DUO 128 Elite, 4 bit CPU

We’re not sure how we missed [Jack Eisenmann's] 4 bit TTL CPU when we were tipped off the first time, but we’re glad it was sent in again for us to feature it.

41 different ICs (mostly TTL) come together to comprise the DUO 128 Elite. While the architecture is a little different than what we’ve seen before, using “nyckles”, the DUO 128 Elite still works perfectly. Catch a video of some example programs, including pong, after the divide.

[Thanks Marc G-C]

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An Arduino Watch you would actually want to wear

Leather work, copper tubing, small easy to use package. Now that is a beautiful Arduino Watch. [Matthew Garten] has retrofitted his old Arduino Watch and given us the details that we crave.

Previously, all we had was a video and a few pictures of a quite uninviting watch. But now we know it has temperature, range finding, and trackball input while displaying time, games, and more with its 128 by 128 pixel OLED 16 bit display. And did we mention the much more enticing steampunk case?

Getting your message across at commencement

[Yomagaocho] is graduation from Northwestern University on June 18th (wow that’s late in the year… they must be on quarters). He decided to spice up his mortarboard for the commencement ceremony. A normal message wasn’t good enough, and even a solar-powered diorama wasn’t going to suit him. Instead he added 256 addressable LEDs to the top so that he can get his message across without being limited to a couple of words. See it demonstrated after the break.

He was nice enough to give us the technical details. The matrix is a 16×16 grid mounted in some laser-cut black acrylic. We immediately wondered about the display working in sunlight (a June graduation will probably be outside). He didn’t use any current limiting resistors with the LEDs, dangerous to the longevity but this should provide maximum brightness. It’s certainly a geeky concept, but having the ribbon cable that controls it trailing down into your robe might make those graduation photos a bit embarrassing a few years down the road. [Read more...]

WiMax antenna with auto-positioning system

[Andrew] certainly brings a bit of a James Bond feel to connecting to your WiMax base station. He built this antenna along with an auto-positioning system to get the strongest signal possible. The device, which appears a bit fragile, breaks down into a nice little case. When you get to your next checkpoint you can set it up and the stepper motor along with an ATtiny2313 will rescan to get you on with your mission as fast as possible. This is one of our favorite antenna builds so far, and we’ve seen a lot of hacked antennas. Don’t miss the action-packed trailer after the break. [Read more...]

Simple way to fix that broken Ethernet cable

Chances are you’ve come across an Ethernet cable where the small plastic tab that holds the plug in place has broken off. We have a crimper on hand and usually just throw on a new RJ45 connector but [Laxap] found a simple alternative to fix Ethernet plugs. By using a couple of correctly sized cable ties you can secure the damaged connector without replacement. The boxy locking mechanism on the end of the cable tie is used as the catch, slimmed down with the help of an X-Acto knife or razor blade. Once you’ve got the right fit, use a second cable tie to secure it to the Ethernet cable. Simple is brilliant.

[Thanks Password]

Windows 7 tablet in a carbon fiber case

If you’re not one of Apple’s devoted following the iPad means little more than new hardware you won’t use. Tired of being left out in the cold, [Slampana] built himself a Windows 7 tablet. He grabbed the motherboard and 13.4″ screen from an MSI X320, added a resistive touch screen, USB hub, internal WiFi and Bluetooth, then wrapped it up in a custom-built carbon case. It’s small, sleek, and comes in at around $600-$700. Start your drooling as you watch the demo after the break.

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Nexus one as USB host

[Sven Killig] Has managed to get his Nexus One into USB host mode. This allows him to plug in all kinds of peripherals such as web cams, keyboards, even a displaylink unit. This is fantastic as it really opens up the possibilities of this device. You can see that he now has an amazingly functional and portable system running. He mentions that it is pretty stable unless he runs big programs, we wonder if he has added any RAM to it. It is worth noting that the Droid can be USB host as well.