Here we have a toy car modified to use a drill as the powertrain. [Hans] has thrown a 12v 4.5 amp battery in to power the motor and it tops out around 9 miles per hour. This is similar in concept to the trash-based go cart from last week but this time there’s video. He’s built a couple of these and there’s footage of both after the break. Our favorite part is from the first video when dad chuckles with glee from behind the camera as son whips around the neighborhood on the mean-sounding machine.
[Vikash] was having trouble using his netbook in the dark so he added a keyboard light. He’s got a Dell Vostro A90 which is the same hardware as the popular Dell Mini 9. We agree that the condensed keyboard layout makes it hard to type without looking; just try to find the quotation mark, brackets, and tilde keys! He added an LED to the bezel around the LCD screen in order to shed light on the situation. Now the LED can be turned on using CTRL. An ATtiny13 microcontroller monitors pins 1 and 11 of the keyboard, waiting for the CTRL keypress, then turns on the light when it receives it. This hardware solution means it doesn’t matter if you’re running a Hackintosh (like he is), Ubuntu (like we are), or that other OS.
This is an array of flourescent tubes that form a display. The video above is just two modules of a ten module installation that [Valentin] and his team are showing at an exhibition in Berlin tomorrow. The connected modules form something of a scrolling 16-segment display (similar to the 17 segment display modules of the ninja party badges but much larger). They’re using triacs, optocouplers, DMX, and an Arduino to interface a computer with the 182 fluorescent tubes of the display. Check out a second video after the break to see (or be blinded by) all ten modules pulling 10,000 watts.
When designing legged robots, we generally see an even number of legs. Mainly, we think, it is due to us modelling things after nature. But with robotics, you’re free to do whatever you want. [Iketomu-san] has built this unsettling 5 legged robot out of parts he had lying around. The gait is fairly interesting. He mentions that it could be used for robot fighting, where the odd leg would serve as a prop from behind and the two legs up front could be weapons. What kind of gait or use can you come up with for this thing?
In case you missed it back in June, the Palm Pre was rooted by extracting the Root ROM from a Palm tool used to reset a device with damaged software. A lot has been learned from examining the code inside that ROM but we’re most amused by one thing in particular. If you grew up in the 80′s there’s a pretty good chance you know the Konami Code by heart. So did the developers of WebOS, the firmware running on the Palm Pre. By inputting the familiar (UpUpDownDownLeftRightLeftRightBA) set of gestures the handset enters Developer mode for connection to the SDK which was leaked last summer but is now in open release.
This is the multichord, a one-string musical instrument built by [Christopher Mitchell]. The string is a 20 pound mono-filament thread stretched between a wooden bridge and the read/write head of a hard drive. The idea is that the vibrations of the string are picked up and amplified acoustically by the sounding box that serves as the body of the instrument. The frequency of vibration (pitch) is changed by adjusting the tension of the string through the application of various voltages to the HDD head. A relief spring has been added to the head to take the resting tension off of it, making it a lot easier to fine-tune the settings for each note. A keyboard made of twelve buttons selects each different pitch as the string is plucked.
[Christopher] is continuing to post great hacks; we’ve seen a glove input and a giant VU meter from him in the past. Take a look at the multichord in action after the break.
[Rossum] is at it again. This time, he has created a super tiny media device to get us drooling. You might recall him from the 8-bit device we showed you before. The Nanotouch is roughly the dimensions of a 96×64 OLED screen(slightly larger than a quarter), with about 1/3 to 1/2 of an inch of stuff packed behind it. The screen itself is mounted atop 4 buttons. This allows you to depress the screen edges for navigation. He does mention that this design needs a little work to prolong the life of the screen, but we really like the intuitive way of navigating. At its heart is an ATmega32u4.
We thought his last version was fantastic, but this one has us enamored. He states he’ll publish schematics and code, as he did before. We just didn’t want to wait to share.
You can now download the exploit package for the PlayStation 3. [Geohot] just posted the code you need to pull off the exploit we told you about on Sunday, making it available on a “silver platter” with just a bit of explanation on how it works. He’s located a critical portion of the memory to attack. By allocating it, pointing a whole bunch of code at those addresses, then deallocating it he causes many calls to invalid addresses. At the same time as those invalid calls he “glitches” the memory bus using a button on his FPGA board to hold it low for 40ns. This trips up the hypervisor security and somehow allows read/write access to that section of memory. Gentleman and Ladies, start your hacking. We wish you the best of luck!
