Tap a phone on the card and nine LEDs light up in sequence that emulates a neural network. The whole thing runs on whatever energy a mobiles NFC field can push into a loop of copper on a credit-card-sized PCB (about 5 mA at 2 V).
The card is to promote my new book, Embedded AI: Intelligence at the Deep Edge (No Starch Press), and Reefwing Software, the company behind it. Front Side: the book title, my name and the LED network. Back Side: Reefwing branding, a QR code, the web address and three programming pads. Both the NFC tag and the QR code point at a short URL.
The NFC business card is an open-source hardware and software project, with the design files and code released under the MIT licence. The Reefwing Software repository includes the EasyEDA schematic and PCB layout, artwork, Arduino firmware and programming instructions, so you can build your own card, adapt the design or use it as a starting point for another project. The design is still a prototype, so check the repository’s validation notes before ordering boards.
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