NFC – OSH Park

Greg Steiert has added sound to his amazing NFC business card:

Beeping, Blinking Business-card Badge (B4)

This 1mm thick, environmentally friendly, re-usable business card delivers a vcard with a tap and actively indicates the access with audio and visual cues. Everything is powered from the energy harvested through NFC so there are no batteries to replace. The card provides a URL to a vcard. This is a great project for OSHPARK’s Flex service.

This video shows the 1mm thin Beeping Blinking Business card Badge playing a tune while being read:

This project has evolved over the years. The current design consists of the NXP NTAG I2C Plus NFC EEPROM that supports energy harvesting. The NTAG device powers a WCH CH32V003 MCU that drives the buzzer and LED(s). There are three implementations of this circuit:

b4thin: 1mm thin flex-circuit design

b4handy: a full size hand solderable design

nfcwchsao a compact pocketable design

I’ve tried to document my learnings along the way, including designing a battle board to see which NFC EEPROM provides the most current. These insights are provided in the project logs.

These designs are ideal for OSH Park’s board service. OSH Park provides 3 copies of the design so you get three attempts to assemble your custom business card. Sometimes, I made use of all three. The KiCad files are available on github so you can customize them yourself and build your own personalized card. With the current three versions of the design there is something for every skill level. Think twice about the 1mm thin design if you don’t have access to a hot plate or heat gun to mount the thin leadless packages

Blinking electronic business card with NFC by Greg Steiert on Hackaday.io:

Blinking Business-card Badge (B3)

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.

https://www.instagram.com/p/Bngl2wlFATu/?utm_source=ig_embed_loading

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.

The design is available at Upverter. All the parts are available from Mouser and you can find links in the bill of material at Octopart.