Tiny credit card computer includes eInk screen and is just 1mm thick — Muxcard is powered by the ESP32-C3 microcontroller A GitHub project shares details of the prototype for 'a fully working computer that is literally the size of a credit card,' dubbed the Muxcard #hardware https://www.tomshardware.com/maker-stem/microcontrollers-projects/tiny-credit-card-computer-includes-eink-screen-and-is-just-1mm-thick-muxcard-is-powered-by-the-esp32-c3-microcontroller