We see a lot of Halloween projects attempt to scare people. Many of them work with the element of surprise, jumping or flashing lights when triggered. We’ve noticed though, people have come to expect those things. This project is a real sleeper. No one expects a couple car horns to blare in their face  when they push the pumpkin’s nose. We know it would make us jump. You can see it in action as well as get the entire circuit from his site. We doubt his neighbors will find it as amusing as we do.

[via Hacked Gadgets]

Artist [Ariel Schlesinger] has managed to replace an air horn‘s compressed air tank with butane fuel. This hack manages to change the pitch of the horn slightly, as well as making one very noisy flamethrower. While not as impressive as other flamethrowers, this would probably take the cake for most achievable. Currently the site containing the how-to is down, but we would have to recommend not doing this at home anyway. Video after the jump.

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The Griffin AirCurve Dock is a nifty gadget that uses a coiled horn to increase the volume of your iPhone’s speaker. Griffin’s marketing claims that their passive device delivers “amazing amplification” and “you’ll swear there are full-sized speakers in there.” Meh. It does look like an interesting project for someone with a 3D printer. You could experiment with different passage and dock shapes. At least it gives us an excuse to post two massive DIY horns.

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