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Hackaday links: October 17, 2010

Posted: October 17th, 2010, 3:00pm MDT by Mike Szczys

Cards you should crank These greeting cards must be the product of a mechanical engineer run amok. They come with a crank and are designed to entertain with their simple, yet elegant movements. [Thanks Phil] Magnetic card stripe reader [JP] built an Arduino based magnetic card reader. It uses off-the-shelf parts but if you don’t [...]
Master clock system uses all logic, no microcontrollers

Posted: October 17th, 2010, 1:00pm MDT by Mike Szczys

What you see above is a master clock. It is the center of a system that can run an unlimited number of slave clocks, keeping them on-time thanks to its ability to synchronize with an atomic clock. [Brett Oliver] put together the project back in 2005 using digital logic chips, and no programmable microcontrollers. This [...]
Gesture controlled robotic hand

Posted: October 17th, 2010, 12:00pm MDT by Mike Szczys

Inspired by the control system for the AMP suits in the movie Avatar, [Feelpavan] built this gesture controlled robotic hand. So far there is functionality for the wrists to rotate and bend, as well as for the fingers to flex (but not individually). This is accomplished by three servo motors on the hand assembly. The [...]
Live action fighting games

Posted: October 17th, 2010, 10:17am MDT by Mike Szczys

Here’s a strange one. This fighting game uses a video game interface to instruct modern-age gladiators on how to bring the pain. The costumed fighters cannot see anything other than a set of lights in their helmets instructing them to move or punch. A camera films them and overlays the footage on a digital background [...]
Homemade music player

Posted: October 17th, 2010, 7:45am MDT by Jakob Griffith

Sadly, this pocket mp3 wav player doesn’t come close to the capabilities of even an iPod generation 1 yet, but you have to give [Owen] props for making it in less than 24 hours. The system consists of a Propeller MCU (cleverly wired to be swappable with “shields” similar to Arduino systems), SD card for [...]