[Jose] sent in his efforts to build his USB Transferer. I'm pretty sure it's a gameboy flash cartridge interface based on the Atmel AT90USB647 AVR microcontroller. Once the prototype board came in, he soldered the controller, gutted an old gameboy for the cartridge connector and had the device showing up on his PC by the end of the day. Oddly, the card he's interfacing with is a USB device on it's own. Until a few more details are published, I'd assume that the interface would be useful for connecting to more than just that particular card.

[Jose] thinks that the Little Sound DJ is too expensive and hard to find. Now he's trying to build an inexpensive USB programmable GameBoy cartridge. Currently he's working with a LPC2148 development board. It's not quite clear where he's going with this. He certainly wants to add USB programming, but it seems that he's trying to hack a mp3 decoder in there as well. [update: yes, I know how to spell cartridge!]

Yesterday, I was standing on a tropical island off the coast of Belize. Vacation rocked with lots of SCUBA diving, spearfishing and snorkeling. I'm back home, shaking off the jet lag and clearing up my inbox. Thanks to [fabienne] for filling in and letting me unplug for a while!

[Darkrom] has set a new standard for Hack-A-Day readers... I haven't seen it in person, but that looks like a legit Hack-A-Day tattoo.

[null] sent in a new use for a frequency generator, a spare car amp, a sub-woofer and a plastic coffee can - brass cartridge polishing.

[LoopyMind] sent in this Game Boy Advanced Movie Player IDE hack. It's pretty much a direct CF to laptop drive cable with an external battery supply.

[Dingolishious] sent in a POE UPS/remote power control solution. Could be handy if you're using many POE devices, or if you're having power issues. He added an inexpensive remote power monitor/switch solution behind his UPS. It senses power outages and kicks out an email - and allows remote power cycling of his POE devices. Of course, if you've got a linux box behind the UPS, it can monitor the output from the UPS and send notifications.

[William] added a preamp stage to his iKEY usb recorder. looks like an interesting toy - it'll record audio directly to a USB flash key. The pre-amp allows him to record in more challenging environments.

[Andrew] noted a simple mod to increase the deadly fire power of the ubiquitous airsoft pellet gun. It's just a matter of reducing some extra space in the spring compression area.

Last but not least, [VIPER] modded his projector to use a 12v halogen headlight bulb. Not a bad idea - at one point I was pondering a 550 watt source four halogen as a possible replacement.

This one's been making the blog rounds, but it really fits us. Nintendo makes one, but this instructables tells you how to make your own for a DS lite. It uses a PIC 12F675 to read the input line and activate a vibration motor from an old nokia cell phone.

Oh, speaking of instructables, I forgot to mention that they finally picked a winner for their laser etching machine. Of course, if you lack the budget, you can make your own for $60.

[Jowan] sent in this excellent gameboy cartridge hack. The cartridge contains 1MB of flash and an 8 bit serial I/O interface. He's using it to play percussion with some solenoids and a custom rom. If you guys like it, he might be convinced to put together a how-to on hacking the cartridge.

[Reilly] translated some content from this site and brings us an interesting mod to run a Nintendo DS at 1.7x normal speed. The mod allows the addition of a switch for overclocking on demand. Nothing like a good overclocking to end the day.

[Tom] pointed out this nintendo DS midi wifi hack demo. [0xtob] and [therain] put on a demo of using a ds as a midi device. Check out the video. The two most interesting applications demo'ed: [to me] The kaos pad app and using the DS as a midi playback device. [I wonder how long until we see a DS orchestra. Seems like the DS still has plenty of potential for development. [via musicthing]

[therain] has added a MIDI port to his Nintendo DS. It's just a two wire connection so it's pretty easy if you've got an extra cart laying around. As a demo, he wrote a program that uses the touchpad to act as two Control Change devices. One is the X value and the other the Y so it behaves similar to the Korg Kaoss pad. He's working on a sequencer as well.

[Avelino Herrera Morales] wrote in to tell us about his Game Boy Advance MIDI project. It's pretty neat since it only takes two resistors and a link cable to use. The link cable has a slotted connector so you can use a chunk of protoboard to connect to the pins. He has software the does all of the MIDI packet generation. As an example, he uses the GBA to control a Chameleon synthesizer.

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The e-Reader is an add-on product for the Nintendo Game Boy Advance. It has a simple optical card swipe for loading programs off of specially encoded cards. The location of the link port adapter keeps the device from being used with the Nintendo DS. Reader [Caitsith2] has posted instructions for modifying the reader for use with the DS. If you don't plan on using it with your GBA you can pull the entire board. Once you've got the e-Reader switched you can do fun stuff like printing out your own homebrew e-Reader cards.

Thanks to Create Digital Music for pointing me to the awesome work of Gijs Geikes. This is his latest sequencer creation. It is designed to get its clock signal from Little Sound Dj running on a Gameboy. The sequencer controls plugin modules that are attached to a parallel port. Here's a great sample of the output. He's got schematics on his site, which are easy to comprehend when compared to his bizarro board etching. One of the plugins is an earlier project: The Tape Sequencer. Have a listen to that too.

Variometers are used by para/hang gliders to measure their vertical climb/sink rate. This data helps pilots find and catch thermals. The software runs on a flash ROM cartridge and captures flight data. The data from up to 50 stored flights can be recalled later. The altimeter is a simple pressure transducer that plugs into the link port on the Gameboy Advance.

[thanks Sean2e]

natrium42, the original PassMe designer, has released a guide for building a serial interface on the Nintendo DS. It does require you to flash a new firmware on the Passme, but other than that it is just a matter of soldering wires to the RX and TX. He's tested it with a keyboard, a bluetooth module, and a USB adapter. If you want to hook it to a computer you'll need the level converter he suggests. There is a lot of potential here.

In other news: StoneCypher has offered a bounty for an open source TCP/IP implementation on the DS; it's already broken $1100.

[thanks pete]

Development of DSLinux continues to progress. The work of developer Pepsiman has really helped move things along. They've got a working Sash shell and framebuffer support. Just yesterday a touchscreen keyboard was added to ease use. It's still in early development; The shift, alt, and ctrl keys don't work and the repeat rate is a little quick. I'm sure they'll get the bugs ironed out soon enough. I look forward to seeing some unique homebrew user interfaces that take full advantage of the dual screens.

oh yeah. this is what the world needs next in mass production. now before you start yelling at me over belt buckles and nintendo's obsession with them, let me point out this is not the NES belt buckle you all saw awhile back (though both are insanely cool and nostalgic) nor is this the game boy floppy disk drive we showed you. this is the work of an artist and hacker. one that isn't afraid to make a statement with a working game boy strapped on as a belt buckle. the link provided shows you the play by play of how it's made and how it's applied and chromed out. within hours you'll be sporting your bling bling belt buckle in all it's nintendo glory. plus, take it to parties and insist that chicks play some link's awakening and if they don't get you past the first dungeon, there will be consequences. thanks [FRANKLI]