Toward this goal he dissolved his SF Transit Clipper Card in acetone to get at the NFC tag embedded inside. The tag consists of a tiny chip attached to an antenna the size of the card itself. It took about three days (video below the break) for the layers to separate and [Stephen] was able to extricate the tag.
He ended up trying a few different ways of storing the delicate chip and antenna, including a lump of Sugru as well as a waterproof aspirin band, pictured to the right.
One supposes the transit pass idea might save you a little time, but what would really simplify your life would be having a single wearable tag that unlocked a bunch of things. Also it should be noted that, un-coolly, damaging a card violates SF Transit’s terms of service…
HaD has covered NFC wearables before, including the phone-unlocking NFC ring as well as the NFC ring box. This NFC-controlled infinity mirror makes great use of the technology.
Filed under: lifehacks