Leapfrog DIDJ

Since we first mentioned the Leapfrog DIDJ, a lot has happened. A number of avid readers of Hack a Day teamed up with a couple hackers experienced with the DIDJ, and have managed to make some huge progress into making a linux based game console on the cheap. For all the readers who missed out on the last sale on Woot, its about time for a second chance.

The team working over at the HackerFoundry forum have managed to gain serial console access, map the file system, create a fake update server, and are almost at a point where replacing the stock OS and firmware can be done with software alone. They have also designed and tested a homebrew cartridge with a slot for a microSD card and breakouts for expansion and debugging.

Right now they are looking for someone with experience snooping USB protocols to figure out how the device communicates to the computer, as well as anyone who is interesting in just testing or playing around with what they have done so far. There are a number of tutorials and walk-throughs on the eLinux wiki. Its amazing how far this group has come in just two months.

Guitar echo pedal built with mbed

[Vsergeev] built an echo pedal for a guitar or with other audio manipulation applications. He used an mbed microcontroller for the project. You may remember Hackaday writer [Phil] labeling the mbed an ‘Arduino on steroids’, and it certainly handles this audio processing quite well. We’ve included a clip of the echo effect after the break. During the design process, [Vsergeev] used LTspice to simulate the analog circuitry and make things right before committing to the physical circuits.

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Hackaday links: March 28, 2010

Cardboard record player

[Yen] tipped us off about this cardboard record player. It’s a marketing tool that you receive in the mail. Inside the cardboard packaging is a record and the packaging itself can be folded into a player.

Hackable handheld

The NanoNote is a tiny handheld housing a lot of power for a small price. It ships running openWRT and sports a full keyboard, 336MHz processor, 32 MB ram, and 2 GB of flash memory. Not bad for $99. [Thanks Drone via Linux Devices]

Virtual page flipping physical interface

Love reading ebooks but miss flipping through the pages? [Marcin Szewczyk] developed this interface that lets you flip a couple of sheets of plastic to turn and fan through pages on the screen.

Augmented reality tat

Not interested in supporting an ink artist or just can’t decide on the design? Perhaps you should get an augmented reality marker tattooed on your arm and have the art digitally added for those who have already made the switch away from using their analog-only eyes. [Thanks DETN8R via Asylum]

Cooking with a CPU

[Bo3bo3] is practicing the art of cooking with processors but he’s bumped things up a notch. Instead of cooking inside a computer case, he removed the processor from the board and made it USB powered. [Thanks Waseem]