A developer has built a remarkably thin computer that is almost the same size and thickness as a standard credit card, potentially opening the door to a new category of ultra-portable computing devices. Called the “Muxcard,” the experimental device combines a fully functional microcomputer, wireless connectivity, NFC support , sensors, and an E Ink display into a body measuring just 1mm thick – thin enough to fit inside a regular wallet alongside bank cards. The project, created by GitHub user “krauseler,” has quickly drawn attention from the maker and hardware enthusiast community for pushing the physical limits of compact electronics. A tiny computer designed to fit in your wallet Despite its slim form factor, the Muxcard includes surprisingly capable hardware. The device is powered by an ESP32-C3 microcontroller and integrates a 1.54-inch flexible E Ink display, NFC hardware, an IMU motion sensor, Bluetooth and Wi-Fi connectivity, and a miniature lithium-polymer battery.…