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Hack a Day
Regenerative bike brakes
posted Sep 4th 2008 8:36pm by Caleb Kraft
filed under: daily, misc hacks, transportation hacks
 For their senior design project at Arizona State University, these guys built a regenerative braking system for their bike. As they brake, the system spools up to give them a push back up to speed. They achieved 25% efficiency on one run, which isn’t too shabby.The site has all kinds of information. You can check out their different plans and ideas from before they decided on this specific layout as well as all their data from the test runs. Be sure to look at the piece by piece breakdown of what changes were made from the initial design.[thanks Mario Gomes]
Comments [5]
Comments are broken
posted Sep 4th 2008 7:24pm by Eliot Phillips
filed under: news
We’re working on it.
Comments [0]
Hack a Day Fail Whale Contest
posted Sep 4th 2008 3:41pm by Eliot Phillips
filed under: contests, daily, news
 We’re back! There may be a bit of oddness for the next few days. Our Fail Whale contest is still running and we’ve received over 100 entries so far. Here’s how you can participate:While we’re adding more hamsters to our server power plant we thought we’d hold a little art contest. Whenever Twitter goes down, they post the iconic Fail Whale. The Fail Whale has become so popular that it has spawned a dedicated blog and many many art projects: embroidery, tattoos, and laser cut models.We want to see what you think Hack a Day failure looks like. Create an illustration, photo, sculpture, anything that you think embodies Hack a Day failing. Send your entries to hackaday.fail@gmail.com and add them to the Hack a Day photo pool. The prize is $100 for you to spend in the No Starch Press store. Entries are due 00:00PDT Saturday September 6th 2008.[image: Bjonnh]
Comments [5]
Google Chrome webcast starts now
posted Sep 2nd 2008 1:57pm by Eliot Phillips
filed under: google hacks, news
 The webcast for Google’s new Chrome browser starts at 11PDT. The browser is supposed to feature better memory management. Right now they’re opening with Led Zeppelin and Queen, so I guess it’s supposed to be rockin’ as well. Download it for Windows here. Chromium source available here.
Comments [8]
Interactive globe display
posted Sep 2nd 2008 9:58am by Caleb Kraft
filed under: daily, misc hacks, peripherals hacks
 [ERASME] built this interactive globe interface for an exhibit on Inuit people and their land. The goal was to have a tactile input device to Google Earth data. The unit is composed of a half globe for location selection, a touch pad for layer selection, and a Wiimote for view changes.They had to develop their own driving application for Google Earth as none exists for Linux. The software, called KeyEvents takes inputs from all the devices and mimics keyboard and mouse control in Google Earth. There is much more information on how they got the pieces to work together, as well as some videos in french showing the device working. One thing that stands out though is that they decided to use direct association on their Wiimote, thus stopping rogue Wiimotes from gaining control. Who would carry a Wiimote around just to hijack public displays? We would.[thanks Leucos]
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Comments [1]
RGB desktop clock
posted Sep 1st 2008 5:30pm by Eliot Phillips
filed under: daily, misc hacks
[Mark Roy] designed this fine RGB LED desktop clock. It uses a PIC16F877A microcontroller and a DS1307N Real Time Clock. There is a ring of 12 RGB LEDs around the perimeter. Hours are indicated in red, minutes green, and seconds blue. If the hands overlap, the colors are mixed. Three buttons are used to set the time and it can run on as little as 0.7volts. You can find out more about the project on Stellar Core. He has plans to kit it in the future.
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Comments [11]
Apollo Guidance Computer clone
posted Aug 31st 2008 8:30pm by Eliot Phillips
filed under: daily, misc hacks
 [Cliff Miller] pointed out this incredible project from 2004. [John Pultorak]’s journey began in late 2000 when he decided to build a 60’s or 70’s era minicomputer. While gathering technical documentation, he found some interesting information on the Apollo Guidance Computer and felt that was the way to go. The AGC was the first integrated circuit computer ever built. Designed by MIT in 1964 it was constructed from ~5000 ICs, almost all 3-input NOR gates. [John]’s version uses late 1960’s 74LS TTL logic which gains him a 10 to 1 reduction in the number of ICs. A good thing when you have to do ~15K wirewrap connections. He also used flipflops and register chips instead of building everything from NOR gates. [John] essentially built the AGC three times: First, he coded a simulator in C++. Then, he imported the logic design into CircuitMaker to verify that it would actually work. Finally, he built the 3 by 5foot machine. He’s provided an amazing amount of documentation for anyone that wants to explore this device and the overview alone is well worth a look.
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Comments [5]
Modular portable system
posted Aug 30th 2008 9:50pm by Eliot Phillips
filed under: daily, gameboy hacks, peripherals hacks
 Reader [John Grayson], known for his multiconsole portable, has constructed a brand new portable. Not liking the controls or the tethered nature of retro TV games he decided to build a modular portable system. He built a custom system that uses cartridges created from TV game systems. The device has a 5.4″ screen and two Canon batteries for 4.5 hours of play.
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Comments [4]
HTC Dream Android phone
posted Aug 30th 2008 2:15pm by Eliot Phillips
filed under: cellphones hacks, news
 Engadget has a full gallery of the new HTC Dream, the first production phone running Android. It will be available on T-Mobile some time this Fall (missing features notwithstanding).
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Comments [9]
MySpace cofounder Tom Anderson former hacker
posted Aug 30th 2008 2:00pm by Kimberly Lau
filed under: news
 MySpace users are very familiar with the visage of their first “friend” and MySpace cofounder [Tom Anderson], but did you ever wonder what he used to do before he became everyone’s friend? TechCrunch’s investigative reporting revealed that [Tom] was a hacker in the eighties who hacked into the Chase Manhattan Bank computer system, which attracted the attention of the FBI. Under the handle “Lord Flathead”, he became the leader of a black hat hacker group by the time he was fourteen. His activities (along with those of other hackers) led to one of the largest FBI raids in California history. Because he was a minor at the time, he was not arrested, but put on probation in exchange for an agreement to stop committing computer crimes. This definitely makes having [Tom Anderson] on your friends list just a bit more interesting, doesn’t it? [via Digg]
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Comments [27]
Hacking a scale to test rocket motors
posted Aug 29th 2008 3:30pm by Caleb Kraft
filed under: daily, misc hacks
 [David Steeman] sent us this project. He uses a consumer scale to measure rocket engine thrust. He wanted to be able to map the thrust curve of his homemade rocket motors to determine whether they are meeting the design goals. It does this by measuring the force applied by the rocket engine via a microcontroller that records it in a text file on a computer. He then analyzes this data in an Excel spreadsheet.The sensors were harvested from a consumer scale while the rest of the electronics were built by hand. He’s using a PIC 18F2550 microcontroller which has a built in USB interface. He has breakdowns of each piece with detailed information on how it works as well as some nice pictures. There is also a list of future improvements that he would like to do such as increasing sample speed, integrating it with the ignition, and decreasing the physical size. Files for the schematic, firmware, and excel spreadsheet are available for download at the bottom of the page, so keep scrolling down.
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Comments [5]
1100 barrel paintball gun
posted Aug 29th 2008 2:30pm by Eliot Phillips
filed under: misc hacks, news
[Adam] and [Jamie] from Mythbusters built a paintball gun with 1100 barrels as some graphics card marketing gimmick. It’s a formidable beast, but we’re sure it takes forever to prep.[via Laughing Squid]
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Comments [27]
Tiny cubic PC
posted Aug 29th 2008 1:00pm by Kimberly Lau
filed under: pcs hacks
 We’ve been watching the progress of the Space Cube since 2004, but PC Pro managed to get their hands on it first. Developed by the Shimafuji Corporation, it comes with 16 megabytes of flash memory and a version of Red Hat is run off a 1 gigabyte CompactFlash card. The design of the Space Cube is pretty minimal, but it’s got the basics down, from a USB port to a VGA output and a D-SUB RS232 input, and even an Ethernet port. The most interesting thing about it is the Space Wire port, which is a proprietary interface use by NASA, the ESA, and JAXA for outer space. Unfortunately for working hackers, this ingenious micro-computer will set you back about £1,500. [via NOTCOT]
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Comments [12]
Solar powered ice maker
posted Aug 29th 2008 10:23am by Caleb Kraft
filed under: news, solar hacks
 Producing ice without electricity just got a lot easier thanks to these engineering students from San Jose State University. Their system uses solar heat to facilitate evaporation of a coolant. When the sun goes down and the coolant turns back to liquid, its temperature drops drastically due to extreme pressure differences. The unit can produce 14 pounds of ice per day with zero carbon footprint. It has no moving parts and an entirely sealed system, this should mean that the only maintenance necessary would be keeping the unit clean.[via DVICE]
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Comments [18]
Comcast announces 250GB bandwidth cap
posted Aug 28th 2008 9:00pm by Eliot Phillips
filed under: news
 Today, Comcast updated their Acceptable Use Policy to cover exactly what they feel is “excessive use”. When the Comcast cap starts October 1st, they will contact people breaking the 250GB per month transfer limit and ask them to curb their usage. While it’ll be hard for most people to hit this limit, we still wonder if policing 0.1% of the customer base is worth the effort. At least Comcast has bothered to state the limit instead of just secretly rewriting the meaning of the word “unlimited” like some providers.[via DSLReports][photo: monoglot]
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Comments [49]
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