I Built a PCB Business Card That Lights Up When You Tap It
A PCB business card with a batteryless LED, powered by the phone that taps it
A hardware enthusiast designed a circuit-board business card with an NFC chip and a batteryless LED that lights up Charizard's tail when tapped by a phone. The card harvests power from the phone's NFC field, but writing the URL to the chip proved tricky: standard iPhone apps rejected the blank NTAG I²C Plus chip. He wrote a custom Core NFC app to send raw commands, successfully programming the cards. The project highlights the magic of powering objects wirelessly and the software challenges lurking at the end of hardware projects.
You're not reading the tag. You're powering it.
- Neywiny
We just did this https://news.ycombinator.com/item?id=49478426 this is starting to become the risc v of fpga resumes. It's certainly work and making anything that exists and works even somewhat is commendable but it's getting played out
- hexapus
AI:DR
- taylorhou
is it possible to do this with a wearable? say jewelry? i've been fascinated with the whole digital to physical world dislocation and this inspires me to dust off an old idea of around the world "collecting" passport stamps but the only way to actually collect them is by a physical tap. similarly, i can see jewelry that lights up upon being tapped by a phone or together. fun
- disdegeneration
Next stage EInk card having a personalized Information and / or pitch..
If you ever build that deck, Joe, call me?
- mahirsaid
2nd one this week on this site. must be a trend or something?