• AC Gears
I'm not much a jewelry type of person...I've even ditched the wristwatch, because it seems redundant/cumbersome when toting a smart device. But I'm feeling this Mac power button style pendant which pulsates once you pop in a battery for those special occasions. Just be prepared to hear a lot of "are you turned on?" jokes if you wear this. The iNecklace is completely open source, this hackable. The source code, circuit board files, schematics and CAD files are posted on GitHub. Video of the pendant pulsating below...