Hack A Day Goes Autonomous

cuborg

After declaring our independence last fall, complete site autonomy seemed like the next logical step. Using some clever coding we have developed a system that will let Hack a Day run without any intervention. The first layer in this system is topic selection. All tip line submissions are sent through a series of filters. These look for keywords like “firmware”, “POV”, “microcontroller”, “video”, “linux”, “WRT”, “GPS”, “PCB”, “TLA”. Each submission is given a l33tness ranking based on these words and the best tip is immediately thrown away. The second highest link is then passed through our advanced anti-duping engine that confirms the link hasn’t been posted in the last week. The post text is generated using Markov chains in what top scientists suspect is a miracle. The story is then automatically cut and pasted into Digg without credit. To foster discussion the reader comments are automatically seeded with “first post” and “this is not a hack” on every post. This system is implemented using a large quantity of duct tape (code and literal) on our brand new Linksys WRT54G beowulf cluster. We hope this system serves you well. We’ve been working on an “auto-hacking robot” to generate how-tos as well, but on its test run it instinctively disassembled itself.

Related news: Team Hack a Day merges with Team Engadget
[photo credit]

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Reversing Extension Tube For Macro Photography

extension tube

Reversing the lens orientation is common practice in macro photography. To get even more magnification you can increase the distance between the film and lens by using an extension tube or bellows. [Kevin] built this variable length extension tube by modifying a bunch of cheap used filters. When I say “modify” I mean he “broke the glass out with a hammer”. The base of the extension tube is a body cap that has had the center removed. Glued on top of body cap is a filter ring with the male threads pointing forward to act as the reverse lens mount. You can add any number of additional rings to change the length. It’s very important to be thorough when cleaning your filter rings otherwise you might damage your camera internals.

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Multicolored Ethernet Controlled LED Lamp

led lamp

[Laurens Tromp] stumbled upon this LED lamp project while looking for a datasheet. The lamp has two heads with 252 LEDs each. The individual heads have equal number of red, blue, green, yellow and white LEDs. At the base of the lamp is a touch pad that has a virtual slider for each individual color’s intensity. The heads can be controlled separately or together. The lamp can also be operated over ethernet since its controller is a RabbitCore RCM2200. The only answer I can’t seem to find in the extensive documentation is how much this milled aluminum monstrosity weighs: 110 pounds.

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Camera Adapter For Detecting Melanoma

ring adapter

[MM] has built a simple lighting adapter for analyzing skin lesions. Different layers of the skin absorb different parts of the light spectrum. By shining those particular wave lengths on the skin you can get an image of the lesion in various layers. This camera adapter is designed for a Nikon Coolpix E3100 digital camera. The ring of LEDs contains blue, green, red, and IR. White is included as well for taking normal pictures. A polarized filter is used to cut down on light reflections from the skin surface. The device does have some calibration issues since it was soldered by hand, but the preliminary results look very promising.

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Cheap Car Stereo

headunit

[Chris Rybitski] didn’t really have any money to spend when the headunit in his car died. He did have a broken JVC CD player from a friend and decided to convert that into something hideous he could use in the car. The amplifier portion still worked, but the CD section didn’t. Unplugging the CD board kept the amp from functioning, so he cut off the bulky motors instead. The internal power for the player was already 12V so he powered it directly from the car. He added an old CDROM drive, made a wired remote for the controls and stuffed everything in an old Mac case. Once completed, he set it under the rear glass for everyone to admire.

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Computer Controlled Multiple Light Dimmer

light dimmer

[SeBsZ] built this 16 dimmable lights controller based on his friend Christian N?g’s PC_DIMMER project. The PC_DIMMER project supports up to 128 individual lamps with 255 steps each. The controller boards feature an Atmel ATTiny2313 microcontroller that controls 8 lamps. Sebsz built two boards for his project and has status indicators mounted on the side of the box. Everything is driven by Christian’s free software through a serial connection. SeBsZ warns that this is a 230V@50Hz design and you will need to modify it if you intend to use it in the US.

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