Hack a Day shirts at Defcon

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We’ve printed [John Keppel]‘s winning t-shirt design. They’ll be available for purchase in the vendor area at Defcon. If you’re at the con, pick one up because we don’t have any plans yet to distribute them online. We will have a small number of women’s tank tops as well. See you there!

Sewer clog alert system

xbee

[miketysklar] noticed that a local business was having trouble with their sewage lines. People kept flushing tampons down toilets and it ended up clogging the pump. They had already installed a set of lights and horns to go off when it clogged, but they were hoping for SMS capability so they would know wherever they were. The new system piggybacks off the flashing lights by powering an XBee when they are activated. The signal it sends is recieved by another XBee attached to a computer running a python script. The script then sends a SMS via email to the poor fellow who has to fix it.

Related: Wireless Bootloading

Scanner sensor multi touch

[Kyle McDonald] had a Visioneer XP 100 portable scanner laying around, so he started trying to come up with alternative uses for it. In the video above, we can see a multitouch setup rigged together using Openframeworks in Ubuntu. As you can see in the video, there’s some considerable lag. That is due to the 250-500 ms of buffering built into the scanner. It does have nice resolution; 10k pixels wide at 60 fps, so it has to be useful for something (aside from scanning). Anyone got any ideas? He says if the field of view was wider, he’d use it on a river bed to watch fish.

Stereo Guitar

stereo_guitar

[Megatronix] wrote in to show us this pretty crazy guitar mod. He has re wired the pickups to make the guitar a “Stereo Guitar“. Generally, the two pickup locations on a guitar are there to provide tonal variation. You can adjust the influence of each to get the sound you want. [Megatronix] decided to re wire the setup so that one is the left channel and one is the right. Thus providing actual stereo sound from his guitar. This will limit his tonal variation considerably, but should at least serve as a proof of concept. We really want to hear a recording of it in action though.

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