Adafruit publishes NFC wearables DIY guide

Electronics hobby supplier Adafruit Industries has posted a DIY guide to creating wearable NFC devices that can be used to unlock an Android phone. “This guide covers creating an NFC ring, putting an NFC tag in your nail polish, modding your Android installation to read tags from the lockscreen, and creating an automation tool chain to unlock the phone when the desired tag is scanned,” Adafruit says.