Forget Raspberry Pi: this computer is literally the size of a credit card

A Reddit maker built a functioning, untethered computer about the size and thickness of a credit card.

The device uses an ESP32-C3FH4, e-paper display, NFC, and a thin LiPo battery, with a GitHub repo shared for the build.

Making it that small required solving connector, soldering, and structural fragility challenges.

The project highlights how far hobbyist hardware miniaturization can go, and where practical limits still remain.