The number one and number two things asked after presentation of our DIYDTG were…
“How does it hold up in the wash?”
“How did you change out the inks?”
While we’ve explained the first several times (regular ink washes out, DTG ink gets a little lighter but survives) we can hopefully answer the second with a tutorial.
Continue reading “(mini)How-To: Refill your DTG inks”
Building an LED flashlight is simple, right? Take a battery, connect it to an LED by way of a resistor. Alright wise guy, now make one that steps up the voltage for multiple LEDs and don’t use a boost-converter IC to do so.
[fede.tft] shares a flashlight built inside of a used glue stick case. It’s the perfect size for one AA battery (we’re always on the lookout for good battery cases), and a shape that we’re familiar with as a flashlight. The problem is that he wants two white LEDs but with just one AA cell he’s never going to have more that 1.5V available. He licked that problem, getting to 7.2V by designing his own step-up converter using one transistor, an inductor, and three passive components. To get the inductor he needs, a stock part is disassembled and rewound to suit. Maybe you just end up with a flashlight when all is said and done, but then again, the Sistine Chapel is just some paintings on a ceiling.
[Alex] had an old FM radio tuner card come his way. It used an ISA connector, a standard that went the way of the dodo in the mid-nineties. With the challenge of implementing an ISA-bus to configure the card he set out on his mission. What he came up with is a working radio using the ISA card and driven by a PIC 16F877. Join us after the break for schematic, code, and a few details. Continue reading “Resurrecting ISA hardware”
Take a few moments and browse this gallery from the Library of Congress. Tasked with the job of preserving the roughly 150 million historical items, they are constantly developing new methods using bleeding edge technology. There is an odd balance of some of the oldest documents in tandem with some of the newest technology evident in these pictures. From doing spectral scans of ancient books to laser mapping warped phonographs, everything must be preserved and documented.
[Steve Norris] has been devoting his time, effort, and knowledge to the most noble of causes; cool beverage acquisition. Baxter the ButlerBot and RoboFridge work in tandem to deliver cold ones when needed. As you can see in the video, this possibly over engineered system works quite smooth. Though the details on his site are pretty limited, browsing his Flickr stream will get you all those delicious construction photos you crave.
Though it is in the beginning stages of development, the Distributed Flight Array is already looking very interesting. Each unit can scuttle across the ground using the down force from its prop, but when 4 or more join forces, they can take off and fly. The documentation shows that they should be smart enough to fly in random configurations, though in the video we only see the standard 4 prop layout. This is being worked on by the same people who produced the balancing cube.