Like most business cards, mine doesn’t have a battery. When it’s tapped against a phone, though, 21 LEDs start an animation, powered just by NFC. This project started about three months ago as an easy way to learn KiCad before jumping into more complex designs. “Easy” didn’t last long. This final product taught me more about every aspect of the PCB process than I could have expected, and the result turned out way better than I imagined. The full repo is here . Your browser does not support the video tag. I’ve seen all sorts of business cards done on PCBs. Most that I’ve seen use the silkscreen and maybe exposed copper to include contact details and a QR code. These are really cool–but they’re more about graphic design than electrical engineering. Others include more complicated features like displays, batteries, and inputs–super cool, but expensive and thick. I wanted to make something simple and cheap enough to be able to give to people. Eventually, I stumbled upon NFC business cards .…