Fresh hacks every day
[Smells of Bikes] wanted to add laser etching to the list of tricks his home CNC setup is capable of. He has a diode which will work for the task, but he needed a driver that could be interfaced with the CNC system. He ended up designing a driver board based around the LM3402 chip. Now driving one of these laser diodes isn't all that different from driving a Light Emitting Diode. He chose to … [Read more...]
We think it's a great learning experience to tear back the veil of abstraction and learn a bit more about the hardware found on an Arduino board. This project is a great example. [Scott Daniels] takes a look at the other voltage measurement options available to AVR chips used by Arduino. If you've used the analogRead() function then you've already measured a voltage using the Arduino. But do … [Read more...]
We don't really know what to say. This Skeeball cabinet is built entirely from Knex. It works exactly how you'd expect Skeeball to work. You plug in quarter and it dispenses balls and keeps score. [Shadowman39] worked on the build for more than a year. Everything that went into it is a Knex part with the exception of a few rubber bands, and the paper numbers that are used on the scoreboard. … [Read more...]
As part of a class at University, [Emacheen22] and his teammates turned an old Connect 4 game into a binary clock. This image shows the device nearing completion, but the final build includes the game tokens which diffuse the LED light. We enjoy the concept, but think there are a few ways to improve on it for the next iteration. If you're interested in making your own we'd bet you can find … [Read more...]
[Jon] wanted his speakers to come on and off along with his TV. The speaker heats up if left on so he didn't want to do that. But killing the power also resets the volume level (this is an old set of PC speakers and the remote is wired, not IR) so using one of those switched power strips was out as well. He thought a bit about trying to use the power LED on the TV to build his own circuit when it … [Read more...]
http://www.youtube.com/watch?v=xLiH8l6hxlQ We passed through Tulsa Oklahoma the first day we were traveling, but it was very early in the morning, so we skipped the Fablab. On the way home though, the timing was perfect for a quick visit. [Blixa] was happy to show me around and explain how the fablab works. … [Read more...]
As an engineer at Spectrum Design in Minneapolis, [Carl] works with clients to get their product out to the masses. When designing a new USB-powered device, one client thought it would be a great idea to include a USB car charger with the device. The client promptly ordered a few thousand car chargers from China and everything was going swimmingly. Everything was fine, of course, until [Carl] … [Read more...]
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