Blinking electronic business card with NFC by Greg Steiert on Hackaday.io:
Reduce, Reuse, Recycle with this durable business card. Instead of filling landfills with dead trees, you can fill the bits in their contact folder by sharing your VCARD with a simple tap. The logo glows when the tag is read to acknowledge the transaction. There are also holes in the corners so that you can mount it, or wear it if you feel the need to join #badgelife.
This design uses the ST25DV04 to share contact information through NFC. It takes advantage of the energy harvesting function to light up the logo when the tag is read. The logo is lit by reverse mounted LEDs shining through the board from the back side.
The easiest way to configure the part is with one of the mobile apps provided by ST on their website. See the instructions for more details on configuration.