Apparently some of the traffic lights in Johannesburg, South Africa have SIM cards in them to help maintain the network without a physical connection. Now that’s some and not all, but apparently thieves have learned that the SIMs can be used in cell phones to make anonymous and unlimited calls. Officials are convinced that the thieves have inside information because they only crack open the lights that DO contain a card.
We’re white hats here at Hackaday and certainly don’t want to give out information that aids criminals. But since this is already a huge problem we have an idea of how thieves might be identifying which lights to rob. Sure, they probably do have inside information, but wouldn’t it be fairly simple to track down which lights use cellular communication by using a home made spectrum analyzer? We guess it would depend on how often the lights send out communications bursts. Does anyone have insight on this? Leave you thoughts in the comments.
[Brett Graham] and [David Cox] are taking the Kinect out into the world thanks to this handheld hack they call the Drill of Depth. Apparently, the Kinect wants 12V at 1A which is quite easy to provide with a rechargeable power tool like this Ryobi drill. The setup features a 4.3″ touchscreen display, connected to the Gumstix Overo Air that is running Linux. They claim that there’s a “legitimate scientific reason” for building the device but they’re not sharing it yet.
So what would you use this for? We wonder if it would be possible to roll a GPS into the mix, then use post processing from the captured data to recreate the environment in a virtual setting? Imagine if a weekend spent walking around campus and processing the results let you model your University and make it an add-on level for your favorite game. Or perhaps this could be paired with a regular camera to generate high-quality 3D skinning data for Google Earth. That’s what we came up with, what do you think?
Sometimes we like to take a few minutes away from Hackaday to spend time with our families. But just when you take your eyes off of the incoming comments, Trolls are bound to strike. Well, [Caleb] and I found a solution to the problem in the form of a troll sniffing rat. This beady-eyed vermin sits on my desk and waits. When a trolling comment is detected its eyes glow red and an alarm is sounded. Join us after the break for more about this silly project.
Continue reading “Hackaday unleashes a Troll sniffing rat”
Almost a month ago I started trying to reverse engineer an inexpensive LED color changing light bulb. With your help I’ve mapped out the circuit, and taken control of the bulb. But there’s still a few mysteries in this little blinker. Join me after the break to see what I’ve done so far, peruse the schematic and source code, and to help solve the two remaining mysteries.
Continue reading “Part 2: Help me reverse engineer an LED light bulb”
Here’s a blacksmith turning 4 inch framing nails into buckles. In the clip after the break he starts by heating and bending the nail around a square form. Next the excess gets cut off and both sides of the square frame are ground flat while in a vise. A smaller nail serves as the prong and a flat piece of metal is shaped so that this can be connected to a leather strap. This ends up as part of the support system for a full suit of armor.
We’ve seen a lot of great welding projects over the years, but today’s blacksmithing video leaves us wanting. If you’ve got a favorite project that involved this kind of work tip us off about it and we’ll see if we can get some more hacks for the Smithies out there.
Continue reading “Nails and some blacksmithing”
[Bissinblob] has about 70 of these WYSE 3125SE thin clients and is offering them up at $15 a piece plus shipping. That’s quite a steal!
The specs are as follows:
- NS Geode GX1 core (SC2200)266Mhz
- Flash 32MB
- RAM 64MB
- Video 1280×1024(at 8-bit color), 1024×768 (at 16-bit)
- 10/100 network
- 3x usb
- 1x serial
- 1x parallel
- 2x PS/2
Be sure to let us know what you’re doing with them if you happen to get one. If you have something lying around that needs to go, feel free to post it on our classifieds.
This isn’t a hack. But it is a decidedly interesting piece of mechanical technology. The Whiffletree shown above is a way to turn binary data into a mechanical analog value. [Bill Hammack] explains how this assembly is used in a typewriter and how a whiffletree can convert binary data to a set of analog outputs.
These linkages are what makes an IBM Selectrix Typewriter work. You know, the one with the globe stylus instead of individual hammers for each key? [Bill] uses the typewriter as the example in his illustrations that show how each bit of data positions the output in a predictably different location. We’re familiar with other mechanical representations of binary data but converting to an analog value mechanically is a new concept for us. Lukily, the videos that [Bill] put together are fantastic at explaining the concepts. Not surprising, since he is a professor at the University of Illinois at Urbana-Champaign . See them both after the break.
Continue reading “Wiffletree: a mechanical digital to analog converter”