocell (and maybe switch to a strobe light).

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