SafeRing

The SafeRing was a prototype for a wearable device created as part of my Wearable class’s final project. It is a device that utilizes RFID energy harvesting to power a low power microcontroller (ATTiny85) which collects sensor data and stores said data in the memory of an RFID-enabled chip (NT3H IC by NXP). The chip then transmits that data to a user. The ATTiny85 was programmed using embedded C++. Data is transmitted to the user over NFC as a text file that a user can read using their NFC enabled device.

Hardware

Hardware prototype setup

SafeRing in action

Successful NFC transaction from prototype

PCB

1st iteration PCB based on the hardware prototype