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RFID NFC Tap and Go Ring for Credit Card Payment
In Europe it's getting more and more common for banks to issue "minicards" that you can place in your phone case. These always come as a secondary card, and can only be used contactless. These would be perfect for this project! Also, although most banks do indeed cancel your old card if you request a replacement, it should always be possible to request a second card. This might come at a small anual fee, but it might be worth it for such a project!
Great project! Even though I'm not really a ring-wearer, I'm definitely thinking about which object I could "upgrade"... Maybe a key ring/chain or my watch band..Lastly I would consider writing down the valid-thru date of your card, and maybe engrave it or embed it in the ring.. At least don't forget it! ;)
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