Author: Mike Szczys

6403 Articles

Hackaday Links: Sunday, November 29

November 29, 2009 by 47 Comments

Sometimes we wonder if we’re making good choices with PCB layout when using EagleCAD. Watch how the pros do it with a video of an hour-long Adafruit PCB layout session compressed into seven minutes.

[Elijah] documented his RepStrap build. This is a chicken-or-egg project in that RepStrap machines are built without the assistance of an already existing RepRap.

Here’s an ASUS concept from CeBIT this year for a laptop that has two touch screens and no physical keyboard. Isn’t this just the DS project we saw this week but in a nice case?

[James] conjured up a physical realization of the Spinning Wheel of Death for an art exhibit. We can’t stop smiling when looking at this artful hack.

I’m sure nobody will raise an eyebrow when you pop out that roll of duct-tape and affix your phone to the airplane window. That’s what [floe] did to make this airline flight time-lapse video with an Android phone. Aren’t you supposed to turn off all electronics for takeoff?

GSM Enabled Security Door

November 28, 2009 by 14 Comments

The security door at the front of [Oliver’s] building uses an intercom system to let in guests remotely. Each unit has an intercom handset with a button that unlocks the door. [Oliver] wanted a way to enter without carrying any extra items so he built a system to unlock the door with his cell phone.

He patched into the intercom and attached a GSM module. The module runs python so he wrote a script that will monitor the entryway buzzer, then wait for an approved cell phone connection to unlock it. He went through a couple of different iterations for the final project. The first attempt used XBee modules to communicate between the intercom handset and the GSM module. For the final version, he snaked cable through his wall using rare-earth magnets (creative!) in order to forgo the use of a battery in the handset.

Who doesn’t carry a cell phone with them?  Because of this, the use of GSM modules in automation is a trend we think will continue to gain popularity.

13th Century Navigation System

November 28, 2009 by 27 Comments

[ted id=694]

[Tom Wujec] explains how an astrolabe works and its importance in our technological development. He argues that an astrolabe was the world’s first “popular computer”. It measures the sky and that measurement can be used to tell time, survey land, and navigate a ship.

Astrolabes are built from three pieces and according to [Tom], educated children in the 1200’s would not just have been able to use one, but could build one as well. Electronics have certainly made our lives easier, but there’s something powerful about such a useful yet simple device.

DS Goes Full Size – Pockets Everywhere Rally In Protest

November 26, 2009 by 22 Comments

It’s hard to believe we missed this one from a couple of years back but we’re thankful that reader [Christian] tipped us off about it. This a Nintendo DS with two tablet pc screens being used as an external display. He’s using an FPGA but not to emulate the processor. It is translating the video data from the DS board into usable signal for the larger LCD screens. In the video after the break you can see that pen input has been implemented, with the FPGA sending location data back to the DS.

[Neal], the creator, priced the project out at around $580. It’s worth a lot more considering the know-how needed to get the video scaling and pen input right using the FPGA. It won’t fit in your pocket, but it doesn’t have a case either so it’s not going anywhere anytime soon.

Continue reading “DS Goes Full Size – Pockets Everywhere Rally In Protest” →

Recover Borked HDD After Xbox 360 Ban

November 25, 2009 by 33 Comments

[Incudie] tipped us off about a method to fix a borked HDD in your Xbox 360. Many of the one million consoles banned earlier in the month also had the hard disks scrambled making off-line gaming impossible as well. It turns out that this is caused by having a ban flag in the NAND chip on the motherboard. It has been discovered that because of wear levelling, the NAND will have two copies of the “secdata.bin” file which stores the ban flag. Please note, this will NOT allow the console to use Xbox Live, it just re-enables the HDD.

The quick and dirty of the fix is as follows: First the NAND is dumped from your Xbox 360 to a computer. After verifying the file, it can be opened in a HEX editor and the two copies of “secdata.bin” located. Once identified by date, the older version is injected on top of the newer to overwrite the ban flag.

Looks like this is not for the faint of heart, but if you got banned for modding in the first place this should be easy to pull off.

Update: Looks like xbox-scene now has a collection of apps to help you with this process. [Thanks CollinstheClown]

TI Sports Watch For Hacking

November 25, 2009 by 60 Comments

How would you like to have a 3-axis accelerometer, pressure sensor, temperature sensor, RF wireless, and an LCD screen in a development package?  What if we told you that you can have it in the form factor of a wristwatch offering from Texas Instruments? How much would you pay for such a device? Quit guessing, you can pick it up for just $49 with an estimated delivery in mid-February of next year.

Our tip-line has been packed with emails about this since it was announced on Monday. The device ships with the firmware to serve as a sports watch with heart rate monitor. The price is pretty good just for that functionality but this package also includes a USB programming and emulation dongle so that you can develop your own firmware. It looks like the included development software is written for Windows but we’re hoping you can get it running on other platforms as well.

The LCD is a segment display, so you won’t see DOOM running on board. That said, we expect your first project to turn this into a wireless controller using the buttons and accelerometer.